Home Civil Engineering Concrete Technology Most Important MCQs Part: 2

Concrete Technology Most Important MCQs Part: 2

401 - In symmetrically reinforced sections, shrinkage stresses in concrete and steel are respectively_______________?

tensile and compressive

402 - In the method of voids for determination of the quantity of cement paste, it is assumed that

All the above.

403 - In the soundness test a specimen of hardened cement paste is ___ for a fixed time.

Boiled

404 - In the soundness test a specimen of hardened cement paste is _______ for a fixed time.

Boiled

405 - In the soundness test, the whole assembly is immersed in water for

24 hours

406 - In the wet process of cement manufacturing raw material is heated to about _____________

1300-1450 °C

407 - In the wet process, the kiln is ___________

Slightly inclined with vertical

408 - In this test, the strength and quality of concrete or rock is assessed by measuring the ___ of an ultrasonic pulse.

Velocity

409 - In universal testing machine, for a circular section specimen, the gauge length is taken to be _____________

5.65 √A

410 - In universal testing machine, for a circular section specimen, the gauge length is taken to be ______________

5.65 √A

411 - In which type of test the capillary action principle is used?

Dye penetrant test

412 - In which type of test the capillary action principle is used?

Dye penetrant test

413 - In which type of test the capillary action principle is used?

Dye penetrant test

414 - In working stress design, permissible bond stress in the case of deformed bars is more than that in plain bars by_______________?

0.4

415 - Inert material of a cement concrete mix, is

aggregate

416 - Initial setting time of Low Heat Cement should not be less than _____________

30 minutes

417 - Initial setting time of OPC should not be less than ___________

30 minutes

418 - Insoluble Residue mainly comes from which compound?

Silica

419 - Insoluble Residue mainly comes from which compound?

Silica

420 - Internal friction between the ingredients of concrete, is decreased by using

more water and coarse aggregates

421 - IS 1199:1959 is for _________

Specification for standard sand for testing of cement

422 - IS 1199:1959 is for __________

Specification for standard sand for testing of cement

423 - IS 1489(Part 1):1991 is for _________

Specification for Portland pozzolana cement Part 1 Flyash based

424 - IS 1489(Part 1):1991 is for ___________

Specification for Portland pozzolana cement Part 1 Flyash based

425 - IS 1489(Part 2):1991 is for _____________

Specification for Portland-pozzolana cement: Part 2 Calcined clay based

426 - IS 1489(Part 2):1991 is for ______________

Specification for Portland-pozzolana cement: Part 2 Calcined clay based

427 - IS 1727:1967 is for ___________

Methods of test for pozzolanic materials

428 - IS 1727:1967 is for ____________

Methods of test for pozzolanic materials

429 - IS 456 of 2000 gives the modulus of elasticity as _______

Ec = 5000 fck.5

430 - IS 457:1957 is for _____

Code of practice for general construction of plain and reinforced concrete for dams and other massive structures

431 - IS 457:1957 is for __________

Code of practice for general construction of plain and reinforced concrete for dams and other massive structures

432 - IS 650:1991 is for _____________

Specification for standard sand for testing of cement

433 - IS 650:1991 is for _____________

Specification for standard sand for testing of cement

434 - IS code for Specification for coarse and fine aggregates from natural sources for concrete?

IS 383:197

435 - IS code for Specification for coarse and fine aggregates from natural sources for concrete?

IS 383:197

436 - IS code for Specification for ordinary Portland cement, 33 grade?

IS 269:1989

437 - IS code for Specification for Portland slag cement?

IS 455:1989

438 - IS code for Specification for Portland slag cement?

IS 455:1989

439 - IS Code of practice for plain and reinforced concrete.

IS 456:2000

440 - IS Code of practice for plain and reinforced concrete.

IS 456:2000

441 - Is it possible to have 0% crack in our building?

No

442 - Is it possible to use w/c ratio as low as 5?

No

443 - Is it possible to use w/c ratio as low as 5?

No

444 - IS: 7861 part-1 deals with ___________

Hot weathering concrete

445 - IS: 7861 part-2 deals with

Cold weathering concrete

446 - ISI has specified full strength of concrete after

none of these.

447 - It __________ job-site concrete handling, and testing procedures to __________ potential liability to the company.

