CSN AC 110 Esco Exam Practice Latest Update
2024-2025 Actual Exam from Credible Sources
with 100 Questions and Verified Correct Answers
Golden Ticket to Guaranteed A+ Verified by
Professor
1. Heat which causes a change in temperature of a substance is called;
A. latent heat
B. sensible heat
C. superheat
D. radiant heat - CORRECT ANSWER: B. sensible heat
10. The state of the refrigerant in the suction line should be;
A. high pressure / high temperature liquid
B high pressure / low temperature vapor
C. low pressure / low temperature liquid
D. low pressure / low temperature vapor - CORRECT ANSWER: D. low pressure / low
temperature vapor
100 A dirty evaporator in an air conditioning system will cause the symptoms
A high suction pressure and low discharge pressure
B high suction pressure and high discharge pressure
C low suction pressure and low discharge pressure
D low suction pressure and high discharge pressure - CORRECT ANSWER: C low
suction pressure and low discharge pressure
11. The state of the refrigerant entering the condenser is;
A. high temperature / highly superheated liquid
,B. high pressure / highly superheated vapor
C. high pressure / high temperature liquid
D. low pressure / low temperature vapor - CORRECT ANSWER: B. high pressure /
highly superheated vapor
12. the evaporator;
A. transfers heat from the refrigerated space to the refrigerant
B. transfers heat from the refrigerant to the refrigerated space
C. transfers heat from the refrigerant to the ambient air
D. transfers heat from the ambient air to the refrigerated space - CORRECT ANSWER:
A. transfers heat from the refrigerated space to the refrigerant
13. Which of the following is not a thermodynamic property of refrigerants?
A. critical point
B. saturation point
C. enthalpy
D. flammability - CORRECT ANSWER: D. flammability
14. The sequential order of steps in the vapor - compression process are;
A. expansion, condensation, compression, vaporization
B. vaporization, expansion, condensation, compression
C. compression, condensation, expansion, vaporization
D. expression, compression, vaporization, condensation - CORRECT ANSWER: C.
compression, condensation, expansion, vaporization
15. If a 30 pound cylinder of reclaimed R-410A refrigerant has been stored over night at
70°F, the pressure of the cylinder shoudl be approximately:
A. 201 psig
B. 168 psig
C. 143 psig
, D. 118 psig - CORRECT ANSWER: A. 201 psig
16. Fan airflow pressures are usually measured in;
A. inches of mercury vacuum or micorns
B. microns or psig
C. psig or inches of mercury vacuum
D. inches of water column (WC) - CORRECT ANSWER: D. inches of water column
(WC)
17. Zero psia (pounds per square inch absolute) is;
A. the same as atmospheric pressure
B. approximately 14.7 psig at sea level
C. a pressure which cannot be further reduced
D. equal to 500 microns - CORRECT ANSWER: B. approximately 14.7 psig at sea level
18. zero psig (Pounds per squeare indch gauge is;
A. 25,400 microns
B. approximately 29.9 psia at sea-level
C. a pressure which cannot be further reduced
D. the same as atmospheric pressure - CORRECT ANSWER: D. the same as
atmospheric pressure
19. The temperature at which moisture will start to condense from the air is called;
A. dry bulb temperature
B. wet buldb dry depression
C. dew point temperature
D. condensate point - CORRECT ANSWER: C. dew point temperature
2024-2025 Actual Exam from Credible Sources
with 100 Questions and Verified Correct Answers
Golden Ticket to Guaranteed A+ Verified by
Professor
1. Heat which causes a change in temperature of a substance is called;
A. latent heat
B. sensible heat
C. superheat
D. radiant heat - CORRECT ANSWER: B. sensible heat
10. The state of the refrigerant in the suction line should be;
A. high pressure / high temperature liquid
B high pressure / low temperature vapor
C. low pressure / low temperature liquid
D. low pressure / low temperature vapor - CORRECT ANSWER: D. low pressure / low
temperature vapor
100 A dirty evaporator in an air conditioning system will cause the symptoms
A high suction pressure and low discharge pressure
B high suction pressure and high discharge pressure
C low suction pressure and low discharge pressure
D low suction pressure and high discharge pressure - CORRECT ANSWER: C low
suction pressure and low discharge pressure
11. The state of the refrigerant entering the condenser is;
A. high temperature / highly superheated liquid
,B. high pressure / highly superheated vapor
C. high pressure / high temperature liquid
D. low pressure / low temperature vapor - CORRECT ANSWER: B. high pressure /
highly superheated vapor
12. the evaporator;
A. transfers heat from the refrigerated space to the refrigerant
B. transfers heat from the refrigerant to the refrigerated space
C. transfers heat from the refrigerant to the ambient air
D. transfers heat from the ambient air to the refrigerated space - CORRECT ANSWER:
A. transfers heat from the refrigerated space to the refrigerant
13. Which of the following is not a thermodynamic property of refrigerants?
A. critical point
B. saturation point
C. enthalpy
D. flammability - CORRECT ANSWER: D. flammability
14. The sequential order of steps in the vapor - compression process are;
A. expansion, condensation, compression, vaporization
B. vaporization, expansion, condensation, compression
C. compression, condensation, expansion, vaporization
D. expression, compression, vaporization, condensation - CORRECT ANSWER: C.
compression, condensation, expansion, vaporization
15. If a 30 pound cylinder of reclaimed R-410A refrigerant has been stored over night at
70°F, the pressure of the cylinder shoudl be approximately:
A. 201 psig
B. 168 psig
C. 143 psig
, D. 118 psig - CORRECT ANSWER: A. 201 psig
16. Fan airflow pressures are usually measured in;
A. inches of mercury vacuum or micorns
B. microns or psig
C. psig or inches of mercury vacuum
D. inches of water column (WC) - CORRECT ANSWER: D. inches of water column
(WC)
17. Zero psia (pounds per square inch absolute) is;
A. the same as atmospheric pressure
B. approximately 14.7 psig at sea level
C. a pressure which cannot be further reduced
D. equal to 500 microns - CORRECT ANSWER: B. approximately 14.7 psig at sea level
18. zero psig (Pounds per squeare indch gauge is;
A. 25,400 microns
B. approximately 29.9 psia at sea-level
C. a pressure which cannot be further reduced
D. the same as atmospheric pressure - CORRECT ANSWER: D. the same as
atmospheric pressure
19. The temperature at which moisture will start to condense from the air is called;
A. dry bulb temperature
B. wet buldb dry depression
C. dew point temperature
D. condensate point - CORRECT ANSWER: C. dew point temperature
