For the standard atmosphere upto the stratosphere temperature of air decreases uniformly at the rate of
A.0.65?C/m
B.0.065?C/m
C.0.0065?C/m
D.0.00065?C/m
Category: Engineeeing Mcqs
Brass is
A.Copper-zinc alloy
B.Copper-tin alloy
C.Copper-lead alloy
D.Copper-nickel alloy
E.Copper aluminium alloy
Cut of ratio in a steam engine is the ratio of
A.Pressure at cut off to supply pressure
B.Pressure at cut off to exhaust pressure
C.Pressure at cut off to mean effective pressure
D.Fraction of piston stroke which the piston has travelled when cut off occurs
E.Work done by piston after cut off to total work done per cylinder
For flow of petrol from fuel tank to the carburettor, the fuel system includes
A.An acceleration pump
B.A vacuum pump
C.A fuel pump
D.A suction pump
E.A float
Pour point of a fluid
A.relates to a considerable increase of viscosity with decrease in temperature
B.refers to the change of phase from liquid to solid
C.refers to sudden discontinuity in fluid properties
D.none of the above
Raw materials for the manufacture of orthophosphoric acid by wet process are phosphate rock and
A.coke
B.98% H2SO4
C.sand
D.60% HNO3
The secondary critical speed of a shaft occurs at
A.Half the primary critical speed
B.Twice the primary critical speed
C.Four times the primary critical speed
D.Occurs only when there are more than 2 rotors on a shaft
E.If the externam exciting system has a frequency other than the primary critical speed
A 660 V cable is known as
A.Low tension cable
B.High tension cable
C.Super tension cable
D.Extra high tension cable
E.Extra super voltage cable
Thermie
A.Is a unit of temperature measurement
B.Is a unit of latent heat measurement
C.Is thermal conductivity of materials
D.Is quantity of heat required to raise temperature of one tonne of water from 14.5?C to 15.5?C
E.Is the temperature change in water when 1000 calories of heat are added to 1 gm of water, gradually
