CSN AC 110 Esco Exam Practice Latest Update

CSN AC 110 Esco Exam Practice Latest Update - with 100 Questions and Verified Correct Answers Golden Ticket to Guaranteed A+ Verified by Professor

• Heat which causes a change in temperature of a substance is called;
• latent heat
• sensible heat
• superheat

D. radiant heat - CORRECT ANSWER: B. sensible heat

• The state of the refrigerant in the suction line should be;
• high pressure / high temperature liquid

B high pressure / low temperature vapor

• 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

• The state of the refrigerant entering the condenser is;
• high temperature / highly superheated liquid 1 / 3

• high pressure / highly superheated vapor
• high pressure / high temperature liquid

D. low pressure / low temperature vapor - CORRECT ANSWER: B. high pressure /

highly superheated vapor

• the evaporator;
• transfers heat from the refrigerated space to the refrigerant
• transfers heat from the refrigerant to the refrigerated space
• transfers heat from the refrigerant to the ambient air
• transfers heat from the ambient air to the refrigerated space - CORRECT ANSWER:
• transfers heat from the refrigerated space to the refrigerant

• Which of the following is not a thermodynamic property of refrigerants?
• critical point
• saturation point
• enthalpy

D. flammability - CORRECT ANSWER: D. flammability

• The sequential order of steps in the vapor - compression process are;
• expansion, condensation, compression, vaporization
• vaporization, expansion, condensation, compression
• compression, condensation, expansion, vaporization

D. expression, compression, vaporization, condensation - CORRECT ANSWER: C.

compression, condensation, expansion, vaporization

• 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:

• 201 psig
• 168 psig
• 143 psig 2 / 3

D. 118 psig - CORRECT ANSWER: A. 201 psig

• Fan airflow pressures are usually measured in;
• inches of mercury vacuum or micorns
• microns or psig
• psig or inches of mercury vacuum

D. inches of water column (WC) - CORRECT ANSWER: D. inches of water column

(WC)

• Zero psia (pounds per square inch absolute) is;
• the same as atmospheric pressure
• approximately 14.7 psig at sea level
• a pressure which cannot be further reduced
• equal to 500 microns - CORRECT ANSWER: B. approximately 14.7 psig at sea level

• zero psig (Pounds per squeare indch gauge is;
• 25,400 microns
• approximately 29.9 psia at sea-level
• a pressure which cannot be further reduced

D. the same as atmospheric pressure - CORRECT ANSWER: D. the same as

atmospheric pressure

• The temperature at which moisture will start to condense from the air is called;
• dry bulb temperature
• wet buldb dry depression
• dew point temperature

D. condensate point - CORRECT ANSWER: C. dew point temperature

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