Improve, Decrease

448 - It __________ job-site concrete handling, curing, sampling and testing procedures

Improves

449 - It __________ the quantity and ___________ cost of sampling and testing

Decreases, decreases

450 - It is ___________ strength and ___________ permeability.

High, low

451 - It is a __________ method.

Nondestructive testing

452 - It is about ___ times the tensile stress determined by the splitting test.

1.5

453 - It is difficult to retain moisture for hydration for RAPID EVAPORATION OF WATER DURING CURING PERIOD.

TRUE

454 - It is observed that 14-34% of the 20 years shrinkage occurs in ________

2 weeks

455 - It is observed that 40-80% of the 20 years shrinkage occurs in _____________

3 months

456 - It is observed that 66-85% of the 20 years shrinkage occurs in _____

1 year

457 - It opens the area of improvement for quality construction rationally based on the documents from __________ projects.

Previous

458 - It opens the area of improvement for quality construction rationally based on the documents from ___________ projects.

Previous

459 - Joints in concrete structures, are provided

all the above.

460 - Large temperature differentials within the concrete member may promote

Cracking

461 - Le Chatelier apparatus consist of ___________

Brass mould

462 - Le-Chatelier's apparatus is used for testing

soundness of cement

463 - Light weight cement content for compressive strength 17.24 MPa is _______ kg/m3.

237-303

464 - Light weight cement content for compressive strength 20.68 MPa is _______ kg/m3.

261-332

465 - Light weight cement content for compressive strength 2500 psi is _______ pounds per cubic yard.

400-510

466 - Light weight cement content for compressive strength 27.58 MPa is _______ kg/m3.

314-392

467 - Light weight cement content for compressive strength 27.58 MPa is _______ kg/m3.

314-392

468 - Light weight cement content for compressive strength 3000 psi is __ pounds per cubic yard.

440-560

469 - Light weight cement content for compressive strength 3000 psi is _______ pounds per cubic yard.

440-560

470 - Light weight cement content for compressive strength 34.47MPa is _______ kg/m3.

373-445

471 - Light weight cement content for compressive strength 4000 psi is _______ pounds per cubic yard.

530-660

472 - Light weight cement content for compressive strength 4000 psi is _______ pounds per cubic yard.

530-660

473 - Light weight cement content for compressive strength 41.37 MPa is _______ kg/m3.

237-303

474 - Light weight cement content for compressive strength 5000 psi is _______ pounds per cubic yard.

630-750

475 - Light weight cement content for compressive strength 6000 psi is _______ pounds per cubic yard.

440-560

476 - Load measuring device shall be capable of measuring loads to an accuracy of ___________

10N

477 - Load measuring device shall be capable of measuring loads to an accuracy of ___________

10N

478 - Log Angles machine is used to test the aggregate for

abrasion resistance

479 - Los Angeles machine consists of circular drum of internal diameter ________ mm and length ________ mm.

700, 520

480 - Loss on Ignition (L.O.I.) is the loss in weight of cement after being heated to ___

1000°C

481 - Loss on Ignition (L.O.I.) is the loss in weight of cement after being heated to _______

1000°C

482 - Loss on Ignition (L.O.I.) is the loss in weight of cement after being heated to _____________

1000°C

483 - Lowering of ____________ might also help, since this would reduce the amount of CH that forms.

C3S

484 - Lowering of ____________ might also help, since this would reduce the amount of CH that forms.

C3S

485 - M 150 grade of concrete approximates

1 : 1 :2 mix

486 - M10 grade of concrete approximates

1 : 3 : 6 mix

487 - Main component in this concrete is _______

Sulphur and aggregates

488 - Maturity methods provide a ___________ simple approach for strength of concrete.

Relatively

489 - Maximum distance between expansion joints in structures as per IS : 456 – 1978 is________________?

45 m

490 - Maximum nominal size of aggregates to be used in concrete may be as large as possible within the limits prescribed by _______

IS 456-2000

491 - Maximum nominal size of aggregates to be used in concrete may be as large as possible within the limits prescribed by __________

IS 456-2000

492 - Maximum percentage reinforcement in case of slabs is limited to___________________?

4

493 - Maximum quantity of water needed per 50 kg of cement for M 15 grade of concrete is_______________?

