Q.1

Calcination of iron ores is done

  • to remove moisture
  • to remove carbonic acid
  • by roasting in heaps
  • after dressing
  • all the above.
Q.2

Invar contains

  • 12% of nickel
  • 24% of nickel
  • 30% to nickel
  • 36% of nickel.
Q.3

The kiln which may work throughout the year, is

  • Clamp
  • Bull's kiln
  • Hoffman's kiln
  • none of these.
Q.4

The commonly used thinner in oil paints, is

  • naptha
  • turpentine
  • both (a) and (b)
  • neither (a) nor (b)
  • none the these.
Q.5

The main ingredient of a good quality brick earth, is

  • magnesia
  • lime
  • silica
  • alumina.
Q.6

Generally wooden moulds are made from

  • ply wood
  • shisham wood
  • deodar wood
  • teak wood
  • hard wood.
Q.7

Lime stone is not a

  • sedimentary rock
  • stratified rock
  • aqueous rock
  • metamorphic rock.
Q.8

Second class bricks

  • are of dark brown colour
  • produce a metallic sound when struck
  • are well burnt
  • are under burnt.
Q.9

The sequence of refractory materials according to increasing melting points is :

  • Dolomite, Magnesia, Bauxite, Chromite
  • Bauxite, Chromite, Dolomite, Magnesia
  • Magnesia, Bauxite, Dolomite, Chromite.
Q.10

Seasoning of timber is essential to remove

  • knots from timber
  • sap from timber
  • twisted fibre from timber
  • roughness of timber.
Q.11

The melting point of silica is :

  • 1570°C
  • 1630°C
  • 1730°C
  • 1850°C.
Q.12

The portion of a brick cut to form angles other than right angles in plan, is known as

  • queen closer
  • king closer
  • closer
  • squint brick.
Q.13

In stone masonry, stones (stratified rocks) are so placed that the direction of pressure to the plane of bedding is

  • right angles
  • 45°
  • 60°
  • parallel
  • None of these.
Q.14

In a rock calcium carbonate predominates. State whether it is :

  • Sillicious rock
  • Argillaceous rock
  • Calcareous rock
  • None of these.
Q.15

Strength of cement concrete primarily depends upon

  • quality of water
  • quantity of aggregate
  • quantity of cement
  • water-cement ratio.
Q.16

Based on flow quality, the sequence of pipes is

  • A.C. pipes, G.I. pipes, C.I. pipes, PVC pipes
  • C.I. pipes, G.I. pipes, A.C. pipes, PVC pipes
  • C.I. pipes, G.I. pipes, PVC pipes, A.C. pipes
  • None of these.
Q.17

The minimum compressive strength of 1st class bricks should be

  • 75 kg/cm2
  • 90 kg/cm2
  • 100 kg/cm2
  • 120 kg/cm2
  • 130 kg/cm2.
Q.18

Bitumen is generally obtained from

  • organic material
  • synthetic material
  • petroleum product
  • coal.
Q.19

Wrought iron contains carbon about

  • 1.5% to 5.5%
  • 0.5% to 1.75%
  • 0.1% to 0.25%
  • none to these.
Q.20

The size of modular bricks, is

  • 10 x 10 x 9 cm
  • 19 x 9 x 9 cm
  • 22.5 x 10 x 8.5 cm
  • 22.5 x 8.0 x 9 cm.
Q.21

A piece of timber whose thickness and width are respectively 5 cm andcm is called

  • slate
  • plank
  • board
  • strip.
Q.22

Pick up the correct statement from the following:

  • The low voltage porcelain is prepared by wet process
  • The high voltage porcelain is prepared by dry process
  • The low voltage porcelain is prepared by dry process
  • None of the above.
Q.23

Veneering means

  • carving out designs on timber planks
  • chemically treating timber planks
  • thick layer of superior wood glued to inferior wood
  • thin layer of superior wood glued to inferior wood.
Q.24

Pick up the correct statement from the following:

  • Slaked lime contains calcium hydroxide
  • Quick lime contains calcium oxide
  • Slaked lime may be obtained from quick lime
  • Slaked lime is obtained by adding water to quick lime
  • All the above.
Q.25

