Renewable Energy Practice Test 5

1. What is the maximum temperature used in cooking? Note that C indicates Celsius

30 degree C for melting food items like butter

100 degree C for boiling water and related dishes

400 degree C for grilling and searing

800 degree C for melting metals

2. How is pressurization achieved in absorber refrigeration?

By dissolving refrigerant in absorbent in the absorber section

By evaporating refrigerant in absorbent in the evaporation section

By evaporating refrigerant from absorbent in the absorber section

By dissolving refrigerant in absorbent in the evaporation section

3. Solar cooking is pollution free.

True

False

4. What is the typical temperature generated by solar furnaces to test materials for extreme environments? Note that C indicates Celsius.

1400 degree C

2500 degree C

100 degree C

500 degree C

5. What are the types of solar furnaces?

Passive and heliostat

Indirect and concentrating solar power technology

Direct and heliostat

Active and direct

6. What is the operating temperature of turbines in a central receiver thermal power system? Note that “C” stands for Celsius.

5000 degree C

500 – 800 degree C

10 – 100 degree C

200 – 500 degree C

7. _______ are used as air exhausts in indirect solar dryers.

Ceiling fans

Turbines

Table fans

Chimneys

8. In solar vapour compression cycle, efficiency of Rankine cycle increases with _______

increase in temperature of heat exchanger

the amount of heat supplied to the evaporator

the amount of cold air released from the system

decrease in temperature of heat exchanger

9. What are the types of concentrating technologies?

Solar power tower and parabolic trough/dish

Parabolic dish and solar furnace

Solar furnace and solar stills

Parabolic trough and solar stills

10. Which of the following surface is best suited to absorb sunlight?

Red surface

Black surface

White surface

Silver surface