McqMate
| 601. |
Gypsum is added in the manufacture of Portland cement |
| A. | while mixing the raw materials |
| B. | during burning in the rotary kiln |
| C. | at the beginning of grinding the clinker |
| D. | at the end of grinding the clinker into powder |
| Answer» D. at the end of grinding the clinker into powder | |
| 602. |
The constituent in lime which retard the slaking action and increase the rapidity of setting, is |
| A. | silica |
| B. | sulphate |
| C. | alkalies |
| D. | alumina |
| Answer» A. silica | |
| 603. |
For R.C.C. construction, the maximum size of coarse aggregate is limited to |
| A. | 10 mm |
| B. | 15 mm |
| C. | 20 mm |
| D. | 25 mm |
| Answer» D. 25 mm | |
| 604. |
Which of the following statement is correct? |
| A. | The fat lime swells two to three times of its original volume during slaking. |
| B. | The poor lime is of pure white colour. |
| C. | The feebly hydraulic lime slakes sluggishly. |
| D. | all of the above |
| Answer» A. The fat lime swells two to three times of its original volume during slaking. | |
| 605. |
The dolomite bricks are |
| A. | ordinary bricks |
| B. | acid refractory bricks |
| C. | basic refractory bricks |
| D. | neutral refractory bricks |
| Answer» C. basic refractory bricks | |
| 606. |
According to Indian standard specifications, the full strength of concrete is achieved after |
| A. | 7 days |
| B. | 14 days |
| C. | 21 days |
| D. | 28 days |
| Answer» D. 28 days | |
| 607. |
Igeous rock has |
| A. | crystalline, glossy or fused texture |
| B. | foliated structure which is hard and durable |
| C. | layers of different composition, colour and structure |
| D. | none of the above |
| Answer» A. crystalline, glossy or fused texture | |
| 608. |
Poor or lean lime |
| A. | slakes rapidly with considerable evolution of heat |
| B. | takes very long time to develop adequate strength |
| C. | has high plasticity |
| D. | none of the above |
| Answer» D. none of the above | |
| 609. |
The workability of cement concrete can be improved by |
| A. | increasing the quantity of cement |
| B. | increasing the proportion of coarse aggregate |
| C. | increasing the quantity of sand |
| D. | all of the above |
| Answer» A. increasing the quantity of cement | |
| 610. |
The liquid medium used in oil paints is |
| A. | thinner |
| B. | alcohol |
| C. | linseed oil |
| D. | turpentine |
| Answer» C. linseed oil | |
| 611. |
The good clay for making bricks is |
| A. | unweathered clay |
| B. | weathered clay |
| C. | silted soil |
| D. | black cotton soil |
| Answer» B. weathered clay | |
| 612. |
The strength of timber is maximum in the direction |
| A. | parallel |
| B. | perpendicular |
| Answer» A. parallel | |
| 613. |
The liquid medium used in enamel paints is |
| A. | thinner |
| B. | alcohol |
| C. | turpentine |
| D. | varnish |
| Answer» D. varnish | |
| 614. |
Granite is an example of |
| A. | aqueous rocks |
| B. | sedimentary rocks |
| C. | metamorphic rocks |
| D. | igneous rocks |
| Answer» D. igneous rocks | |
| 615. |
The sand is mixed with lime mortar to |
| A. | reduce cost |
| B. | reduce setting time |
| C. | improve strength |
| D. | prevent shrinkage and cracking |
| Answer» D. prevent shrinkage and cracking | |
| 616. |
Bituminous paint consists of bitumen dissolved in |
| A. | spirit |
| B. | naptha |
| C. | linseed oil |
| D. | either (a) or (b) |
| Answer» D. either (a) or (b) | |
| 617. |
The colour of brick depends upon the amount of iron oxide present in the clay. |
| A. | Correct |
| B. | Incorrect |
| Answer» A. Correct | |
| 618. |
The bricks should be burnt at temperature from |
| A. | 300?C to 500?C |
| B. | 500?C to 700?C |
| C. | 700?C to 1000?C |
| D. | 1000?C to 1200?C |
| Answer» D. 1000?C to 1200?C | |
| 619. |
The principal constituent of every kind of brick earth is alumina. |
| A. | True |
| B. | False |