Plywood is obtained by gluing wooden sheets at

  • 100 to 150 N/cm2
  • 100 to 130°C
  • both (a) and (b)
  • Neither (a) nor (b).
Q.26

The most durable varnish is

  • water varnish
  • spirit varnish
  • turpentine varnish
  • oil varnish
  • none of these.
Q.27

In order of increasing percentage of silica, the correct sequence is

  • sandy clay, calcareous clay, pure clay
  • calcareous clay, pure clay, sandy clay
  • pure clay, sandy clay, calcareous clay
  • None of these.
Q.28

Rapid hardening cement contains

  • Tri-calcium silicate
  • Tri-calcium aluminate
  • Tetra-calcium alumino-ferrite
  • Dicalcium silicate.
Q.29

Bitumen emulsion is

  • a liquid containing bitumen in suspension
  • a paint
  • used as anti-corrosive paint
  • all the above.
Q.30

A volatile substance added to a paint to make its application easy and smooth, is known as

  • base
  • solvent
  • vehicle
  • none to these.
Q.31

For one cubic metre of brick masonry, number of bricks required, is

  • 400
  • 425
  • 450
  • 500
  • 550.
Q.32

Gniess is obtained from

  • igneous rocks
  • metamorphic rocks
  • sedimentary rocks
  • sedimentary metamorphic rocks.
Q.33

Ultimate strength to cement is provided by

  • Tricalcium silicate
  • Di-calcium silicate
  • Tri-calcium aluminate
  • Tetra calcium alumino ferrite.
Q.34

The commonly used colour pigment in paints, is

  • ambers
  • carbon black
  • iron oxide
  • lamp black
  • all the above.
Q.35

The initial setting time of lime-pozzolana, is

  • 30 minutes
  • 60 minutes
  • 90 minutes
  • 120 minutes.
Q.36

The main constituent of fly-ash, is

  • aluminium oxide
  • silica
  • ferrous oxide
  • All of these.
Q.37

Bitumen in

  • solid state, is called asphalt
  • semi fluid state, is called mineral tar
  • fluid state, is called petroleum
  • all the above.
Q.38

Pig iron is manufactured from the ores by

  • dressing
  • calcination and roasting
  • smelting
  • all the above.
Q.39

Pick up the correct statement from the following:

  • Adding 5% to 6% of moisture content by weight, increases the volume of dry sand from 18% to 38%
  • The bulking of fine sand is more than that of coarse sand
  • If the percentage content of moisture exceeds 10%, increase in bulk of sand starts increasing
  • The volume of fully saturated sand equals that of dry sand
  • All the above.
Q.40

Softer variety of steel may be obtained by

  • Cementation process
  • crucible process
  • Bessemer process
  • Open hearth process.
Q.41

The rocks which are formed due to pouring of magma at the earth's surface are called

  • Plutonic rocks
  • Hypabyssal rocks
  • Volcanic rocks
  • Igneous rocks
Q.42

For filling cracks in masonry structures, the type of bitumen used, is

  • cut-back bitumen
  • bitumen-emulsion
  • blown bitumen
  • plastic bitumen.
Q.43

Sand stone is

  • sedimentary rock
  • metamorphic rock
  • igneous rock
  • volcanic rock.
Q.44

Good quality stones must

  • be durable
  • be free from clay
  • resist action of acids
  • all the above.
Q.45

Which one of the following is acid resistant asbestos:

  • actinolite asbestos
  • amosite asbestos
  • anthophylite asbestos
  • crocidolite asbestos
  • All the above.
Q.46

The rocks formed by gradual deposition, are called

  • sedimentary rocks
  • igneous rocks
  • metamorphic rocks
  • none of these.
Q.47

Elastomers can extend upto

  • five times their original dimensions
  • seven times their original dimensions
  • ten times their original dimensions
  • three times their original dimensions.
Q.48

Varnish is a transparent or semi-transparent solution of resinuous substances in

  • alcohol
  • linseed
  • turpentine
  • all the above.
Q.49

The clay to be used for manufacturing bricks for a large project, is dugout and allowed to weather throughout

  • the monsoon
  • the winter
  • the summer
  • none of these.
Q.50

The plastics made from cellulose resin

  • are as clear as glass
  • are tough and strong
  • possess excellent electrical properties
  • All the above.
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