During sensible heating of humid air__________________?
(A) Relative humidity increases
(B) Dew point remains constant
(C) Dry bulb & wet bulb temperature increases
(D) Both B & C
During sensible cooling of air, its wet bulb temperature ?
(A) Decreases but dew point remains constant
(B) Increases but dew point remains constant
(C) Increases & the dew point decreases
(D) Decreases & the dew point increases
Function of gear box is to____________________?
(A) Reduce the speed
(B) Obtain variable speed
(C) Increase the speed
(D) Produce high torque
Carbon supply in pack carburising process is in the form of ___________________?
(A) Charcoal
(B) Calcium carbide
(C) Hydrocarbon oil
(D) Graphite
Heat release during phase change is observed in case of a/an_________________?
(A) Boiler
(B) Condenser
(C) Evaporator
(D) All
Steam condenser tubes are made of admiralty brass, in which percentage of zinc & copper are _______________ respectively ?
(A) 70 & 30
(B) 30 & 70
(C) 50 & 50
(D) 90 & 10
Hollow shafts can be made as strong as solid shafts by making the twisting moments of both the shafts same. Shafts made by _____________ have residual stresses ?
(A) Forging
(B) Cold rolling
(C) Hot rolling
(D) Casting
The excess air required for the combustion of pulverized coal is of the order of about _______________ percent ?
(A) 5
(B) 15
(C) 30
(D) 45
In the diving apparatus, helium is used along with oxygen, because it is ____________________?
(A) Easily available
(B) Not soluble in blood at high pressure
(C) Lighter than nitrogen
(D) Completely miscible with oxygen
Probability of cavitation occuring becomes very high, when the local _______________ resulting ?
(A) Pressure falls below the vapour pressure
(B) Pressure becomes very high
(C) Temperature becomes low
(D) All A, B & C