32 liters

494 - Maximum size of aggregates are used to produce 100MPa compressive strength is __________

10-20 mm

495 - Maximum size of aggregates are used to produce 100MPa compressive strength?

10-20 mm

496 - Maximum size of aggregates are used to produce 70MPa compressive strength is ________

20-30 mm

497 - Maximum size of aggregates are used to produce 70MPa compressive strength?

20-30 mm

498 - Maximum size of aggregates should not be larger than ___________

1/5 the minimum dimension of structural members

499 - Maximum size of aggregates should not be larger than _______________

1/3 the thickness of a slab

500 - Mechanical pulse having an oscillation frequency in range of `_____________

40 kHz to 50 kHz

501 - Mid-range water reducers result in at least _________ %.

8

502 - Minimum grade of concrete to be used in reinforced concrete as per IS:456-1978 is_____________?

M15

503 - Minimum pitch of transverse reinforcement in a column is________________?

lesser of the above three values

504 - Minimum thickness of load bearing RCC wall should be_____________?

100 mm

505 - Minute spherical bubbles of size ranging from ______________ microns.

29342

506 - Modulus of elasticity of steel as per IS : 456-1978 shall be taken as______________?

200kN/mm2

507 - Modulus of rupture of concrete is a measure of_______________?

flexural tensile strength

508 - Most common method of prestressing used for factory production is________________?

Long line method

509 - Most low-density aggregates are ________ in origin.

Volcanic

510 - Most small and common ___ load capacity machines will work for the loads of the materials tested to this specification.

1KN

511 - Natural aggregates comes in which category?

Based on origin

512 - No fines concrete is manufactured by _______

By eliminating no fines materials from normal concrete

513 - No fines concrete is manufactured by _____________

By eliminating no fines materials from normal concrete

514 - No fines concrete is manufactured by _____________

By eliminating no fines materials from normal concrete

515 - Nomenclature of water proofing agent.

KIM

516 - Nomenclature of water proofing agent.

KIM

517 - Non-uniform compaction may cause the concrete

all the above.

518 - Normally prestressing wires are arranged in the_______________?

lower part of the beam

519 - On a grading curve, the gap grading is represented by

a horizontal line

520 - On cooling below 1250oC, C3S decomposes __

Slowly

521 - On cooling below 1250oC, C3S decomposes ______

Slowly

522 - On cooling below 1250oC, C3S decomposes ____________

Slowly

523 - One of the criteria for the effecvve width of flange of T-beam is bf =—+ bw +6Df 6 In above formula, l0 signifies_______________?

distance between points of zero moments in the beam

524 - Ordinary concrete is not used for concrete grade

M 400

525 - Ordinary Portland cement is manufactured from

gypsum and lime

526 - Particles of 0.002 mm size are that of

clay

527 - Percentage of pozzolanic material containing clay upto 80% used for the manufacture of pozzolana cement, is

0.3

528 - Permissible compressive strength of M 150 concrete grade is

150 kg/cm2

529 - Permissible compressive strength of M 200 concrete grade is

200 kg/cm2

530 - Permissible compressive strength of M 200 concrete grade is

200 kg/cm2

531 - Permissible compressive strength of M 300 concrete grade is

300 kg/cm2

532 - Pick up the correct proportions of chemical ingredients of cement

Lime : Silica : Alumina : Iron oxide : 63 : 22 : 6 : 3

533 - Pick up the correct statement from the following i.

All the above.

534 - Pick up the correct statement from the following.

Gypsum acts as a retarders

535 - Pick up the correct statement from the following:

Gypsum in cement decreases the setting time

536 - Pick up the correct statement from the following:

Gypsum in cement decreases the setting time

537 - Pick up the correct statement from the following:

All the above.

538 - Pick up the correct statement from the following:

All the above.

539 - Pick up the correct statement from the following:

Both (a) and (b).

540 - Pick up the correct statement from the following:

All the above.

541 - Pick up the correct statement from the following:

All the above.

542 - Pick up the correct statement from the following:

All the above.

543 - Pick up the correct statement from the following:

None of these.

544 - Pick up the correct statement from the following:

All the above.

545 - Pick up the correct statement from the following:

All the above.

546 - Pick up the correct statement from the following:

All the above.

