Top 350+ Solved Heat Engines MCQ Questions Answer
Q. In aircraft using gas turbine the cycle used is
a. Reheating
b. Regeneration
c. Reheating with regeneration
d. Simple
e. Multi-stage expansion with reheating and regeneration
Q. Which of the following automobile is relatively free from pollution problems
a. Diesel engine powered
b. Wankel engine powered
c. Batterly powered
d. Gas turbine powered
e. Petrol engine powered
Q. During idling a petrol engine requires
a. Rich mixture
b. None of above
c. Chemically correct mixture
d. Variable mixture
e. Lean mixture
Q. A diesel engine is to be redesigned to improve the overload capacity. The design feature which will be influenced is
a. Size of fuel injection equipment
b. Lubrication
c. Air capacity of cylinder
d. Cooling water velocity
e. All of the above
Q. Which of the following pollutants result from automobile exhaust?
a. Carbon monoxide
b. Nitrous oxide
c. Hydro carbons
d. Sulphur dioxide
e. All of the above
Q. Which is incorrect?
a. Compression ratio = initial volume + final volume
b. Final pressure = Initial pressure x compression ratio
c. Initial pressure = final pressure + compression ratio
d. Initial volume = compression ratio x final volume
e. None of the above
Q. Coking is
a. Formation of lumps or masses of coke in boiler furnaces at high temperatures
b. Heating of coal in absence of air driving carbon and leaving behind the residue of carbon
c. Burning of coal in a furnace
d. Producing lumps of coal from fine powders with the help of a binder
e. None of the above
Q. In a diesel engine the inlet pressure is more than the atmospheric pressure. Therefore; it can be concluded that
a. The engine is high speed type
b. The engine is air cooled
c. The engine is water cooled
d. The engine is slow speed type
e. The engine is supercharged
Q. In a impulse turbine while steam flows through the moving blades
a. Velocity increases
b. Velocity reduces
c. Both velocity as well as pressure increase
d. Velocity reduces while pressure increases
e. Pressure reduces
Q. A hydrograph is a plot of discharge through a river versus
a. Time
b. Velocity of water
c. Rate of flow of water
d. None of the above
e. None of the above
Q. The amount of exhaust gases in clearance space left after exhaust stroke, varies with
a. Clearance volume
b. Carbon dioxide
c. air-fuel ratio of charger
d. Speed and load of the engine
e. Bore and length of cylinder
Q. Out of the following diesel engine the minimum air consumption per B.H.P. will be in
a. 50%
b. 4 stroke, air injection
c. 2 stroke, air injection
d. 2 stroke, mech, injection, pump, scavenging
e. 4 stroke, mech, injection
Q. Enthalpy of a substance is defined as
a. The sum of internal energy and the work done in forcing unit mass of substance into an enclosure at the constant pressure at which the substance exists
b. Sum of sensible heat + latent heat of substance
c. Total heat content of substance above zero degree centigrade
d. Sensible heat of water + work done in forcing unit mass of substance into an enclosure at constant pressure at which the substance exists
e. None of the above
Q. Endurance test for I.C. engines is conducted for
a. 1000 hours
b. 200 hours
c. 500 hours
d. 400 hours
e. 100 hours
Q. A system having connected load of 100 kW, peak load of 80 kW, base load of 20 kW and average load of 40 kW will have a load factor of
a. 60%
b. 40%
c. 75%
d. 80%
e. 50%