A. Make the plate softer
B. Burn oil & grease sticking to plate surfaces
C. Avoid plate distortion
D. Prevent cold cracks
✅ The correct answer is option D.
Engineering MCQs
Which of the following is not the function of a volute casing provided in a centrifugal pump?
A. To reduce the head loss in discharge
B. To increase the pump efficiency
C. To collect liquid from the periphery of the impeller and to transmit it to the delivery pipe at constant velocity
D. To increase the pump discharge rate
✅ The correct answer is option D.
Spark plug is provided in a/an
A. Engine having carburettor
B. Diesel engine
C. Compression ignition engine
D. Both(b) & (c)
✅ The correct answer is option A.
__________ glass is used in the mercury in glass thermometer meant for measuring a temperature of 500°C.
A. Borosilicate
B. High silica
C. Supermax
D. Lead
✅ The correct answer is option C.
Pick out the correct combination about the role of various additives used in polymers.
A. Plasticiser : increases the polymer strength
B. Heat stabiliser : increases the maximum service temperature
C. Fillers: Does not affect the property of polymer but increases its weight
D. Lubricants: increases the flexibility of polymers
✅ The correct answer is option C.
__________ is the process of coating the surface of steel with aluminium oxide, thereby imparting it increased resistance to corrosion & oxidation upto a temperature of 700°C.
A. Vaneering
B. Galvanising
C. Electroplating
D. Calorising
✅ The correct answer is option D.
The excess air required for the combustion of pulverised coal is of the order of about __________ percent.
A. 5
B. 15
C. 30
D. 45
✅ The correct answer is option B.
Commonly employed coolant for high pressure turbogenerator is
A. Air
B. Carbon dioxide
C. Hydrogen
D. Water
✅ The correct answer is option C.
In case of fluid moving machineries, the relationship between saturation temperature and pressure decides the process of
A. Water hammer
B. Cavitation
C. Flow separation
D. Turbulent mixing
✅ The correct answer is option B.
In a forced draft cooling tower, water is cooled from 95 to 80°F by exposure to air with a wet bulb temperature of 70°F. In this case, the
A. Range is 15°F
B. Approach is 10°F
C. Both A & B
D. Neither A nor B
✅ The correct answer is option C.