Top 550+ Solved Thermal Engineering 2 MCQ Questions Answer
Q. The reheat factor depends upon ____________
a. exit pressure
b. turbine stage efficiency
c. initial pressure and superheat
d. all of the mentioned
Q. What is the critical pressure ratio for initially dry saturated steam?
a. 0.546
b. 0.577
c. 0.586
d. 0.578
Q. In an impulse turbine, steam expands ____________
a. wholly in nozzle
b. partly in the nozzle and partly in blades
c. wholly in blades
d. none of the mentioned
Q. A steam nozzle converts ____________
a. heat energy of steam into potential energy
b. potential energy into heat energy of steam
c. heat energy of steam into kinetic energy
d. kinetic energy into heat energy of steam
Q. If the critical pressure ratio for steam is 0.546, then the steam is initially ____________
a. wet
b. dry saturated
c. superheated
d. none of the mentioned
Q. A stage, in reaction turbine, is represented by ____________
a. each row of blades
b. number of entries of steam
c. number of exits of steam
d. none of the mentioned
Q. Steam turbines may be classified according to ____________
a. number of stages
b. direction of steam flow
c. mode of steam action
d. all of the mentioned
Q. A steam nozzle converts ____________
a. heat energy of steam into kinetic energy
b. kinetic energy of steam into heat energy
c. potential energy into heat energy
d. none of the mentioned
Q. A steam turbine with no nozzle is?
a. reaction turbine
b. impulse turbine
c. reaction & impulse turbines
d. none of the mentioned
Q. _______ of electricity in United States is produced using steam turbine.
a. 88%
b. 50%
c. 100%
d. 77%
Q. When steam pressure ________ it becomes superficial fluid.
a. decreases
b. increases
c. steam can not become superficial fluid
d. none of the mentioned
Q. Steam turbines used in nuclear reactors use __________
a. superficial fluids
b. high pressure steam
c. specific heat
d. none of the mentioned
Q. Superficial steam power plants operate at _____ temperatures.
a. high
b. low
c. constant
d. none of the mentioned
Q. Energy efficiency of superficial steam is _________
a. low
b. high
c. same as other steams
d. none of the mentioned
Q. Superficial steam turbines can be operated at ________
a. medium speeds
b. low speeds
c. high speeds
d. none of the mentioned