Refrigerants - MCQs with AnswersQ1. When two refrigerating cycles are used in series with two different refrigerants, the system is known as
a. dual refrigeration system
b. cascade refrigeration system
c. vapour absorption refrigeration system
d. none of the aboveView Answer / Hide Answer
Q2. What is the desirable characteristics of a refrigerant?
ANSWER: b. cascade refrigeration system
a. it should not be toxic
b. it should not be non-corrosive
c. it should have minimum enthalpy of vaporization
d. all of the aboveView Answer / Hide Answer
Q3. Which refrigerant is widely used in refrigeration facilities of food as cooling of fresh vegetables, dairy products, meat and fish and similar process industries?
ANSWER: a. it should not be toxic
a. sulphur dioxide
b. ethyl chloride
d. ammoniaView Answer / Hide Answer Q4. What is the disadvantage of ammonia using as a refrigerant?
a. ammonia cannot be detected in case of leakage
b. ammonia has a bad effect on ozone layer
c. ammonia is toxic in nature
d. ammonia has higher energy costView Answer / Hide Answer
ANSWER: c. ammonia is toxic in nature