547 - Pick up the correct statement from the following:

All the above.

548 - Pick up the correct statement from the following:

All the above.

549 - Pick up the correct statement from the following:

Both (c) and (d).

550 - Pick up the correct statement from the following:

All the above.

551 - Pick up the correct statement from the following:

All the above.

552 - Pick up the correct statement from the following:

All the above.

553 - Pick up the correct statement from the following:

All the above.

554 - Pick up the correct statement from the following:

All the above.

555 - Pick up the correct statement from the following:

All the above.

556 - Pick up the correct statement from the following:

All the above.

557 - Pick up the correct statement from the following:

All the above.

558 - Pick up the correct statement from the following:

All the above.

559 - Pick up the incorrect statement applicable to the field test of good cement.

All the above.

560 - Pick up the incorrect statement from the following. While performing preliminary test on concrete

concrete ingredients should be kept at a temperature of 37° ± 2°C

561 - Pick up the incorrect statement from the following:

The mould is in the form of a frustum of hexagonal pyramid

562 - Pick up the incorrect statement from the following:

A rich mix of concrete possesses higher strength than that a lean mix of desired workability with excessive equantity of water

563 - Pick up the incorrect statement from the following:

The phenomenon by virtue of which cement does not allow transmission of sound, is known as soundness of cement

564 - Pick up the incorrect statement from the following:

In single size aggregates, bulk density is maximum

565 - Pick up the incorrect statement from the following:

Admixtures accelerate hydration

566 - Pick up the incorrect statement from the following:

Tricalcium silicate (C3S) has more resistance to sulphate attack

567 - Pick up the incorrect statement from the following:

None of these.

568 - Pick up the incorrect statement from the following:

All the above.

569 - Pick up the incorrect statement from the following:

With passage of time, the strength of cement increases

570 - Pick up the most appropriate statement from the following:

Bulk density of normal weight aggregate is 1600 kg/m3

571 - Pick up the most appropriate statement from the following:

Sp. Gr. =c/(a-b)

572 - Placing of concrete should preferably be done at a temperature of

27 ± 2°C

573 - Plain cement concrete is strong in taking ___________

Compressive stress

574 - Plastic shrinkage cracking occurs in ________ hours after placing.

5

575 - Poisson's ratio for concrete_______________?

increases with richer mixes

576 - Polypropylene fibers is hydrophobic in nature. True or false?

TRUE

577 - Powder epoxy is fusion bonded to bar at about _________ Degree C temperature.

250

578 - Power showed that the strength of concrete bears a specific relationship with the gel/space ratio. He found the relationship to be __________

240x3

579 - Pozzolana cement is used with confidence for construction of

all the above.

580 - Pozzolanic properties exist in

all the above.

581 - Prepacked concrete _________ water proofing concrete.

Is

582 - Presence of acid, alkali ___________

Reduces the strength

583 - Prestress loss due to friction occurs________________?

only in post-tensioned beams

584 - Proper batching ensures

all the above.

585 - Proper proportioning of concrete, ensures

all the above.

586 - Quality control helps to ___________ the risks of overdesign that ___________ the overall cost.

Minimize, Decrease

587 - Quality control helps to ____________ the risks of overdesign that ___________ the overall cost.

Minimize, Decrease

588 - Quality management system _________ perception of customers towards company.

Improves

589 - Quality management system improves perception of customers towards company. True or false

TRUE

590 - Quality of construction activities will be tracked by quality management documents

TRUE

591 - R.R.I. charts are used to obtain a relatioship between strength of concrete and

water cement ratio

592 - Range of modulus of elasticity for UHPC ___________

45-50 GPa

593 - Rapid evaporation may cause plastic shrinkage __________

Plastic shrinkage

594 - Ratio of permissible stress in direct compression and bending compression is______________?

less than 1

595 - Reduction in the volume due to shrinkage causes

Volumetric strain

596 - Reduction in the volume due to shrinkage causes _____

Volumetric strain

597 - Reduction in the volume due to shrinkage causes _________

Volumetric strain

598 - Reduction in the volume due to shrinkage causes __________

Volumetric strain

599 - Reinforced cement concrete is equally strong in taking __________

Tensile, compressive and shear stresses

600 - Residual soils are formed by______________?

none of the above

601 - Retarders are used to:

Offset the accelerating effect of hot weather on the setting of concrete

602 - Retarders used at grouting oil wells, where temperature is about _____________ oC.

