Top 350+ Solved Heat Engines MCQ Questions Answer
Q. How many kg of air will contain one kg of oxygen?
a. 6.65 kg
b. 10 kg
c. 4.35 kg
d. 12.5 kg
e. 1 kg
Q. 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
Q. Which of the following part is not common between a steam engine and a petrol engine?
a. Crankshaft
b. Connecting road
c. Piston rings
d. Muffler
e. Piston
Q. The efficiency of a jet engine is higher at
a. Higher altitudes
b. Lower altitudes
c. High speeds
d. High speeds and low altitudes
e. Low speeds
Q. Which of the following is a false stagement: The cause of excessive engine vibrations especially at high speeds in spark ignition engines is
a. Unequal distribution of mixture
b. Unbalanced crankshaft
c. Unequal compression of engine cylinders
d. Ignition distributor point not synchrohized
e. Unbalanced fan or loose fan blade
Q. In regenerative feed heating system the steam 'bled' from turbine exchanges heat with
a. High pressure steam coming from boiler
b. Air for preheating
c. Fuel for preheating
d. Feed water for boiler
e. All of the above
Q. In thermodynamics spontaneous processes are those
a. Where a difference is observed in any microscopic property of the system between different times or states
b. Where a difference is observed in any microscopic property of the system between different times or states
c. Which occur in the direction of an intensive property or driving force contained within the system
d. Which require an agency outside the system to force the process
e. None of the above
Q. Which one of the following is not a constituent of coal
a. Carbon
b. Manganese
c. Inorganic matter
d. Hydrogen
e. Nitrogen
Q. The gas used for cooling the conductors of large generators is
a. Nitrogen
b. Air
c. Oxygen
d. Carbon dioxide
e. Hydrogen
Q. During preliminary test run of an engine for 7 hours cycles if the engine stops after operating for 5 hours then
a. The engine is rejected
b. The engine is again run for 7 hours
c. The engine in run for balance 2 hours
d. The engine is removed and another piece tested
e. None of the above
Q. Prony brake is used for testing of
a. Slow speed engines
b. Large engines
c. Small engines
d. High speed engines
e. Engines having small flywheel
Q. The missing quantity in a steam engine can be reduced by all of the following methods EXCEPT
a. Superheating the steam supplied to the engine
b. Steam jacketing of cylinder walls
c. Reducing the speed of the engine
d. Dompounding the expansion of steam in two or more cylinders
e. 85% octane + 15% heptane
Q. In the Bomb calorimeter the fuel to be tested is burned
a. There is no consideration of pressure, volume or temperature.
b. At constant temperature
c. At constant volume
d. In open atmosphere
e. At constant pressure
Q. Boilers using Bagasse as fuel use
a. Travelling grate stroker
b. Underfeed stokers
c. Pulverized fuel burners
d. Chain grate stokers
e. Spreader stokers