Lime stone is not a
1.sedimentary rock
2. stratified rock
3.aqueous rock
4.metamorphic rock.
PVC stands for
1.plastic very compact
2.polythene vinyl chloride
3.polythene vinyl carbon
4.polythene vanadium carbide.
The kiln which may work throughout the year, is
1.Clamp
2.Bull's kiln
3.Hoffman's kiln
4.none of these.
A piece of timber whose thickness and width are respectively 5 cm and 10 cm is called
1.slate
2.plank
3.board
4.strip.
A volatile substance added to a paint to make its application easy and smooth, is known as
1.base
2.solvent
3.vehicle
4.none to these.
Age of a tree may be ascertained by
1. radius of its stem
2. radius of its stem
3.number of branches
4.number of annual rings.
Cement paints usually
1.contain hydrated lime
2.contain 5% to 10% colour pigments
3.are prepared with white cement
4.contain 5% sodium chloride
Generally wooden moulds are made from
1.ply wood
2.shisham wood
3.deodar wood
4.teak wood
Mastic asphalt is normally used for
1.sound insulation
2.water proofing
3.fire proofing
4.none to these.
Pick up the correct statement from the following:
1.Slaked lime contains calcium hydroxide
2.Quick lime contains calcium oxide
3.Slaked lime may be obtained from quick lime
4.All the above.
Pig iron is manufactured from the ores by
1.dressing
2.calcination and roasting
3.smelting
4.all the above.
Plywood is obtained by gluing wooden sheets at
1. 100 to 150 N/cm2
2.100 to 130°C
3.both (a) and (b)
4.Neither (a) nor (b).
Putty is
1.made with finely powdered chalk and linseed oil
2.used for fixing glass panes
3.softened by a solution of pearl ash and quick-lime soaked in water
4.all of these.
Quick lime
1.generates heat when added to water
2.reacts with carbon dioxide
3.may be used for white-washing
4.all the above.
The cement becomes unsound by the presence of excess
1.sulphur
2.magnesia
3.lime
4.All of these.
The initial setting time of hydraulic lime, is
1.30 minutes
2.60 minutes
3.90 minutes
4.120 minutes
The low voltage porcelain is mainly used for
1.switch block
2.insulating tubes
3.lamp sockets
4.All of these.
The minimum compressive strength of 1st class bricks should be
1.75 kg/cm2
2. 90 kg/cm2
3.100 kg/cm2
4.120 kg/cm2
The portion of a brick cut to form angles other than right angles in plan, is known as
1.queen closer
2.king closer
3.closer
4.squint brick.
The size of modular bricks, is
1.10 x 10 x 9 cm
2.19 x 9 x 9 cm
3.22.5 x 10 x 8.5 cm
4.22.5 x 8.0 x 9 cm.