The blades of a turbine are made of
A.Cast iron
B.Nickel alloy
C.Stainless steel
D.Alloy steel
E.High speed steel
Category: Heat Engines Mcqs
If in a compression ignition engine the noise level is to be reduced, the design features which will not be affected are
A.Combustion system
B.Exhaust muffling
C.Intake muffling
D.Fuel injection equipment
E.None of the above
Which one of the following factors will not assist in getting high power output from a compression ignition engine
A.High compression ratio
B.Fine atomisation of fuel
C.High charge density
D.Large quantity of excess air
E.None of the above
For the same maximum pressure and heat input the least efficient cycle is
A.Brayton
B.Otto cycle
C.Diesel cycle
Total sulphur content in a diesel fuel oil must not exceed
A.1%
B.0.50%
C.0.10%
D.0.05%
E.0.01%
In jet engines the compression ratio
A.Varies with altitude
B.Varies with altitude
C.Varies with square of speed
D.Remains constant
E.Depends on other factors
A gas turbine works on
A.Carnot cycle
B.Brayton cycle
C.Dual cycle
D.Rankine cycle
E.Regenerative cycle
Vapour lock is
A.Seizure of supply of fuel in a diesel engine
B.Serious restriction to the supply of fuel due to excessively rapid formation of vapour in S.I. engine
C.Locking of carbourettor jets due to vapour formation
D.Locking of jets due to impurities in petrol
E.None of the above
Dissociation is
A.Same is combustion
B.Process of heat liberation in which no flame exist
C.Slow combustion
D.Smokeless combustion
E.Combustion without heat