200

603 - Ring tensile strength is __________

Inversely proportional to time

604 - Ring test is not the determination for ______________

Compressive strength

605 - Ring test is the determination for ___________

Tensile strength

606 - Rule (ruler/scale), capable of reading the dimensions of test specimens to an accuracy of ________

1mm

607 - S. Sieve Nos. 10 mm and 4.75 mm are geneally used for grading of

both (a) and (b)

608 - S.I. has specified the full strength of concrete after

28 days

609 - S.I. unit of bulk density

kg/l

610 - Sand generally contains salt if it is obtained from:

sea beds

611 - Sand requiring a high water cement ratio, belongs to

Zone I

612 - Sands of zone I are

coarse

613 - Saw dust can be rendered chemically inert by boiling it in water containing

ferrous sulphate

614 - SCC has __________ deformability.

High

615 - SCC has __________ viscosity.

Medium

616 - SCC has __________ yield stress.

Low

617 - SCC has ___________ segregation resistance.

Good

618 - SCC is measured using the

Slump-flow test

619 - Segregation is responsible for

all the above.

620 - Select the correct range of density index,ID ________________?

0 < ID < 1

621 - Select the correct statement?

Elastic modulus of high tensile steel is nearly the same as that of mild steel

622 - Select the correct statement?

Elastic modulus of high tensile steel is nearly the same as that of mild steel

623 - Select the incorrect statement?

none of the above

624 - Select the incorrect statement?

none of the above

625 - Separation of coarse aggregates from mortar during transportation, is known

segregation

626 - Separation of water or water sand cement from a freshly concrete, is known

bleeding

627 - Setting time of cement increases by adding

gypsum

628 - Setting time of cement increases by adding ____________

Gypsum

629 - Shrinkage in concrete can be reduced by using

all the above.

630 - Silica fume is _________

More reactive

631 - Silica fume is ______________

More reactive

632 - Silica fume is usually added during ____________

Concrete production at a concrete plant

633 - Silica in excess causes ____

The cement to set slowly

634 - Silica in excess causes ____

The cement to set slowly

635 - Slower velocities may indicate ___________

Concrete with many voids

636 - Slump test is done for

concrete.

637 - Slump test of concrete is a measure ofits

consistency

638 - Slump test of concrete is a meausre ofits

consistency

639 - Specific Gravity of silica fume.

2.22

640 - Specified compressive strengh of concrete is obtained from cube tests at the end of

28 days.

641 - Spherical particles in silica fume has diameter of _______

<1 μm

642 - Standard consistency of cement is tested by ___________

Vicat apparatus

643 - Static modulus of elasticity of concrete has been related to its

Compressive strength

644 - Static modulus of elasticity of concrete has been related to its ________

Compressive strength

645 - Steel fibers helps in the enhancement of its properties. True or False?

TRUE

646 - Strength of concrete increase with _________

Increase in fineness of cement

647 - Strength of concrete increase with _____________

Decrease with w/c ratio

648 - Strength of concrete is proportional to ______________

Cement water ratio

649 - Strength of concrete show an increase with _________

Increase in rate of loading

650 - Strength of concrete with passage of time

increases

651 - Stress strain curve of high tensile steel_______________?

does not show definite yield point but yield point is defined by 0.2% proof stress

652 - Super plasticizers reduce water requirement by ___________ %.

45290

653 - Symptoms for acid attack?

It will show disintegration of the concrete evidenced by loss of the cement paste

654 - Symptoms for aggressive ACR reaction?

Affected concrete does not exhibit telltale features too distinctly

655 - Symptoms for aggressive ASR?

Expansion does not occur without reaction products

656 - Symptoms for aggressive water attack?

It will show concrete surfaces that are very rough in areas where the paste is leached

657 - Tensile test can be performed on _____________

Universal testing machine

658 - The _________ compressive strength required from structural consideration.

Minimum

659 - The _________ the modulus of elasticity the _________ is the creep.

Higher, less

660 - The __________ compressive strength required from structural consideration.

Minimum

661 - The __________ the aggregate, the ________ is the magnitude of creep.

