Top 150+ Solved Thermal Engineering 1 MCQ Questions Answer
Q. For the flow through the convergent and divergent nozzle, whole of friction loss is assumed
a. in the converging portion
b. in the divergent portion
c. between inlet and outlet
d. none of the above
Q. The presence of friction in the nozzle
a. increases the final dryness fraction of steam
b. decreases the final dryness fraction of steam
c. it does not affect the dryness fraction of steam
d. none of the above
Q. When the back pressure of a nozzle is below the critical pressure, the nozzle is said to be
a. under expanding flow
b. over expanding flow
c. choked flow
d. none of the above
Q. Which ideal process is carried out at the turbine in vapour power cycle?
a. reversible adiabatic compression
b. reversible adiabatic expansion
c. reversible constant pressure heat addition
d. reversible constant pressure heat rejection
Q. The steam turbines is a
a. rotary machine
b. reciprocating machine
c. rotodynamic machine
d. none of the above
Q. From inlet to exit of steam nozzle, the pressure
a. increases
b. decreases
c. remains constant
d. none of the above
Q. From inlet to exit of moving blades in case of impulse turbine, the pressure
a. increases
b. decreases
c. remains constant
d. none of the above
Q. From inlet to exit of moving blades in case of a reaction turbine, the pressure
a. increases
b. decreases
c. remains constant
d. none of the above
Q. In an impulse turbine, steam expands
a. in the nozzle only
b. in the moving blades only
c. in the fixed and moving blades
d. none of the above
Q. In a reaction turbine, steam expands
a. in the nozzle only
b. in the moving blades only
c. in the fixed and moving blades
d. none of the above
Q. A simple impulse turbine consists of
a. one set of nozzles and one set of moving blades
b. two sets of nozzle and one set of moving blades
c. one set each of fixed and moving blades
d. none of the above
Q. In a velocity-compounded impulse steam turbine, steam expands in
a. one set of nozzles only
b. more than one set of nozzles
c. fixed and moving blades
d. none of the above
Q. In a pressure-compounded impulse steam turbine, steam expands in
a. nozzles and fixed blades only
b. moving blades only
c. fixed and moving blades both
d. none of the above
Q. In a pressure-compounded impulse steam turbine, pressure drop over each ring of moving blades
a. remains constant
b. is increasing
c. is decreasing
d. none of the above
Q. In a pressure-compounded impulse steam turbine, as compared to velocity compounding, the number of stages is
a. less
b. more
c. same
d. none of the above