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 blowerÂ
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