Q.1

For lime concrete,

  • slump is 50 to 75 mm
  • flexural strength at 90 days is 0.2 N/mm2
  • compressive strength at 90 days is 1.5 N/mm2
  • compressive strength at 26 days is 1.2 N/mm2
  • all the above.
Q.2

Lime mortar is generally made with

  • quick lime
  • fat lime
  • hydraulic lime
  • plain lime
  • none of these.
Q.3

Laterite is a/an

  • volcanic rock
  • argillaceous rock
  • calcareous rock
  • silicious rock.
Q.4

The softest rock is

  • marble
  • diamond
  • talc
  • quartz.
Q.5

For obtaining vinyl chloride acetate, the method used, is

  • addition polymerization
  • condensation polymerization
  • co-polymerization
  • none of these.
Q.6

The PVC doors and windows are preferred as they are

  • rust proof
  • rot proof
  • termile proof
  • water proof
  • all of these.
Q.7

Pig iron made from heamatite ores free from sulphur, phosphorus and copper, is known as

  • Bessemer pig
  • Grey or foundry pig
  • White or forge pig
  • Mottled pig
  • All the above.
Q.8

Duco paints are

  • plastic paints
  • cellulose paints
  • emulsion paints
  • bituminous paints
  • oil paints.
Q.9

A stone is rejected if it absorbs water more than

  • 5%
  • 10%
  • 15%
  • 20%
  • 25%.
Q.10

Bitumen may be dissolved in

  • carbondioxide
  • water
  • sodium chloride
  • carbon disulphide
  • none of these.
Q.11

The yield strength and tensile strength of low carbon steel may be improved by the addition of

  • manganese
  • chromium
  • nickel
  • venadium
  • tungsten.
Q.12

Based on its dry weight, a freshly felled tree may contain water

  • 25%
  • 50%
  • 75%
  • 100%.
Q.13

Pick up the correct statement from the following:

  • Blistering may be cured by applying water paint finished with oil paint dried with a little copal varnish
  • Cracked paints may be cured by removing paint and giving a fresh coat of paint
  • Crawling paints may be cured by sand preparing the surface and giving a fresh coat with plenty of turps
  • All the above.
Q.14

Pick up the correct statement from the following:

  • Melamine is obtained from calcium carbide
  • Formaldehyde is prepared synthetically from methane
  • The melamine when reacted with formaldehyde forms the melamine-formaldehyde resin
  • The plastics made from melamine formaldehyde resin, are used for electrical insulators
  • All the above.
Q.15

The most valuable timber may be obtained from

  • chir
  • shisham
  • sal
  • teak.
Q.16

Pick up the correct statement from the following:

  • Rusting is caused due to combined action of air, moisture and carbon dioxide
  • During rusting, first ferrous bicarbonates are formed
  • On further oxidation ferrous bicarbonates get converted to ferric bicarbonates
  • Ultimately hydrated ferric oxide is formed during rusting and carbon dioxide gets liberated
  • All the above.
Q.17

Bitumen completely dissolves in

  • carbon bisulphide
  • chloroform
  • benzol
  • coaltar
  • All of these.
Q.18

Forge pig may be converted to wrought iron by

  • rolling
  • pudding
  • shingling
  • refining.
Q.19

The material generally not used as extender in paints, is

  • powdered silica
  • gypsum
  • talc
  • zinc white.
Q.20

Steel contains carbon approximately

  • 1.50% to 5.6%
  • 0.05% to 1.75%
  • 0.25%
  • none to these.
Q.21

Pick up the correct statement from the following:

  • Blisters in the finished wrought iron, are caused due to the reaction between oxide of iron and carbon
  • The edges of a finished wrought iron, are rough due to red shortage
  • Pig iron (charcoal) is manufactured from magnetic ore (Fe3O4)
  • For the manufacture of wrought iron, non-sulphurous fuel is not necessary
  • All the above.
Q.22

Pick up the compound responsible for early strength of cement from the following:

  • Tetra-calcium alumino-ferrite
  • Tricalcium silicate
  • Tricalcium aluminate
  • Dicalcium silicate.
Q.23

The cast iron when heated to red heat with powdered red haemetite in an oven for increasing its toughness, is converted to

  • grey cast iron
  • white cast iron
  • mottled cast iron
  • toughed cast iron.
Q.24

Jhumb bricks are

  • under burnt
  • over burnt
  • kutcha
  • none of these.
Q.25

The low voltage porcelain is mainly used for

  • switch block
  • insulating tubes
  • lamp sockets
  • All of these.
Q.26

Whitworth compressed steel is obtained when molten steel is subjected to a pressure of

