Which of the following is the least efficient method of governing steam turbines?
A.Nozzle control governing
B.Throttle governing
C.Bypass governing
D.Combined throttle and nozzle governing
Category: Mechanical Engineering Mcqs
Which of the following gas can be analysed by chemiluminescence?
A.Ozone
B.Carbon dioxide
C.Nitrogen
D.All of the above
Major modification required to produce temperature of – 200?C in a vapour compression refrigeration system using Freon 12 as refrigerant, is
A.Size of compressor required would be large to handle volumes of vapour
B.Compression ratio has to be restricted till stronger body of compressor is needed
C.Condenser capacity must be increased to handle the refrigerant
D.Insulation should be capable of withstanding such low temperatures
E.Freon 12 cannot be used for such low temperatures
A LVDT has
A.One primary coil and two secondary coils
B.Two primary coils and one secondary coil
C.One primary coil and one secondary coil
D.Two primary coils and two secondary coils
True centrifugal casting is used to
A.Cast objects symmetrical about an axis
B.Get accurate castings
C.Get dynamically balanced castings
D.Get statistically balanced castings
E.Get chilled castings
A bullet is fired from a fifle. If the rifle recoils freely, the kinetic energy of the rifle
A.will be more than the kinetic energy of the bullet
B.will be less than the kinetic energy of the bullet
C.will be the same as the kinetic energy of the bullet
The major constituent of natural gas is
A.Methane
B.Acetylene
C.Carbon monoxide
D.Hydrogen
E.Ammonia
The statement: If a maximum of gases or vapours is enclosed in a container, each will exert its own pressure on the container entirely independent of the others and the total absolute pressure will be equal to the sum of the partial pressure exerted by each of the gases. This statement is known as
A.Newton’s law of gases
B.Kinetic theory of gases
C.Fick’s law
D.Avogadro’s hypothesis
E.Dalton’s law of partial pressures.
In halide torch test if there is leakage of refrigerant, the colour of flame with change to
A.Yellow
B.Red or pink
C.Violet or orange
D.Black or grey
E.Blue or bright green