| Answer» A. True | |
| 620. |
The thickness of lamin boards vary from |
| A. | 5 to 12 mm |
| B. | 12 to 15 mm |
| C. | 12 to 25 mm |
| D. | 25 to 30 mm |
| Answer» C. 12 to 25 mm | |
| 621. |
The purpose of seasoning of timber is to |
| A. | change the direction of grains |
| B. | remove voids |
| C. | reduce moisture content |
| D. | all of these |
| Answer» C. reduce moisture content | |
| 622. |
Rich or fat lime |
| A. | slakes rapidly with considerable evolution of heat |
| B. | takes very long time to develop adequate strength |
| C. | has high plasticity |
| D. | all of these |
| Answer» D. all of these | |
| 623. |
Le-chatelier method is used to determine |
| A. | initial setting of cement |
| B. | fineness of cement |
| C. | soundness of cement |
| D. | normal consistency of cement |
| Answer» C. soundness of cement | |
| 624. |
The fuel generally used for burning limestone is |
| A. | coal |
| B. | charcoal |
| C. | firewood |
| D. | any one of these |
| Answer» D. any one of these | |
| 625. |
The specific gravity of sandstone is |
| A. | 1.1 to 1.8 |
| B. | 1.8 to 2.65 |
| C. | 2.65 to 2.95 |
| D. | 2.95 to 3.4 |
| Answer» C. 2.65 to 2.95 | |
| 626. |
The commonly used cement in cement paints is |
| A. | white cement |
| B. | Portland cement |
| C. | alumina cement |
| D. | rapid hardening cement |
| Answer» A. white cement | |
| 627. |
The most powerful explosive used in blasting is |
| A. | blasting power |
| B. | dynamite |
| C. | gun cotton |
| D. | cordite |
| Answer» C. gun cotton | |
| 628. |
The quarrying of stone by the method of wedging is successfully carried out in |
| A. | sandstones |
| B. | limestones |
| C. | marbles |
| D. | all of these |
| Answer» D. all of these | |
| 629. |
The indentation marks left on bricks during the process of moulding, are known as |
| A. | fillets |
| B. | frogs |
| C. | projections |
| D. | marks |
| Answer» B. frogs | |
| 630. |
Efflorescence is caused if |
| A. | the alkaline salt is present in the bricks |
| B. | the clay used for making bricks contain pyrite |
| C. | the water used for pugging the clay contains gypsum |
| D. | all of the above |
| Answer» D. all of the above | |
| 631. |
The moisture content in timber for framework should not exceed |
| A. | 5% |
| B. | 10% |
| C. | 15% |
| D. | 20% |
| Answer» C. 15% | |
| 632. |
The strength of white cement is |
| A. | equal to |
| B. | less than |
| C. | greater than |
| Answer» B. less than | |
| 633. |
The thinner used for oil paints is |
| A. | water |
| B. | turpentine |
| C. | carbon tetrachloride |
| D. | any one of these |
| Answer» B. turpentine | |
| 634. |
The bitumen paints are used for providing |
| A. | rough |
| B. | smooth |
| C. | protective |
| Answer» C. protective | |
| 635. |
The slump test of concrete is used to measure its |
| A. | consistency |
| B. | tensile and compressive strength |
| C. | impact value |
| D. | homogeneity |
| Answer» A. consistency | |
| 636. |
The bulking of sand |
| A. | increases |
| B. | decreases |
| Answer» A. increases | |
| 637. |
The percentage of silica in a good brick clay should vary from |
| A. | 20 to 30% |
| B. | 30 to 40% |
| C. | 40 to 50% |
| D. | 50 to 60% |
| Answer» D. 50 to 60% | |
| 638. |
The sedimentary rocks are formed due to |
| A. | solidification of molten mass lying below or above the earth surface |
| B. | gradual deposition of materials like sand, clay, etc., generally by setting water |
| C. | alteration of original structure under heat and excessive pressure |
| D. | none of the above |
| Answer» B. gradual deposition of materials like sand, clay, etc., generally by setting water | |
| 639. |
In order to dry the quarry sap of a freshly quarried slone, it should be exposed to open air for a period of |
| A. | one month |
| B. | four months |
| C. | six to twelve months |
| D. | two years |
| Answer» C. six to twelve months | |
