671. Which material is used to made a solar cell_______________?
A. aluminum
B. Germanium
C. silicon
D. scandium

672. The fuel used in nuclear reactor is_____________?
A. radium
B. cadmium
C. uranium
D. all of the above

673. Which of the following device is used to measure vacuum?
A. Barometer
B. Hygrometer
C. U-tube manometer
D. Venturi metre

674. The voltage of a single solar cells is about:
A. 0.5 volt
B. 1 volt
C. 1.8 volt
D. 1. 5 volt

675. In hydro power plant, the graph between discharge and time is known as___________?
A. monograph.
B. load graph.
C. discharge graph.
D. hydro graph

676. Which of the following generating station has minimum running cost?
A. Nuclear
B. Hydro
C. Thermal
D. Diesel

677. The ideal load factor should be_____________?
A. unity
B. zero
C. negative.
D. infinity.

678. If the diversity factor of a power station is high then its generation cost is___________?
A. high
B. low
C. remain same
D. depend on the plan type

679. Diesel power plant are generally used as___________?
A. peak load plant
B. base load plant
C. standby plant 
D. none of the above

680. A gas turbine basically work on
A. Carnot cycle
B. Rankin cycle
C. Brayton cycle
D. Dual cycle

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