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Unit 41

Authored by Timothy McIntyre

Professional Development

Professional Development

Used 2+ times

Unit 41
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31 questions

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1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

As a rule of thumb, the air leaving the evaporator will be about ___ than the air entering the evaporator.

10-15° warmer

10-15° cooler

17-20° cooler

17-20° warmer

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

A service valve can be used to ___.

check the electrical service to the compressor

isolate the refrigerant so the system can be serviced

check the air flow across the evaporator

check the ambient temperature at the condenser

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

A typical evaporator superheat reading at the evaporator outlet for a central air-conditioning system on a 95°F day would be ___°F.

5-7

8-10

10-12

12-15

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

On a 95°F day, the R-22 refrigerant pressure on the high side should be about ___ psig.

108

182

243

297

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

The liquid line temperature is used to determine the ___ of a condenser.

superheat

lowside pressure

suction pressure

subcooling

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

To accurately add refrigerant to a system, a condenser ambient temperature of ___°F should be simulated.

75

85

95

100

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

The instrument to use to check for a short in the compressor motor winding is a(n) ___.

ohmmeter

ammeter

voltmeter

milliammeter

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