Duco is one of the patent forms of
1. emulsion paints
2.plastic paints
3.bituminous paints
4.cellulose paints.
Knots in timber are
1.defects caused by crushing fibres
2.splits radiating from the centre
3.speckled strains
4.signs of branches cut off.
Pick up the correct statement from the following:
1.Solder material is an alloy which melts at a temperature above 400°C
2.Brazing is done at temperature above 600°C to 1100°C
3.Brazing joint is stronger than the solder joint
4.all the above.
Turpentine oil is used in paints as
1.thinner
2.vehicle
3.base
4.drier.
Bulking of sand is caused due to
1.surface moisture
2.air voids
3.viscosity
4.clay contents
Dextrin is
1.animal glue
2.starch glue
3. albumin glue
4. rubber based adhesive
Dextrin is
1.animal glue
2.starch glue
3.albumin glue
4.rubber based adhesive
If water required for 1 bag of cement is 30 litres, the water cement ratio is :
1.0.4
2.0.5
3.0.6
4.None of these.
In paints, the pigment is responsible for
1.durability
2.colour
3.smoothness
4.None of these.
Quick setting cement is produced by adding
1.less amount of gypsum in very fine powdered form
2. more amount of gypsum in very fine powdered form
3.aluminium sulphate in very fine powdered form
4.pozzolana in very fine powdered form
Stones used for ornamental work must be
1.soft
2.hard
3.light
4.heavy
The cracks caused by shrinkage of the exterior surface of the wood exposed to atmosphere, are called:
1.radial shakes
2. heart shakes
3.wind cracks
4.twisted fibres
Bituminous fells are used for
1.covering A.C. sheets
2.covering sloping roofs
3.D.P.C.
4.none to these.
Dry rot
1.cracks the timber
2.reduces the strength of timber
3. reduces the timber to powder
4.shrinks the timber
During pudding
1.molten metal is kept clear of the fuel
2.molten metal is kept clear of the fuel
3.silicon forms a slag
4.all the above.
Fibre boards can be
1.distempered
2.painted
3.painted and distempered
4.used for furniture.
For the manufacture of stainless steel, steel is mixed with
1.chromium
2.nickel
3.tungsten
4.none of these.
German silver is an alloy of
1.zinc, lead and nickel
2.silver, gold and lead
3.copper, nickel and zinc
4.copper, brass and zinc
Initial setting of cement is caused due to
1.Tri-calcium silicate
2. Di-calcium silicate
3. Tri-calcium aluminate
4.Tetra calcium alumino ferrite.
Iron ore may contain
1.carbon
2.silicon
3.sulphur
4.all the above.
Lime concrete is generally used for
1.wall foundations
2.flooring at ground level
3.both (a) and (b)
4.neither (a) nor (b).
Pick up correct statement from the following:
1.Fibre boards are used for thermal and acoustic control
2.Fibre boards are used for light weight standing members
3.Fibre boards are obtained by impregnating a resin product on fibres
4.all the above.
Pick up the correct statement from the
1.The substance which consists of one primary chemical, is known as monomer
2.The polymer consists of thousands of monomers joined together
3.The polymer molecule is called macro-molecule
4.All the above.
Pick up the correct statement from the following:
1.The phenol is carbolic acid
2.he phenol is either extracted from coal-tar or prepared from benzene
3.Phenol reacts with formaldehyde, to form phenol formaldehyde resin
4.all the above.
Pick up the correct statement from the following:
1.Catalysts are added to assist and accelerate the hardening of resin,
2.The fillers are inert materials and they impart strength and hardness
3. Fibrous fillers increase thermal resistance
4.All the above.
Pick up the correct statement from the following:
1.Corrugated sheet iron is made by passing plain sheets between grooved rollers
2.Strength and stiffness of corrugated sheets are considerably increased
3.Corrugated sheets are generally gal-venised to protect iron from corrosion by rust
4.all the above.
Pick up the correct statement from the following:
1.Plastics have generally low melting point
2. The coefficient of thermal expansion of plastics is about three times than that of steel
3.The acoustical boards prepared by impregnating fibre-glass with phenolic resins has absorption coefficient of about 0.67
4.All the above.
Pick up the correct statement from the following:
1.Quick lime is obtained by burning pure lime stone:
2.Hydraulic lime is obtained by burning lime stone containing clay 5% to 30%
3.Poor lime is obtained by burning lime stone containing impurities more than 5%
4.All the above.
Pick up the incorrect statement from the following:
1.Plastics are chemical resistant
2.Plastics are durable
3.Plastics are ductile
4.Plastics are excellent electric insulators.
Portland cement manufactured from pure white chalk and clay but free from iron-oxide, is known as
1.quick setting cement
2.rapid hardening cement
3.white cement
4. low heat Portland cement.
Portland pozzolana cement possesses
1.higher resistance to chemical attack
2.lower heat of hydration
3. lower shrinkage on drying
4.all the above.
Pozzolana (or surkhi) is used in lime
1.to impart hydraulicity
2. to prevent shrinkage
3.to decrease the cost of construction
4.to decrease the setting time.
Quartzite, a metamorphic stone is
1.hard
2.brittle
3.crystalline
4.All the above.
Smith's test of stones is performed to find out
1.the presence of soluble matter of stone
2.the compressive strength of the stone
3.the hardness of the stone
4.the toughness of the stone.
Stuco paints are suitable for
1.stone masonry
2.brick walls
3.both (a) and (b)
4. neither (a) nor (b).
The commonly used drying oil for oil paints, is
1.accetate of lead.
2.olive oil
3.linseed oil
4.kerosine oil
The foliated structure is very common in
1.sedimentary rocks
2.igneous rocks
3.metamorphic rocks
4.none of these.
The hardest rock is
1.marble
2.diamond
3.talc
4.quartz.
The minimum compressive strength of Ilnd class bricks should be
1. 75 kg/cm2
2. 100 kg/cm2
3. 120 kg/cm2
4. 150 kg/cm2
The normal curing period for lime mortar, is:
1.one day
2.3 days
3.7 days
4.10 days
The operation of removal of impurities or clay adhering to iron ores, is known as
1.dressing
2.dressing
3.roasting
4.smelting.
The presence of original rounded surface on the manufactured piece of timber, is called
1.Wane
2.Torn grain
3.Diagonal grain
4.Chipmark.
The process of decarbonising the pig iron completely and then adding proper percentage of carbon for manufacturing steel, is called
1.Cementation process
2.crucible process
3.Bessemer process
4.Open hearth process.
The silica is used for preparing
1.silica bricks
2.coke oven
3. lining for glass furnaces
4.all of these.
The timber having maximum resistance against white ants, is obtained from
1.chir
2.shisham
3.sal
4.teak
The type of steel used for precision levelling staff, is
1.Titanium steel
2.Carbon steel
3.Invar
4. Stainless steel.
The weight of 1 m3 of brick earth, is about
1.1200 kg
2.1500 kg
3.1800 kg
4.2000 kg
Which one of the following polymers is obtained from condensation polymerization ?
1.phenol formaldehyde
2.carbamide
3.melamine-formaldehyde
4. all of these.
Wrought iron is manufactured from pig iron by
1.refining
2.puddling
3.shingling
4.all the above.
Wrought iron is used for
1.structural works in beams
2.small sized water pipes
3.columns and struts
4.none to these.