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HVAC FINAL

Authored by Michael Bloom

Professional Development

Professional Development

Used 5+ times

HVAC FINAL
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40 questions

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1.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

The weight of water vapor in a given amount of air is __________.

condensation point

boiling point

evaporation rate

absolute humidity

2.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Tech A says air-conditioning systems absorb heat from cab through a condenser and transfer heat to the atmosphere using a heat exchanger call an evaporator. Tech B says a refrigerant gas circulated through the A/C system by a pump, absorbs heat and releases it to the atmosphere. Who is correct ?

Tech A

Tech B

Both

Neither

3.

MULTIPLE SELECT QUESTION

3 mins • 1 pt

Laws of thermodynamics, also call Laws of conservation include ?

Heat moves from cold to hot

heat moves from hot to cold

the transfer of heat without an intervening medium

heat cannot be created or destroyed

4.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Electronic leak detectors for R-1234yf should meet this standard ______

J1628

J2913

J2297

J2298

5.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

At 85'F the low side pressure reads 58 psi, and the high side reads 170 psi what action if any is needed ?

Add refrigerant

Needs service possible blockage

A/C is operating normal

Needs service possibly faulty compressor

6.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Which of the following statements about types of cooling systems is correct ?

a vacuum valve incorporated into the cap allows air or coolant to re-enter the cooling system after engine cools

the freezing points of Ethylene Glycol and Propylene Glycol are the same

tap water and anti-freeze is the primary coolant medium to absorb engine heat

a heat exchanger or radiator transfers heat from water to cool the engine

7.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Refrigerants containing dyes should be added to an A/C system only if its at least ____ percent

30

40

50

60

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