Stronger, less

662 - The 28 days cube strength of mass concrete using aggregates of maximum size 5 cm for gravity dams should be

Less than 200 kg/cm2

663 - The 28 days cube strength of mass concrete using aggregates of maximum size 5 cm for gravity dams should be

below 200 kg/cm2

664 - The ability of the material to resist stress without failure is called ________________

Strength

665 - The addition of a pozzolanic admixture such as fly ash reduces the

C3A

666 - The addition of a pozzolanic admixture such as fly ash reduces the

C3A

667 - The addition of glass fibers are in the range of __________

0-6%

668 - The addition of the admixture to the mix __________ the surface tension.

Lowers

669 - The addition of the admixture to the mix __________ the surface tension.

Lowers

670 - The adequate workability necessary for _________ compaction with the compacting equipment available.

Full

671 - The adequate workability necessary for ___________ compaction with the compacting equipment available.

Full

672 - The aggregate containing moisture in pores and having its suface dry, is known as

saturated surface dry aggregate

673 - The aggregate crushing value provides a relative measure of a maximum value of 40%age is allowed for WBM base course in Indian conditions.

Aggregates to be used for wearing course, the impact value shouldn’t exceed ________ percent.

674 - The aggregate impact value of the aggregate used in

all the above.

675 - The aim of the designer should always be to get concrete mixtures of optimum strength at __ cement content and ________ workability.

Minimum, acceptable

676 - The average permissible stress in bond for plain bars in tension is_______________?

increased by 25% for bars in compression

677 - The average specific gravity of natural aggregate is:

2.7

678 - The basic requirement for the success of any quality control plan is the availability of experienced, knowledgeable and trained personnel at all the levels. True or False.

TRUE

679 - The blended meal is sieved and fed into a rotating dish called a ___

Granulator

680 - The breaking up of cohesion in a mass of concrete is called ________

Segregation

681 - The bulk density of aggregates does not depend upon :

size and shape of the container

682 - The bulk density of aggregates does not depend upon ____________

Size and shape of the container

683 - The bulk density of aggregates, depends upon

all the above.

684 - The bulk density of aggregates, is generally expressed as

kg/litre

685 - The cement becomes useless if its absorbed moisture content exceeds

0.05

686 - The cement concrete, from which entrained air and excess water are removed after placing it in position, is called ________

Vacuum concrete

687 - The cement concrete, from which entrained air and excess water are removed after placing it in position, is called _________

Vacuum concrete

688 - The cement whose strength is a little lower than the ordinary cement during the first three months but attains afterwards the same strength, is known as

low-heat Portland cement

689 - The choice of cement for high-strength concrete should not be based only on mortar-cube tests but it should also include tests of compressive strengths of concrete at ___________ days.

28, 56, 91

690 - The commercial name of white and coloured cement in India, is

all the above.

691 - The commonly used material in the manufacture of cement is

lime stone

692 - The compaction of concrete, improves

all the above.

693 - The compressive strength of 100 mm cube as compared to 150 mm cube is always_______________?

more

694 - The compressive strength of no fines concrete varies between __________

4-14 MPa

695 - The compressive strength varies from ____________

200-550 kg/cm2

696 - The concrete mix which causes difficulty in obtaining a smooth finish, possess

hardness

697 - The condition not applicable to water cement ratio law, is

concrete specimens may be tested at any temperature

698 - The construction joints in cement concrete ___________

Should not be provided at the corners

699 - The continuous strain, which the concrete undergoes due to application of external loads, is called __________

Creep

700 - The datum temperature for maturity by Plowman, is

- 11.7°C

701 - The density of concrete made with saturated aggregate is ___________

High

702 - The design yield stress of steel according to IS: 456-1978 is_______________?

0.87 fy

703 - The development of first 28 days strength is on account of the hydration of __

C3S

704 - The diameter of the Vicat plunger is 10 mm and its length varies from

40 mm to 50 mm

705 - The diameter of ties in a column should be_______________?

more than 5 mm and also more than one-fourth of diameter of main bar

706 - The dimensions of a 35 litre forma for measuring aggregates by volume, are :

length 27 cm, breadth 27 cm, height 48 cm

707 - The effect of creep on modular ratio is__________________?

to increase it

708 - The entrained air in concrete

increases workability

709 - The exposure of conventional mixing in open bowl is about ___________ ppm in the breathing zone.

