Related Questions

If a refractory contains high content of silicon, it means refractory is
A Acidic
B Basic
C Neutral
D Brittle
An insulating refractory brick should have high porosity and low thermal conductivity. Which of the following is not used for inducing porosity in the insulating refractory bricks during its manufacture?
A Cork
B Saw dust
C Sand
D Chemically prepared foam
Which of the following represents a carpet of sand-bitumen mix without coarse aggregates ?
A mastic asphalt
B sheet asphalt
C bituminous carpet
D bituminous concrete
Maximum water percentage in refractory mix meant for hand moulding may be as high as __________ percent.
A 2-3
B 5-7
C 7-12
D 14-20
Coffee A costs 75 cents per pound. It is mixed with Coffee B, which normally costs 80 cents per pound, to form a mixture that costs 78 cents per pound. If there are 10 pounds of the mix, how many pounds of Coffee A were used in the mix?
A 3
B 4
C 4.5
D 5
The most economical section of a rectangular channel is one which has hydraulic mean depth or hydraulic radius equal to
A Half the depth
B Half the breadth
C Twice the depth
D Twice the breadth
The hydraulic mean depth or the hydraulic radius is the ratio of
A Area of flow and wetted perimeter
B Wetted perimeter and diameter of pipe
C Velocity of flow and area of flow
D None of these
Refractory materials are never used in the construction of
A Segar cones
B Orton cones
C Pressure vessels
D Ovens & retorts
The ratio of the actual mass of water vapour in a unit mass of dry air to the mass of water vapour in the same mass of dry air when it is saturated at the same temperature and pressure, is called
A Humidity ratio
B Relative humidity
C Absolute humidity
D Degree of saturation
strauss finished --- two of his published compositions before his tenth birthday.
A written
B writing
C write
D to write

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