  • 5 kg/mm2
  • 9 kg/mm2
  • 13 kg/mm2
  • 15 kg/mm2
  • 10 kg/mm2.
Q.27

Pick up the non-inflammable plastic from the following:

  • Cellulose acetate plastics
  • Polyvinyl chloride plastics
  • Phenol formaldehyde plastic
  • Urea formaldehyde plastic.
Q.28

Pick up the correct statement from the following:

  • Steel produced by open hearth process is milder than that obtained by the bessemer process
  • Engineers prefer open hearth steel for structural purpose as it is more homogenous
  • Basic Bessemer process is suitable for converting poor ore containing a large proportion of sulphur and phosphorus into steel
  • all the above.
Q.29

Cement paints usually

  • contain hydrated lime
  • contain 5% to 10% colour pigments
  • are prepared with white cement
  • contain 5% sodium chloride
  • all the above.
Q.30

Plastic bitumen is generally used for

  • road pavements
  • expansion joints
  • crack fillings
  • none to these.
Q.31

The percentage of water for normal consistency, is

  • 5% to 15%
  • 10% to 25%
  • 15% to 25%
  • 20% to 30%
  • 25% to 35%.
Q.32

The initial setting time of hydraulic lime, is

  • 30 minutes
  • 60 minutes
  • 90 minutes
  • 120 minutes
  • 150 minutes.
Q.33

Asbestos

  • is an excellant insulator for heat and electricity
  • is fire-proof and acid proof
  • has sp. gravity equal to 3.10
  • is smooth like glass and silk
  • All the above.
Q.34

The most commonly used synthetic abrasive is

  • aluminium carbide
  • boric acid
  • silicon
  • All of these.
Q.35

Quick lime

  • generates heat when added to water
  • reacts with carbon dioxide
  • may be used for white-washing
  • when mixed with water forms slaked lime
  • all the above.
Q.36

The steel which contains fissures and cavities, is manufactured by

  • Cementation process
  • Crucible process
  • Bessemer process
  • Open hearth process.
Q.37

Cast iron

  • is obtained by purifying pig iron
  • is manufactured in required shapes
  • may contain 2 to 5 per cent of carbon with other impurities
  • is remelted in a cupola furnace
  • all the above.
Q.38

Pick up the correct statement from the following:

  • The baked earth is called terra-cotta
  • The articles prepared from clay which is burnt at low temperature and cooled down slowly, are called earthen-ware
  • The articles prepared from refractory clays which as mixed with stone and crushed pottery, are called stone ware
  • The articles prepared from fine earthen ware which is white, thin and semi-transparent, are called procelain
  • All the above.
Q.39

Pick up the correct statement from the following:

  • The distinct plane of division along which a stone can easily be split, is called natural bed of stone
  • The natural bed of sedimentary rocks is along the planes of stratification
  • The natural bed of igneous rocks is not defined
  • All the above.
Q.40

The cement becomes unsound by the presence of excess

  • sulphur
  • magnesia
  • lime
  • All of these.
Q.41

Pick up the correct statement from the following:

  • The heating of a material to redness in contact with air, is known as calcination
  • The property of lime by which it sets or hardens in damp places having no free circulation of air is called setting
  • The product that remains after calcination of limestone, is called lime
  • All the above.
Q.42

Pick up the correct statement from the following:

  • The plywoods do not split or crack due to changes in atmosphere
  • The commercial plywoods are available upto 150 cm wide and upto 300 cm long
  • The plywoods possess uniform tensile strength in all directions
  • The plywoods are light in weight
  • All the above.
Q.43

PVC stands for

  • plastic very compact
  • polythene vinyl chloride
  • polythene vinyl carbon
  • polythene vanadium carbide.
Q.44

Mastic asphalt is normally used for

  • sound insulation
  • water proofing
  • fire proofing
  • none to these.
Q.45

The colour of statuary marble used for sculptor's work, is

  • red
  • blue
  • white
  • green
  • yellow
Q.46

Mild steel is used for

  • structural works in beams, joints and girders
  • small sized water pipes
  • columns and struts
  • none of these.
Q.47

For light and ornamental casting, the most unsuitable pig iron, is

  • Bessemer pig
  • Grey or foundry pig
  • White or forge pig
  • Mottled pig.
Q.48

Age of a tree may be ascertained by

  • radius of its stem
  • circumference of its stem
  • number of branches
  • number of annual rings.
Q.49

Pick up the volcanic rock from the following:

  • Granite
  • Dolerite
  • Basalt
  • All the above.
Q.50

Asbestos is

  • corrugated sheet used for roofing
  • an incombustible fire proof material
  • an organic substance
  • a bad insulator for sound and heat
  • all the above.
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