| 640. |
The metallic oxide used in the form of powder in a paint is called |
| A. | extender |
| B. | base |
| C. | vehicle |
| D. | drier |
| Answer» B. base | |
| 641. |
A first class brick should not absorb water more than |
| A. | 10% |
| B. | 15% |
| C. | 20% |
| D. | 25% |
| Answer» C. 20% | |
| 642. |
The colour of granite is |
| A. | grey |
| B. | green |
| C. | brown |
| D. | all of these |
| Answer» D. all of these | |
| 643. |
The stone used for the construction of curved or ornamental work should be soft. |
| A. | Right |
| B. | Wrong |
| Answer» A. Right | |
| 644. |
Moorum is a decomposed laterite and has deep brown or red colour. |
| A. | Yes |
| B. | No |
| Answer» A. Yes | |
| 645. |
The rocks formed due to alteration of original structure under heat and excessive pressure are called metamorphic rocks. |
| A. | Agree |
| B. | Disagree |
| Answer» A. Agree | |
| 646. |
The silica in Portland cement should be |
| A. | 10 to 20% |
| B. | 20 to 25% |
| C. | 25 to 40% |
| D. | 40 to 60% |
| Answer» B. 20 to 25% | |
| 647. |
Excess pf alumina in the clay |
| A. | makes the brick brittle and weak |
| B. | makes the brick crack and warp on drying |
| C. | changes colour of the brick from red to yellow |
| D. | improves impermeability and durability of the brick |
| Answer» B. makes the brick crack and warp on drying | |
| 648. |
The final setting time of ordinary cement should not be more than |
| A. | 2 hours |
| B. | 4 hours |
| C. | 8 hours |
| D. | 10 hours |
| Answer» D. 10 hours | |
| 649. |
The brick earth is derived by the disintegration of |
| A. | igneous |
| B. | metamorphic |
| Answer» A. igneous | |
| 650. |
The central part of a tree is called |
| A. | heart wood |
| B. | pith |
| C. | sap wood |
| D. | cambium layer |
| Answer» B. pith | |
| 651. |
Which of the following is an example of silicious rock? |
| A. | Granite |
| B. | Gneiss |
| C. | Quartzite |
| D. | all of these |
| Answer» D. all of these | |
| 652. |
During the process of burning limestone, clay forms certain compound which |
| A. | gives hydraulic lime |
| B. | gives power of quick setting |
| C. | does not allow to be dissolved in the outside water when used in damp situations |
| D. | all of the above |
| Answer» D. all of the above | |
| 653. |
The clinker is formed at a temperature of |
| A. | 500?C |
| B. | 1000?C |
| C. | 1200?C |
| D. | 1500?C |
| Answer» D. 1500?C | |
| 654. |
The ultimate strength of cement is provided by |
| A. | silica |
| B. | di-calcium silicate |
| C. | tri-calcium silicate |
| D. | tri-calcium aluminate |
| Answer» B. di-calcium silicate | |
| 655. |
The slaking of moderately hydraulic lime is scarcely noticeable. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 656. |
The durability of concrete is proportional to |
| A. | sand content |
| B. | water-cement ratio |
| C. | cement-aggregate ratio |
| D. | aggregate-water ratio |
| Answer» C. cement-aggregate ratio | |
| 657. |
The rate of hydration and hydrolysis of cement depends upon its |
| A. | soundness |
| B. | fineness |
| C. | setting time |
| D. | tensile strength |
| Answer» B. fineness | |
| 658. |
The expansion of cement should not exceed |
| A. | 5 mm |
| B. | 10 mm |
| C. | 15 mm |
| D. | 20 mm |
| Answer» B. 10 mm | |
| 659. |
Distemper is used on |
| A. | brick walls |
| B. | concrete surfaces |
| C. | plastered surfaces exposed to weather |
| D. | plastered surfaces not exposed to weather |
| Answer» D. plastered surfaces not exposed to weather | |
| 660. |
Slate in the form of tiles is used |
| A. | for paving |
| B. | as road metal |
| C. | as an excellent roof covering material |
| D. | for the manufacture of cement |
| Answer» C. as an excellent roof covering material | |
| 661. |
A good Portland cement when tested for fineness, the percentage of residue left after sieving in 90 micron IS sieve should not exceed 10 percent. |
