Questions and answers for exam Preparation

MCQs

Total Questions : 175 | Page 2 of 18 pages

Question 11. Thermopile is a collection of _______

thermocouples connected in parallel
thermocouples connected in series
reflectors connected in series
reflectors connected in parallel

Discuss Question

Answer: Option B. -> thermocouples connected in series
Answer: (b).thermocouples connected in series

Question 12. What is the irradiation proportional to in thermopile technology?

Difference between sun exposed area and shadow area
Difference between temperature of sun exposed area and shadow area
Difference between temperature of sun exposed area and temperature of shadow area
Difference between of sun exposed area and temperature of shadow area

Discuss Question

Answer: Option C. -> Difference between temperature of sun exposed area and temperature of shadow area
Answer: (c).Difference between temperature of sun exposed area and temperature of shadow area

Question 13. What does the net radiometer measure?

Measures the incoming solar radiation
Measures the difference between incoming and outgoing radiation
Measures the sum of incoming and outgoing radiation
Measures the outgoing solar radiation

Discuss Question

Answer: Option B. -> Measures the difference between incoming and outgoing radiation
Answer: (b).Measures the difference between incoming and outgoing radiation

Question 14. Which portion of the solar spectrum can a photodiode-based pyranometer detect?

100 – 200nm
1 – 10um
150 – 200nm
400 – 900 nm

Discuss Question

Answer: Option D. -> 400 – 900 nm
Answer: (d).400 – 900 nm

Question 15. Photodiode works on the principle of _______

photoelectric effect
LED
thermocouple
differential resistance

Discuss Question

Answer: Option A. -> photoelectric effect
Answer: (a).photoelectric effect

Question 16. Which of the following technology does a net radiometer work on?

Semiconductor
Conductor-insulator
Thermopile sensor
Photoelectric effect

Discuss Question

Answer: Option C. -> Thermopile sensor
Answer: (c).Thermopile sensor

Question 17. Bolometers are used for ionizing particles, photons and non-ionizing particles.

True
False
May be True or False
Can't say

Discuss Question

Answer: Option A. -> True
Answer: (a).True

Question 18. What is a bolometer made up of?

A thermal reservoir and a metal layer
An electrical reservoir and an insulated layer
An absorptive element, thermal reservoir and a thermally insulated material linking both of them
An absorptive element, thermal reservoir and a thermal link

Discuss Question

Answer: Option D. -> An absorptive element, thermal reservoir and a thermal link
Answer: (d).An absorptive element, thermal reservoir and a thermal link

Question 19. Which of the following best describes the working of bolometer?

Radiation → temperature of absorptive element increases above the thermal reservoir → resistive thermometer to measure temperature change
Radiation → resistive thermometer to measure temperature change → temperature of absorptive element increases above the reservoir
Temperature of absorptive element increases above the reservoir → radiation → resistive thermometer to measure temperature change
Radiation → temperature of absorptive element increases above the electrical reservoir → resistive thermometer to measure temperature change

Discuss Question

Answer: Option A. -> Radiation → temperature of absorptive element increases above the thermal reservoir → resistive thermometer to measure temperature change
Answer: (a).Radiation → temperature of absorptive element increases above the thermal reservoir → resistive thermometer to measure temperature change

Question 20. In a bolometer, the greater the absorbed power, higher the temperature.