CSN AC 110 Esco Exam Practice Questions with correct Answers

CSN AC 110 Esco Exam Practice Questions with correct Answers 1. Heat which causes a change in temperature of a substance is called; A. latent heat B. sensible heat C. superheat D. radiant heat - ANS ️️ B. sensible heat 2. Heat added to a substance without a raise in temperature; (example: liquid refrigerant to gas) this process is called? A. latent heat of vaporization B. latent heat of fusion. C. superheat of vaporization D. superheat of fusion - ANS ️️ A. latent heat of vaporization 3. Heat added to the refrigerant in a vapor state after the evaporation process is called; A. latent heat B. subcooling C. superheat D. specific heat - ANS ️️ C. superheat 4. A scroll compressor move refrigerant by means of; A. a piston B. an impeller C. vane and cam D. involute spirals - ANS ️️ D. involute spirals 5. The movement of heat by way of fluid (or air) is called; A. conduction B. convection C. radiation D. percussion - ANS ️️ B. convection 6. The movement of heat through a solid object is called; A. conduction B. convection C. radiation D. compression - ANS ️️ A. conduction 7. The standard unit for measuring the quantity of heat in a substance is; A. degrees Fahrenheit B. degrees Celsius C. degrees Rankin D. the British Thermal Unit (Btu) - ANS ️️ D. the British Thermal Unit (Btu) 8. A refrigerant gives up heat when; A. it condenses B. it evaporates C. it is compressed D. it vaporizes - ANS ️️ A. it condenses 9. Why must refrigerant in the suction line be slightly warmer than the saturation temperature? A. prevent liquid slugging of hte compressor B. prevent refrigerant vapor lock C. prevent the compressor from overheating D. prevent oil miscibility - ANS ️️ A. prev