Top 550+ Solved Thermal Engineering 2 MCQ Questions Answer
Q. Superficial steam turbines releases _______ CO2.
a. high
b. low
c. does not release
d. none of the mentioned
Q. Which statement about reaction turbine is false?
a. steam does not expand in nozzle
b. blades acts like nozzles
c. steam expands as flows over the rotor blades
d. steam continuously losses its heat as flows over the rotor blades
Q. Reaction turbines are characterized by ___________
a. relatively low rpm and steam expension over nozzle
b. relatively high rpm and steam expension over nozzle
c. relatively low rpm and steam expension over rotor blades
d. relatively high rpm and steam expansion over rotor blades
Q. In condensing turbine what is the back pressure of the turbine?
a. very high
b. above atmospheric pressure
c. equal to atmospheric pressure
d. below atmospheric pressure
Q. Having two separate units for process heat and power is?
a. useful
b. useless
c. pollution reducing
d. none of the mentioned
Q. Back pressure turbine is placed between ____________
a. turbine & pump
b. boiler & pump
c. turbine & heat exchanger
d. boiler & turbine
Q. Addition of an infinitesimal amount of heat at the highest temperature is because ___________
a. to initiate reheating
b. to initiate regeneration
c. to initiate superheating
d. none of the mentioned
Q. High moisture content is involved during expansion of steam because ___________
a. to ensure uniform heating
b. to ensure uniform cooling
c. to obtain a higher temperature of heat addition
d. to obtain a lower temperature of heat addition
Q. What is the relation of the mean temperature of heat addition and cycle efficiency?
a. both are inversely proportional
b. both are directly proportional
c. both are independent of each other
d. none of the mentioned
Q. Temperature of heat rejection in a condenser can be lowered by using?
a. lubricant
b. oil
c. refrigerant
d. diesel
Q. The use of which of the following becomes necessary during expansion of steam?
a. reheat
b. regeneration
c. refrigeration
d. superheat
Q. What is the specific heat of the ideal working fluid used in vapour power cycle?
a. should be constant
b. should be large
c. should be small
d. none of the mentioned
Q. What is the importance of the freezing point of the working fluid in the vapour power cycle?
a. freezing point of working fluid should be below the room temperature
b. freezing point of working fluid should be above the room temperature
c. freezing point of working fluid should be equal to the room temperature
d. does not have any importance
Q. The engines which are operating on gas power cycle are?
a. cyclic
b. non-cyclic
c. either cyclic or non-cyclic
d. none of the mentioned