Specific heat of a gas for a reversible adiabatic process
A.is zero
B.is infinity
C.is negative
D.varies between zero and infinity
Category: Engineeeing Mcqs
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
The phenomenon of materials in which slow extension of materials takes place with the time at constant load is known as
A.Plasticity
B.Elasticity
C.Malleability
D.Ductility
E.Creep
Under Emerson’s efficiency plan an incentive is paid to a worker whose output exceeds
A.67%
B.75%
C.80%
D.100%
Turbidity in water is due to
A.Algae
B.Fungi
C.Organic salts
D.Finely divided particles of clay, silt and organic matter
E.None of the above
Which of the following has minimum specific heats ratio
A.Hydrogen
B.Nitrogen
C.Mercury vapour
D.Sulphur dioxide
In case of eutectoid steels which one of the following structures has the maximum hardness?
A.Pearlite
B.Sorbite
C.Troosite
D.Acicular
E.Martensite
Torr is equal to the pressure of
A.0.1 mm of Hg at 0?C in a standard gravitational field
B.1 mm of Hg at 0?C in a standard gravitational field
C.0.01 mm of Hg at 0?C in a standard gravitational field
D.0.001 mm of Hg at 0?C in a standard gravitational field
A non-reversible machine has efficiency
A.nearly 100%
B.between 75% and 99%
C.more than 50%
D.less than 50%
Addition of nickel to cast iron increases
A.hardness
B.corrosion resistance
C.tensile strength
D.all of the above
