In a four stage compressor system first and third stage pressures are 1 and 9 kg/cm2 respectively. What will be the fourth stage delivery pressure
A.3 kg/cm2
B.9 kg/cm2
C.27 kg/cm2
D.81 kg/cm2
E.243 kg/cm2
Category: Heat Engines Mcqs
Free air is air at
A.Atmospheric conditions at any specific location
B.1 kg/cm2 and atmospheric temperature
C.1 kg/cm2 and 0?C
D.1 kg/cm2 and 20?C
E.1 kg/cm2 and 27?C
To avoid moisture trubles, the branch connection from compressed air line are taken from
A.Top side
B.Bottom side
C.Left side
D.Right side
E.Any side
Which one of the following symptoms will not show that combustion is becessary complete.
A.Presence of free carbon in exhaust
B.Presence of carbon monoxide in exhaust
C.Presence of oxygen in exhaust
D.Presence of nitrogen in exhaust
E.All of the above
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
Rankine cycle efficiency for fixed steam temperature of any volume upto critical temperature will be maximum for steam pressure of
A.Critical pressure
B.100 kg/cm2
C.200 kg/cm2
D.203.5 kg/cm2
E.250 kg/cm2
Which is the external loss in a steam turbine?
A.Nozzle losses
B.Blade friction losses
C.Disc friction losses
D.Gland leakage losses
E.Back pressure losses
Generally steam turbines in power station operate at
A.3000 RPM
B.1500 RPM
C.1000 RPM
D.375 RPM
E.50 RPM
The vapour pressure is related to the enthalpy of vaporization in
A.Clausius Clapeyron equation
B.Henry’s law
C.Raoult’s law
D.Maxwell’s equation
E.Dalton’s law
Air required for complete combustion of 1 kg of carbon is 11.6 kg. If a fuel contains 88.6% Carbon and 11.4% Hydrogen, the air requirement will
A.Remain unaltered
B.Will decrease
C.Will increase
