The dew point of moist air becomes ______ with decrease in its relative humidity:
A. Less than the wet bulb temperature
B. More than the wet bulb temperature
C. More than the dry bulb temperature
D. Equal to wet bulb temperature
Basicity [%Cao + %MgO + %SiO2) of the slag in Indian blast furnace is in the range of:
A. 0.7-1.0
B. 1.1-1.4
C. 1.5 – 1.8
D. 2.0 – 2.5
The most commonly used moderator in nuclear power plants is:
A. Graphite
B. Light water
C. Heavy water
D. Beryllium
Eutectic reaction for iron-carbon system occurs at a temperature of _____ °C:
A. 723
B. 959
C. 1147
D. 1493
Minimum thermal efficiency of a steam boiler may be around _______ percent:
A. 25
B. 45
C. 65
D. 20
Corona discharge is related to the operation of a/an:
A. Induction motor
B. Electrostatic precipitator
C. Fast breeder reactor
D. Magneto hydrodynamic generator (MHD)
Silicon crystal can be converted to p-type semi-conductor by doping with:
A. Phosphorous
B. Nitrogen
C. Carbon
D. Boron
Which of the following is normally not found in both the S.I. (petrol) & C.I. (diesel) engines:
A. Air filter
B. Fuel injector
C. Exhaust silencer
D. Battery
Vibration upto 100 kilo hertz can be most accurately measured by a ____ type accelerometer:
A. Preloaded spring
B. Piezoelectric
C. Bonded strain gauge
D. None of these
Brinell Hardness Number (BHN) for talc is approximately in the range of:
A. 1-5
B. 20-30
C. 100-150
D. 200-250
