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
Correct Answer :
B. 9 kg/mm2
Related Questions
Pozzolana (or surkhi) is used in lime
To impart hydraulicity
To prevent shrinkage
To decrease the cost of construction
To decrease the setting time
For testing compressive strength of cement, the size of cube used is
50 mm
70.6 mm
100 mm
150 mm
Putty is
Made with finely powdered chalk and linseed oil
Used for fixing glass panes
Softened by a solution of pearl ash and quick-lime soaked in water
All the above
Inner part of a timber log surrounding the pitch, is called
Sapwood
Cambium layer
Heart wood
None to these
The most commonly used synthetic abrasive is
Aluminium carbide
Boric acid
Silicon
All of these
Sapwood consists of
Innermost annular rings around the pith
Portion of timber between heartwood and cambium layer
Thin layers below the bark
Thin fibre which extends from the pith outwards and holds the annular rings together
Which of the following stresses is used for identifying the quality of structural steel?
Ultimate stress
Yield stress
Proof stress
None of the above
Soundness of cement is tested by
Vicat's apparatus
Le-chatelier apparatus
Compressive strength testing apparatus
None of these
Portland cement manufactured from pure white chalk and clay but free from iron-oxide, is known as
Quick setting cement
Rapid hardening cement
White cement
Low heat Portland cement
The commonly used colour pigment in paints, is
Ambers
Carbon black
Iron oxide
All the above
Which of the following should be used for hearting of thicker walls?
Headers
Stretchers
Brick bats
Queen closer
The vehicle used in case of enamel paints is usually
Linseed oil
Water
Varnish
None of the above
Plywood is made by bonding together thin layers of wood in such a way that the angle between grains of any layer to grains of adjacent layers is
0°
30°
45°
90°
Refractory bricks are
Neutral refractory bricks
Acid refractory bricks
Basic refractory bricks
All the above
The stone suitable for rubble masonry should be.
Hard
Tough
Heavy
Light
The trunk of tree left after cutting all the branches is known as
Log
Batten
Plank
Baulk
The foliated structure is very common in
Sedimentary rocks
Igneous rocks
Metamorphic rocks
None of these
Permanent magnets are made of high carbon steel and
15% of cobalt
20% of cobalt
35% of cobalt
45% of cobalt
Quick setting cement is produced by adding
Less amount of gypsum in very fine powdered form
More amount of gypsum in very fine powdered form
Aluminium sulphate in very fine powdered form
Pozzolana in very fine powdered form
The minimum compressive strength of 2nd class bricks should be
75 kg/cm2
90 kg/cm2
100 kg/cm2
120 kg/cm2
The rock generally used for roofing, is
Granite
Basalt
Slate
Pumice
The most important constituent of an oil paint, is
Thinner
Vehicle
Pigment
All the above
Iron ore may contain
Carbon
Silicon
Phosphorus and manganese
All the above
Gypsum is a
Mechanically formed sedimentary rock
Igneous rock
Chemically precipitated sedimentary rock
Metamorphic rock
The main ingredients of Portland cement are
Lime and silica
Lime and alumina
Silica and alumina
Lime and iron
Index number expressing the relative sizes of both coarse and fine aggregates, is called
Proportioning of aggregates
Fineness modulus
Grading of aggregates
None of these
The portion of the brick without a triangular corner equal to half the width and half the length, is called
Closer
Queen closer
King closer
Squint brick
The softest rock is
Marble
Diamond
Talc
Quartz
Pick up the correct statement from the following:
The phenol is carbolic acid
The phenol is either extracted from coal-tar or prepared from benzene
Phenol reacts with formaldehyde, to form phenol formaldehyde resin
All the above
Pick up the correct statement from the following:
The theory of formation of concrete is based on the phenomena of formation of voids
The bulking of sand is taken into account while volumetric proportioning of the aggregates
The dry sand and the sand completely flooded with water, have practically the same volume
All the above