| A. | True |
| B. | False |
| Answer» A. True | |
| 662. |
Lime is used |
| A. | as a matrix for concrete |
| B. | for plastering walls, ceilings etc. |
| C. | for improving soil for agricultural purposes |
| D. | all of the above |
| Answer» D. all of the above | |
| 663. |
For the construction of retaining walls, a |
| A. | soft |
| B. | hard |
| C. | heavy |
| Answer» C. heavy | |
| 664. |
Quick lime is a |
| A. | carbonate of lime |
| B. | oxide of calcium |
| C. | product left immediately after the calcination of pure limestone |
| D. | lime quickly treated with water |
| Answer» C. product left immediately after the calcination of pure limestone | |
| 665. |
Enamel paint is made by adding |
| A. | white lead in varnish |
| B. | bitumen in varnish |
| C. | white lead in lacquer |
| D. | zinc white in spirit |
| Answer» A. white lead in varnish | |
| 666. |
Jhama bricks are |
| A. | well burnt having smooth and even surface |
| B. | slightly over burnt having rough surface |
| C. | under burnt and can be easily broken |
| D. | over burnt with irregular shape |
| Answer» D. over burnt with irregular shape | |
| 667. |
The pigment in paints is mixed to give desired |
| A. | smoothness |
| B. | colour |
| C. | appearance |
| D. | durability |
| Answer» B. colour | |
| 668. |
Granite is mainly composed of |
| A. | quartz and mica |
| B. | felspar and mica |
| C. | quartz and felspar |
| D. | quartz, felspar and mica |
| Answer» D. quartz, felspar and mica | |
| 669. |
The coefficient of linear expansion of concrete is almost the same as that of steel. |
| A. | Correct |
| B. | Incorrect |
| Answer» A. Correct | |
| 670. |
For one cubic metre of brick masonry, the number of bricks required are |
| A. | 400 |
| B. | 450 |
| C. | 500 |
| D. | 550 |
| Answer» D. 550 | |
| 671. |
The defect caused by imperfect seasoning, is called |
| A. | wet rot |
| B. | dry rot |
| C. | honeycombing |
| D. | cup shake |
| Answer» C. honeycombing | |
| 672. |
A good quality cement should have higher percentage of |
| A. | silica |
| B. | free lime |
| C. | di-calcium silicate |
| D. | tri-calcium silicate |
| Answer» D. tri-calcium silicate | |
| 673. |
The compressive strength of perforated bricks should not be less than |
| A. | 4 MN/m2 |
| B. | 5 MN/m2 |
| C. | 6 MN/m2 |
| D. | 7 MN/m2 |
| Answer» D. 7 MN/m2 | |
| 674. |
The average out-turn of first class bricks in kiln burning is |
| A. | 50 to 60% |
| B. | 60 to 70% |
| C. | 70 to 80% |
| D. | 80 to 90% |
| Answer» D. 80 to 90% | |
| 675. |
Gneiss is chemically classified as |
| A. | calcareous rock |
| B. | argillaceous rock |
| C. | silicious rock |
| D. | none of these |
| Answer» C. silicious rock | |
| 676. |
The chief ingredient of a paint is |
| A. | alcohol |
| B. | drier |
| C. | oil |
| D. | pigment |
| Answer» D. pigment | |
| 677. |
The setting and hardening of cement paste is mainly due to the hydration and hydrolysis of |
| A. | tri-calcium silicate |
| B. | di-calcium silicate |
| C. | tri-calcium aluminate |
| D. | all of these |
| Answer» D. all of these | |
| 678. |
The process of adding the required quantity of water to quick lime in order to convert it into hydrated lime, is known as |
| A. | calcination |
| B. | hydration |
| C. | slaking |
| D. | quenching |
| Answer» C. slaking | |
| 679. |
The fineness of cement is tested by |
| A. | air-permeability method |
| B. | Le-chatelier method |
| C. | Vicat's apparatus |
| D. | all of these |
| Answer» A. air-permeability method | |
| 680. |
The standard size of a masonry brick is 20 cm x 10 cm x 10 cm |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 681. |
Which of the following statement is correct? |
| A. | The sand used for making mortar should be fine. |
| B. | The rounded grains of sand produce a strong mortar. |