10

710 - The factor of safety for______________?

steel is lower than that for concrete

711 - The factor which affects workability, is

all the above.

712 - The final operation of finishing floors, is known as

trowelling

713 - The final operation of finishing the concrete surface is called _____________

Troweling

714 - The fineness modulus of fine aggregate is in the range of______________?

2.0 to 3.5

715 - The flexural strength (or modulus of rupture) is obtained for the first peak load, Pmax as:_______________

Pmax * L/bd2

716 - The following proportion of the ingredients of concrete mix, is not in conformation to arbitrary method of proportioning

31-Dec-1899

717 - The grade of concrete M 150 means that compressive strength of a 15 cm cube after 28 days, is

150 kg/cm2

718 - The grade of concrete not recommended by I.S. : 456, is

M 500

719 - The grain density of the clay powders was measured using _______

Pycnometer

720 - The high strength of rapid hardening cement at early stage, is due to its

increased lime cement

721 - The hydration that provides the initial mix and chemical bond of the concrete’s ingredients is the

First step

722 - The impurity of mixing water which affects the setting time and strength of concrete, is

sodium carbonates and bicarbonates

723 - The increased cohesiveness of concrete, makes it

less liable to segregation

724 - The indenter used in Brinell hardness test is a ____________

Cone

725 - The indenter used in Brinell hardness test is a ________________

Cone

726 - The individual variation between test strength of sample should not be more than______________?

± 15% of average

727 - The interference field near the face of a transducer is often referred to as the ______________

Fresnel zone

728 - The internal dimensions of a ware house are 15 m x 5.6 m, and the maximum height of piles is 2.70 m, the maximum number of bags to be stored in two piles, are

3000 bags

729 - The levelling operation that removes humps and hollows and give a true, uniform concrete surface is called ____________

Screeding

730 - The levelling operation that removes humps and hollows and give a true, uniform concrete surface is called ____________

Screeding

731 - The light weight aggregates are obtained from

Volcanic source

732 - The light weight aggregates are obtained from

volcanic source.

733 - The light-weight concrete is prepared by ________

Using coke-breeze, slag as aggregate in the concrete

734 - The light-weight concrete is prepared by ____________

Using coke-breeze, slag as aggregate in the concrete

735 - The light-weight concrete is prepared by ____________

Using coke-breeze, cinder or slag as aggregate in the concrete

736 - The limits of percentage p of the longitudinal reinforce-ment in a column is given by_____________?

0.8% to 6%

737 - The load carrying capacity of a helically reinforced column as compared to that of a tied column is about________________?

5% more

738 - The loss in weight should not exceed __ % when tested with Na2SO4 and __ % with MgSO4 solution.

12, 18

739 - The loss in weight should not exceed __ percent when tested with sodium sulphate and __ percent with magnesium sulphate solution.

12, 18

740 - The loss in weight should not exceed __ percent when tested with sodium sulphate and __ percent with magnesium sulphate solution.

12, 18

741 - The loss in weight should not exceed ______ percent when tested with sodium sulphate and ______ percent with magnesium sulphate solution.

12, 18

742 - The loss in weight should not exceed ______________ percent when tested with sodium sulphate and ________ percent with magnesium sulphate solution.

12, 18

743 - The lower the w/c ratio, ________ the strength of concrete

Higher

744 - The lower water cement ratio in concrete, introduces

all the above.

745 - The magnitude of autogenous shrinkage is ________

0.01

746 - The main object of compaction of concrete, is:

all the above.

747 - The main reason for providing number of reinforcing bars at a support in a simply supported beam is to resist in that zone_________________?

bond stress

748 - The material used for UHPC provides compressive strengths up to

29000 psi

749 - The material used for UHPC provides compressive strengths up to __________

29000 psi

750 - The material used for UHPC provides flexural strengths up to _________

7000 psi

751 - The maturity method is a ___________ approach to predict the early age strength gain of concrete.

Convenient

752 - The maximum amount of dust which may be permitted in aggregates is

all the above.

