Questions and answers for exam Preparation

MCQs

Total Questions : 207 | Page 15 of 21 pages

Question 141. What is a solar powered refrigerator?

A refrigerator that is directly sourced by electricity
A refrigerator that is sourced by solar energy
A refrigerator that is sourced by wind and sun
A refrigerator that is sourced by biomass and sun

Discuss Question

Answer: Option B. -> A refrigerator that is sourced by solar energy
Answer: (b).A refrigerator that is sourced by solar energy

Question 142. Solar heat industrial systems are used for desalination.

True
False
May be True or False
Can't say

Discuss Question

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

Question 143. What are the types of popular refrigeration systems?

Vapour compression and vapour adsorption
Vapour adsorption and vapour absorption
Vapour compression and liquid compression
Vapour compression and vapour absorption

Discuss Question

Answer: Option D. -> Vapour compression and vapour absorption
Answer: (d).Vapour compression and vapour absorption

Question 144. What type of energy does vapour absorption refrigeration system use?

mechanical
thermal
nuclear
electrodynamic

Discuss Question

Answer: Option B. -> thermal
Answer: (b).thermal

Question 145. Which of the following refrigeration systems are used in air-conditioning systems?

Vapour absorption
Vapour jet
Vapour compression
Liquid adsorption

Discuss Question

Answer: Option C. -> Vapour compression
Answer: (c).Vapour compression

Question 146. Which of the following best describes the process of vapour compression refrigeration?

Warm air → compressor → condenser → expansion valve → evaporator → colder air
Evaporator → compressor → condenser → expansion valve → evaporator → colder air
Warm air → compressor → expansion valve → evaporator → colder air
Warm air → evaporator → compressor → condenser → expansion valve → evaporator → colder air

Discuss Question

Answer: Option D. -> Warm air → evaporator → compressor → condenser → expansion valve → evaporator → colder air
Answer: (d).Warm air → evaporator → compressor → condenser → expansion valve → evaporator → colder air

Question 147. Vapour compression refrigeration systems use ______ energy to perform compression.

mechanical
thermal
gravitational
nuclear

Discuss Question

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

Question 148. What is the working fluid in vapour absorption type systems?

Platinum
CFCs
Freons
Ammonia

Discuss Question

Answer: Option D. -> Ammonia
Answer: (d).Ammonia

Question 149. Which of the following best describes the process of vapour absorption refrigeration?

Absorbing fluid vapour into liquid carrier → producing vapours from solution by heating → thus cooling → pumping into a high pressure cycle
Absorbing fluid vapour into liquid carrier → pumping into a high pressure cycle → producing vapours from solution by heating → thus cooling
Absorbing fluid vapour into liquid carrier → thus cooling → pumping into a high pressure cycle → producing vapours from solution by heating
Absorbing fluid vapour into liquid carrier → producing vapours from solution by heating → thus cooling → pumping into a high pressure cycle

Discuss Question

Answer: Option B. -> Absorbing fluid vapour into liquid carrier → pumping into a high pressure cycle → producing vapours from solution by heating → thus cooling
Answer: (b).Absorbing fluid vapour into liquid carrier → pumping into a high pressure cycle → producing vapours from solution by heating → thus cooling

Question 150. Absorption of ammonia in a liquid solution analogous to _______