RAC Lab
Q1. In a domestic vapour compression refrigerator, the refrigerant commonly used is
a. Ammonia
b. CO2
c. Freon-12
d. All of the above
Q2. Which of the following is the main disadvantage of natural refrigeration methods?
a. Natural refrigeration methods are expensive
b. Natural refrigeration methods are not environment friendly
c. Natural refrigeration methods are dependent on local conditions
d. Natural refrigeration methods are poisonous
Q3. Which is the desirable physical property of refrigerant?
a. Toxic
b. Low boiling point
c. Explosive
d. High freezing point
Q4. Which of the following uses natural convection air-cooled condensers?
a. High capacity room air conditioners
b. Industrial air conditioners
c. High capacity water coolers
d. Domestic refrigerators
Q5. Which of the following types of refrigerants take a direct part in the refrigeration system?
a. Secondary
b. Primary
c. Tertiary
d. Mixed
