Top 550+ Solved Thermal Engineering 2 MCQ Questions Answer
Q. Where in industries do we find back-pressure turbines?
a. at a point in industry where waste steam has to be employed
b. when pressure needs to be applied at rear end
c. when one turbine bolster other
d. there is a requirement of process steam at single pressure
Q. A steam turbine is basically an assemblage of ____________
a. nozzle & condenser
b. blades & condenser
c. nozzle & blades
d. nozzle & fans
Q. A regenerative steam cycle renders ____________
a. decreased work output per unit mass of steam
b. increased thermal efficiency
c. increased work output per unit mass of steam
d. decreased work output per unit mass of steam as well as increased thermal efficiency
Q. The reheat factor is the ratio of the ____________
a. total useful heat drop to the total isentropic heat drop
b. cumulative heat drop to the isentropic heat drop
c. isentropic heat drop to the heat supplied
d. none of the mentioned
Q. Thermal equilibrium means that the flow of steam is ____________
a. hyperbolic
b. isothermal
c. isentropic
d. polytropic
Q. Multi-stage steam turbines are of the ___________
a. reaction type
b. velocity compounded type
c. pressure compounded type
d. all of the mentioned
Q. The impulse reaction turbine has its driving force ___________
a. partly as an impulsive force and partly as a reaction force
b. as an impulsive force
c. as a reaction force
d. none of the mentioned
Q. In a nozzle, whole frictional loss is assumed to occur between ___________
a. inlet and throat
b. throat and exit
c. inlet and outlet
d. none of the mentioned
Q. The ratio of total useful heat drop to the total isentropic heat drop is called?
a. rankine efficiency
b. stage efficiency
c. internal efficiency
d. none of the mentioned
Q. What is the action of steam in a steam turbine?
a. neither static nor dynamic
b. dynamic
c. static
d. both dynamic & static
Q. The critical pressure gives the velocity of steam at the throat ___________
a. equal to the velocity of sound
b. more than velocity of sound
c. less than the velocity of light
d. none of the mentioned
Q. The flow through a nozzle is regarded as ___________
a. isothermal flow
b. isobaric flow
c. isochoric flow
d. isentropic flow
Q. The steam leaves the nozzle at a ____________
a. low pressure and a high velocity
b. high pressure and a high velocity
c. high pressure and a low velocity
d. low pressure and a low velocity
Q. De-Laval turbine is a ____________
a. multi rotor impulse turbine
b. impulse reaction turbine
c. single rotor impulse turbine
d. none of the mentioned