Questions and answers for exam Preparation

MCQs

Total Questions : 175 | Page 13 of 18 pages

Question 121. Hourly radiation values can be used to evaluate the performance of ________

flat plate collectors
curved collectors
parabolic collectors
metallic collectors

Discuss Question

Answer: Option A. -> flat plate collectors
Answer: (a).flat plate collectors

Question 122. Why are global and diffuse radiation values not measured?

Because of sophisticated measuring instruments
Because measuring instruments are not available everywhere
Because of unavailability of skilled labour to operate measuring instruments
Because measuring instruments are not available everywhere

Discuss Question

Answer: Option D. -> Because measuring instruments are not available everywhere
Answer: (d).Because measuring instruments are not available everywhere

Question 123. Which of the following can be used to estimate beam radiation?

Photoelectric effect
Solar insolation constant
Time taken by sun’s rays to reach earth
Zenith angle and altitude

Discuss Question

Answer: Option D. -> Zenith angle and altitude
Answer: (d).Zenith angle and altitude

Question 124. Which of the following is generally used to compute global and diffuse radiation values?

Parabolic dish
Flat plate collector
Theoretical models
Pyranometer

Discuss Question

Answer: Option C. -> Theoretical models
Answer: (c).Theoretical models

Question 125. What is zenith angle?

Angle between sun and vertical
Angle between the line joining the location on earth’s surface and the equatorial plane
Angle between extended sun’s rays to earth’s center and equatorial plane
Angle between projection of sun’s rays on horizontal surface and equatorial plane

Discuss Question

Answer: Option A. -> Angle between sun and vertical
Answer: (a).Angle between sun and vertical

Question 126. What is all-wave radiation?

Sum of shortwave and long-wave-up-dwelling radiation minus sum of shortwave and long-wave-down-dwelling radiation
Sum of shortwave and long-wave-down-dwelling radiation minus sum of shortwave and long-wave-up-dwelling radiation
Difference of shortwave and long-wave-up-dwelling radiation plus difference of shortwave and long-wave-down-dwelling radiation
Difference of shortwave and long-wave-down-dwelling radiation plus difference of shortwave and long-wave-up-dwelling radiation

Discuss Question

Answer: Option B. -> Sum of shortwave and long-wave-down-dwelling radiation minus sum of shortwave and long-wave-up-dwelling radiation
Answer: (b).Sum of shortwave and long-wave-down-dwelling radiation minus sum of shortwave and long-wave-up-dwelling radiation

Question 127. How do clouds block the outgoing long-wave radiation (OLR)?

By emission
By adsorption and scattering
By absorption and adsorption
By scattering and absorption

Discuss Question

Answer: Option D. -> By scattering and absorption
Answer: (d).By scattering and absorption

Question 128. Which of the following blocks the outgoing long-wave radiation?

Earth
Seas
Clouds
Airplanes

Discuss Question

Answer: Option C. -> Clouds
Answer: (c).Clouds

Question 129. Higher the cloud albedo ________

less is the amount of solar radiation reflected back to earth
more is the amount of solar radiation reflected back to earth
less is the amount of solar radiation received from sun
more is the amount of solar radiation received from sun

Discuss Question

Answer: Option B. -> more is the amount of solar radiation reflected back to earth
Answer: (b).more is the amount of solar radiation reflected back to earth

Question 130. What is albedo?

Measure of diffused reflection of solar radiation out of the total amount received by astronomical body
Measure of absorption of solar radiation out of the total amount received by astronomical body
Measure of diffused reflection of solar radiation out of the total amount received
Measure of absorbed of solar radiation out of the total amount received by

Discuss Question

Answer: Option A. -> Measure of diffused reflection of solar radiation out of the total amount received by astronomical body
Answer: (a).Measure of diffused reflection of solar radiation out of the total amount received by astronomical body