Top 350+ Solved Heat Engines MCQ Questions Answer
Q. Safety valve generally used on high pressure boiler is
a. Dead weight type
b. Lever type
c. Combination lever and spring type
d. Spring type
e. None of the above
Q. Which of the following engine indicator has least inertia effects?
a. Mechanical indicator
b. Farnborough indicator
c. CRO engine indicator
d. All of the above
e. Carbon dioxide
Q. Calorific value of methane gas can be determined by
a. Bomb calorimeter
b. Bunsen's apparatus
c. Orsat's apparatus
d. None of the above
e. At constant temperature
Q. Which one of the following factors will not assist in improving thermal efficiency of a compression ignition engine?
a. Fine atomisation and even distribution of fuel
b. Minimum heat loss during combustion
c. Clear exhaust
d. High surface to volume ratio
e. Any of the above
Q. A diesel power plant is best suited as
a. Base load plant
b. Stand by plant
c. Peak load plant
d. General purpose plant
e. None of the above
Q. Excessive moisture in steam in a steam turbine is likely to result in
a. Erosion of turbine blades
b. Excess work done by rotor due to momentum of water particles
c. Overheating of turbine blaces
d. Reduced load on condenser
e. Reduced size of steam turbine
Q. According to Boyle's law
a. At constant pressure the temperature of a gas varies inversely as its volume
b. At constant pressure the absolute temperature of a gas varies inversely as its volume
c. At constant temperature, the pressure of a gas varies inversely as its volume
d. At constant temperature, the absolute pressure of a gas varies inversely as its volume
e. None of the above
Q. An optical pyrometer works on the principle of
a. Expansion of fluids
b. Mono-chromatic radiation
c. Thermo-electric effect
d. Total radiation
e. Change of electrical resistance
Q. Air fuel ratio for a jet engine is of the order of
a. 15 ; 1
b. 20 ; 1
c. 400 ; 1
d. 60 ; 1
e. 10 ; 1
Q. The top ring nearest to the piston crown is known as
a. Oil ring
b. Scrapper ring
c. Compression ring
d. Groove ring
e. Any of the above
Q. The vapour pressure is related to the enthalpy of vaporization in
a. Maxwell's equation
b. Henry's law
c. Dalton's law
d. Clausius Clapeyron equation
e. Raoult's law
Q. Flash point of a liquids is the temperature at which
a. The fuel ignites with clearly visible flash
b. Fuel vaporises at the prescribed rate
c. The fuel emits vapours at a rate which produces an inflammable mixture with air
d. The fuel ignites without a park
e. The fuel spontaneously ignites
Q. According to kinetic theory of heat
a. At absolute zero there is absolutely no vibration of molecules
b. At low temperatures all bodies are in solid state
c. 25 to 30
d. Temperature should rise during boiling
e. Temperature should fall during freezing
Q. Regenerative feed heating of steam turbines is done primarily to
a. Improve thermal efficiency of the condenser
b. Increase the expansion range for steam in the turbine
c. Improve overall efficiency of the plant
d. Reduce pressure of steam in exhaust
e. Reduce boiler losses in the gases
Q. Ricardo's theory is associated with
a. Steam turbines
b. Wankel engines
c. Internal combustion engines
d. Closed cycle gas turbines
e. Engine vibrations