Inhaling of fly-ash over a long period causes
1.silicosis
2.fibrosis of lungs
3.bronchitis
4.All of these.
Inhaling of fly-ash over a long period causes
1.silicosis
2.fibrosis of lungs
3.bronchitis
4. All of these.
Pick up the correct statement from the following:
1.Alexander Parkes; a Scottish chemist prepared a hard material by mixing camphor and alcohol with nitro cellulose and called it; as Parkesite
2.Dr. L. Bakeland; a Belgian scientist prepared a product known as Bakelite
3.Pollark; an Austrian scientist prepared a substance from urea and formaldehyde and called it Plastic
4.All the above.
Black marble is generally found in the district of
1.Jodhpur
2.Jaipur
3.Jabalpur
4.Jaisalmer
Cast steel is manufactured by
1.Cementation process
2.Crucible process
3. Bessemer process
4. Open hearth process.
If P is the percentage of water required for normal consistency; water to be added for determination of initial setting time; is
1.0.70 P
2.0.75 P
3.0.80 P
4. 0.85 P
Soundness test of cement determines
1.quality of free lime
2.ultimate strength
3.durability
4.initial setting
The lime which contains mainly calcium oxide and slacks with water; is
1.fat lime
2.quick lime
3.hydraulic lime
4. poor lime
The standard size of masonry bricks; is
1.18 cm x 8 cm x 8 cm
2.19 cm x 9 cm x 9 cm
3.20 cm x 10 cm x 10 cm
4.21 cm x 11 cm x 11 cm
A 1st class brick immersed in water for 24 hours; should not absorb water (by weight) more than
1.10%
2.15%
3.20%
4.25%
A badly mixed cement concrete results in
1.segregation
2.bleeding
3. honey combing
4.none to these.
A good brick earth should contain :
1.about 20% to 30% of alumina
2.about 50% to 60% of silica
3.not more than 5% of lime
4.All the above.
A good quality stone absorbs water less than
1.5%
2.10%
3.15%
4.20%
A pug mill is used for
1.softening brick earth
2.moulding brick earth
3.moulding brick earth
4.providing brick earth
Apiece of sawn timber whose cross-sectional dimensions exceed 5 cm; in one direction and 20 cm in the other direction; is called a
1.cant
2.deal
3.baulk
4.strip.
Bessemer process is used for the manufacture of
1.Pig iron
2.cast iron
3.Wrought iron
4.Steel.
Cement is said to be of good quality if
1. its colour is not greenish grey
2.a handful of cement thrown into a bucket of water does not float
3.a handful of cement thrown into a bucket of water does not float
4.none of these.
Clay and silt content in a good brick earth must be at least
1.50%
2.40%
3.30%
4.25%
Expanded metal is
1.manufactured from steel sheets
2.used for reinforced concrete in road pavements
3.measured in term of SWM (shortway mesh) and LWM (long way mesh)
4.all the above.
For slaking of 10 kg of CaO; the theoretical amount of water is
1.2.2 kg
2.1.5 kg
3.3.2 kg
4. none of these.
For the manufacture of plywood; veneers are placed so that grains of adjacent veneers
1.run at right angles
2.parallel
3.inclined at 45°
4.inclined at 60°.
Geologically; marble is known as
1.sedimentary rock
2. igneous rock
3.metamorphic rock
4.stratified rock.
If the iron ore contains clay as an impurity; the flux added during calcination; is
1.clay
2. lime stone
3. argillaceous iron ore
4.all the above.
Inner part of a timber log surrounding the pith; is called
1.sapwood
2.cambium layer
3.heart wood
4.none to these.
The rocks in which argil (or clay) predominates; are called
1.sillicious rocks
2.argillaceous rocks
3. calcareous rocks
4.igneous rocks.
Mastic asphalt is generally used for
1.damp proof course
2. water proof layer
3.partition walls
4.both (a) and (b).
Minimum of 40% of iron; is available in
1.Magnetite
2.Magnetite
3.Limonite
4.Black band.
Minimum required water cement ratio for a workable concrete; is
1.0.3
2.0.4
3.0.5
4.0.6
Name the type of cement from the following for canal linings :
1.sulphate resisting cement
2.rapid hardening cement
3.quick setting cement
4.pozzuolana cement.
Pick up the correct statement from the following:
1.soft stones are required for carving
2. light stones are required for arches
3.hard stones are required to stand high pressure
4.all the above.
Pick up the correct statement from the following: Method of sawing timber
1.tangentially to annual rings; is known as tangential method.
2.in four quarters such that each board cuts annual rings at angles not less than 45°; is known as quarter sawing method.
3.cut out of quarter logs; parallel to the medullary rays and perpendicular to annual rings; is known as radial sawing.
4.all the above.
Pick up the correct statement regarding low heat cement from the following:
1.It possesses less compressive strength
2.Its initial setting time is about one hour
3. Its final setting time is about 10 hours
4.All the above.
Pick up the plutonic rock from the following:
1.Granite
2.Dolerite
3.Basalt
4.All the above.
Plywood is made from
1.common timber
2.bamboo fibre
3.teak wood only
4.asbestos sheets.
Quick lime (or caustic lime)
1. is obtained by the calcination of pure lime stone
2. has great affinity to moisture
3.is amorphous
4.all the above.
Refractory bricks are used for
1.retaining walls
2.columns
3.piers
4.combustion chambers.
Resins are
1.not soluble in water
2.soluble in spirit
3.used in varnishes
4.all the above.
Rocks formed due to alteration of original structure due to heat and excessive pressure are called
1.sedimentary rocks
2.sedimentary rocks
3.metamorphic rocks
4. none of these.
Seasoning is
1.a process of removing sap
2.creosoting
3.painting with sodium silicate
4.coating with tar.
Shingle is
1.decomposed laterite
2.crushed granite
3.water bound pebbles
4.air weathered rock.
The commonly used lime in white washing; is
1.white lime
2.fat lime
3.hydraulic lime
4.lime
The compound of Portland cement which contributes to the strength after two to three years is
1. Tricalcium silicate
2. Tricalcium silicate
3.Tricalcium aluminate
4. Tetracalcium alumino ferrite.
The filler used in plastic bitumen; is
1.shale powder
2.talc powder
3.asbestos powder
4.plastic powder
The most fire resistant paints are :
1.enamel paints
2.aluminium paints
3. asbestos paints
4. cement paints.
The proportions of charcoal; saltpetre and sulphur in gun powder by weight; are respectively:
1.15; 75; 10
2.75; 10; 15
3.10; 15; 75
4. 10; 75; 15.
The rock generally used for roofing; is
1.granite
2.basalt
3.slate
4.pumice.
The slag which floats on the surface of the molten iron generally contains
1.Lime (CaO) 45%
2. Silica (SiO2) 35%
3.Alumina (Al2O3) 12%
4.all the above.
Which one of the following is an air binding material ?
1.Gypsum
2.Acid-resistant cement
3.Quick lime
4.All of these.