flat plate collectors

1-Direct Solar energy is used for

• (A) Water heating

• (B) Distillation

• (C) Drying

• (D) All of the above

The collection efficiency of Flat plate collector can be improved by

• (A) putting a selective coating on the plate

• (B) evacuating the space above the absorber plate

• (C) both (A) and (B)

• (D) None of the above

The efficiency of various types of collectors ______ with _______ temperature.

• (A) increases, decreasing

• (B) decreases, increasing

• (C) remains same, increasing

• (D) depends upon type of collector

Global radiation =

• (A) Direct radiation – Diffuse Radiation

• (B) Direct radiation + Diffuse Radiation

• (C) Direct radiation + Diffuse Radiation

• (D) Diffuse Radiation / Direct radiation

To how many types are flat plate collectors divided depending on type of heat transfer fluid?

• (A) 2

• (B) 3

• (C) 4

• (D)5

For what purpose are Gas heating collectors used?

• a) To trap solar radiance

• b) To act as a medium to help in conversion of sunlight to electrical energy

• c) Employed as solar air heaters

• d) They act as alternate panels in case of failure

Liquid heating collectors are mainly used for _________

• a) heating water

• b) generating electricity

• c) cooking

• d) trapping sunlight

_______ is a glazing which limits the radiation and convection heat losses.

• a) Absorber plate

• b) Selective surface

• c) Insulation

• d) Transparent cover

What are provided to minimize heat loss?

• a) Absorber plate

• b) Surface plate

• c) Insulation

• d)casing