| C. | The mortar made with coarse sand is stronger than the one made with fine stand. |
| D. | all of the above |
| Answer» C. The mortar made with coarse sand is stronger than the one made with fine stand. | |
| 682. |
When quarrying is to be done in hard stone and compact rocks, the usual method of quarrying is |
| A. | by wedging |
| B. | by channelling machine |
| C. | by blasting |
| D. | all of these |
| Answer» C. by blasting | |
| 683. |
The soundness of cement is tested by |
| A. | air permeability method |
| B. | Le-chatelier method |
| C. | Vicat's apparatus |
| D. | all of these |
| Answer» B. Le-chatelier method | |
| 684. |
The wood generally used for railway sleepers is |
| A. | mango |
| B. | kail |
| C. | babul |
| D. | deodar |
| Answer» B. kail | |
| 685. |
Which of the following statement is correct? |
| A. | Stains used as paints have synthetic pigments. |
| B. | Stucco paints contain polyvinyl acetate. |
| C. | The solvent used in distempers is turpentine. |
| D. | all of the above |
| Answer» B. Stucco paints contain polyvinyl acetate. | |
| 686. |
Gun cotton is made by saturating cotton with nitric acid. |
| A. | Agree |
| B. | Disagree |
| Answer» A. Agree | |
| 687. |
The maximum water-cement ratio for durable concrete is |
| A. | 0.2 |
| B. | 0.4 |
| C. | 0.6 |
| D. | 0.8 |
| Answer» D. 0.8 | |
| 688. |
According to Indian standard specifications, the concrete should be cured under a humidity of |
| A. | 30% |
| B. | 50% |
| C. | 70% |
| D. | 90% |
| Answer» D. 90% | |
| 689. |
The durability of cement concrete is usually improved by |
| A. | increasing the quantity of coarse sand |
| B. | increasing the quantity of cement |
| C. | decreasing the water-cement ratio |
| D. | decreasing the proportion of fine aggregate |
| Answer» B. increasing the quantity of cement | |
| 690. |
The specific gravity of stone should not, in any case be less than |
| A. | 1 |
| B. | 1.5 |
| C. | 2 |
| D. | 2.5 |
| Answer» D. 2.5 | |
| 691. |
The burning of bricks in kilns is complete within |
| A. | 12 |
| B. | 24 |
| C. | 48 |
| D. | 96 |
| Answer» B. 24 | |
| 692. |
A fine-grained granite |
| A. | offers higher resistance to weathering |
| B. | can be easily polished and worked |
| C. | is used for exterior facing of buildings |
| D. | all of these |
| Answer» D. all of these | |
| 693. |
Excess of silica in the clay |
| A. | makes the brick brittle and weak |
| B. | makes the brick crack and wrap on drying |
| C. | changes the colour of the brick from red to yellow |
| D. | improves impermeability and durability of the brick |
| Answer» A. makes the brick brittle and weak | |
| 694. |
For railway ballast, the stone should be |
| A. | soft with a uniform texture |
| B. | hard, heavy, strong and durable |
| C. | hard, tough, resistant to abrasion and durable |
| D. | hard, dense, durable, tough and easily workable |
| Answer» D. hard, dense, durable, tough and easily workable | |
| 695. |
The crushing strength of a stone depends upon its |
| A. | texture |
| B. | specific gravity |
| C. | workability |
| D. | both (a) and (b) |
| Answer» D. both (a) and (b) | |
| 696. |
The strength of cement concrete is directly proportional to cement-water ratio. |
| A. | Agree |
| B. | Disagree |
| Answer» A. Agree | |
| 697. |
Lime occurs in a free state in nature. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 698. |
The best primer used for structural steel work is |
| A. | white lead |
| B. | red lead |
| C. | zinc oxide |
| D. | iron oxide |
| Answer» B. red lead | |
| 699. |
The size of mould for bricks should be |
| A. | equal to |
| B. | smaller than |
| C. | larger than |
| Answer» C. larger than | |
| 700. |
The paint which has high reflective property is |
| A. | cellulose paint |
| B. | casein paint |
| C. | bronze paint |
| D. | enamel paint |
| Answer» C. bronze paint | |
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