681. Which of the following is usually not the generating voltage__________?
A. 6.6 kV
B. 9.9 kV
C. 11kV
D. 13.2kV

682. The overall efficiency of a steam power station is ________ its thermal efficiency.
A. less than
B. equal to
C. greater than
D. none of the above

683. Which of the following power plant usually offer highest maintenance cost___________?
A. Nuclear power plants
B. Hydro-electric power plants
C. Thermal power plants
D. Diesel engine power plant

684. Which of the following Power Plant causes least environmental pollution____________?
A. Thermal Power Plant
B. Hydro Power Plant
C. Nuclear Power Plant
D. Diesel Power Plant

685. A steam power stations basically work on the______________?
A. thermodynamic cycle
B. Rankin cycle
C. Vapor pressure cycle
D. Carton cycle

686. Which of the following power plant has least efficiency_________?
A. Nuclear power plant
B. Hydro power plant
C. Steam power plant
D. Diesel power plant

687. No-load speed of which of the following motor will be highest ?
A. Shunt motor
B. Series motor
C. Cumulative compound motor
D. Differentiate compound motor

689. The direction of rotation of a D.C. series motor can be changed by___________?
A. interchanging supply terminals
B. interchanging field terminals
C. either of A. and B. above
D. None of the above

690.Which of the following application requires high starting torque ?
A. Lathe machine
B. Centrifugal pump
C. Locomotive
D. Air blower 

NOTE
IF YOU THINK ANY OF THE MCQ ABOVE IS WRONG.
PLEASE COMMENT WITH CORRECT ANSWER AND ITS DETAIL EXPLANATION IN COMMENT BOX.
THANK YOU