753 - The maximum percentage of chemical ingredient of cement is that of

lime

754 - The maximum thickness of concrete floor of a cement warehouse, is

25 cm

755 - The maximum value of hoop compression in a dome is given by___________________?

wR/2d

756 - The mineral oil if present in mixing for concrete

Improves strength

757 - The mineral oil if present in mixing for concrete ______________

Improves strength

758 - The minimum cover to the ties or spirals should not be less than________________?

25 mm

759 - The minimum diameter of longitudinal bars in a column is________________?

12 mm

760 - The minimum percentage of chemical ingredient of cement is that of

magnesium oxide

761 - The minimum water to cement ratio for cement concrete to hydrate is ___

0.38

762 - The mixture of different ingredients of cement, is burnt at

1400°C

763 - The moisture content of the aggregate shall not exceed from ____________

.1% – .5%

764 - The most useless aggregate is one whose surface texture is

glassy

765 - The number of cylces per second is the definition of ____________

Hertz

766 - The operation of removing humps and hollows of uniform concrete surface, is known as

screeding

767 - The percentage of the aggregate of F.M. 2.6 to be combined with coarse aggregate of F.M. 6.8 for obtaining the aggregates of F.M. 5.4, is

0.5

768 - The percentage of voids in cement is approximately_______________?

0.4

769 - The permissible diagonal tensile stress in reinforced brick work is_____________?

about 0.1 N/mm2

770 - The philosophy of prescribing low ____________ cement to improve resistance to sulphate attack.

C3A

771 - The philosophy of prescribing low ____________ cement to improve resistance to sulphate attack.

C3A

772 - The preliminary test is repeated if the difference of compressive strength of three test specimens, exceeds

15 kg/cm2

773 - The process of hardening the concrete by keeping its surface moist is known

curing

774 - The process of hardening the concrete mixes by keeping its surface moist for a certain period is called ____________

Curing

775 - The process of mixing, transporting, placing and compacting concrete using Ordinary Port land Cement should not take more than

30 minutes

776 - The process of proper and accurate measurement of concrete ingredients for uniformity of proportion, is known

batching

777 - The process of removing the irregularities from the surface of concrete left after screeding is called floating.

TRUE

778 - The produce impermeable concrete

all the above.

779 - The property of a material that resists penetration or indentation by means of abrasion or scratching is known as ___________

Hardness

780 - The property of a material that resists penetration or indentation by means of abrasion or scratching is known as ____________

Hardness

781 - The property of fresh concrete, in which the water in the mix tends to rise to the surface while placing and compacting, is called________________?

bleeding

782 - The purpose of reinforcement in prestressed concrete is________________?

to impart initial compressive stress in concrete

783 - The quality of concrete, specifically a ____________ cement content, is the best protection against sulphate attack.

High

784 - The quality of concrete, specifically a ____________ cement content, is the best protection against sulphate attack.

High

785 - The quality of concrete, specifically a ____________ permeability, is the best protection against sulphate attack.

Low

786 - The quality of concrete, specifically a ____________ permeability, is the best protection against sulphate attack.

Low

787 - The quality of concrete, specifically a ____________ w/c ratio, is the best protection against sulphate attack.

Low

788 - The quality of concrete, specifically a ____________ w/c ratio, is the best protection against sulphate attack.

Low

789 - The range of the density for this concrete is ___________

3400-5600 kg/cu m

790 - The rate of creep generally ____ with the ____ of the size of aggregates.

Increase, decrease

791 - The rate of creep generally _________ with the _________ of the size of aggregates.

Increase, decrease

792 - The rate of creep generally ____________ with the ____________ of the size of aggregates.

Increase, decrease

793 - The rate of creep rapidly ________ with time.

Decrease

794 - The rate of creep rapidly _________ with time.

Decrease

795 - The rate of creep rapidly ___________ with time.

Decrease

796 - The ratio of the length to breadth of a wooden float, is

7.5

797 - The ratio of the mass of the aggregate dried in an oven at ___________ for 24 hours to the mass of the water occupying a volume equal to that of solid.

100-110oC

798 - The raw materials is so hard (solid) that they ___ disintegrate by water.

do not

799 - The recommended value of modular ratio for reinforced brick work is______________?

40

800 - The relative humidity of laboratory should be ___________ for standard consistency.

65 ± 5%

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