A7 PRACTICE TEST

A7 PRACTICE TEST

Professional Development

60 Qs

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A7 PRACTICE TEST

A7 PRACTICE TEST

Assessment

Quiz

Professional Development

Professional Development

Medium

Created by

Mike Beltowski

Used 17+ times

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60 questions

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1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

The oil required in most R-134a refrigerant systems is:

A polyalkylene glycol (PAG) oil.

A synthetic engine oil.

A synthetic mineral oil.

Petroleum oil.

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

An air-conditioning clutch does not engage the compressor. A voltage measurement shows there is 12 volts at the clutch coil feed wire. Technician A says that the clutch coil could be bad. Technician B says that the clutch coil ground could be bad. Who is correct?
A only
B only
Both A and B
Neither A nor B

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

A refrigerant storage container is being tested for static pressure with a manifold gauge and it has been in a 70 degrees (f) room for 6 hours. The pressure in the container is 94 psi. Which of these is LEAST LIKELY to cause this result?

The refrigerant has a 5% mixture of air blended with it.

The refrigerant has foreign chemicals blended with it.

The refrigerant has an 8% mixture of air blended with it.

The refrigerant container is overfilled by 1%.

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Any of these statements about refrigerant system tools are true EXCEPT:

Separate gauges and other refrigerant handling equipment should be used for different types of refrigerant.

Manifold gauge sets for R-134a can be identified by unique service fitting connections.

R-134a service hoses are much bigger because of the high system pressures.

Proper identification of service equipment and hoses is important to prevent cross contamination of refrigerant.

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

The compressor clutch diode is being discussed. Technician A says a purpose of the diode is to prevent alternating current from the alternator entering the clutch coil. Technician B says a purpose of the diode is to prevent spikes of high voltage created by the clutch coil operation from damaging delicate electronic components. Who is correct?
A only
B only
Both A and B
Neither A nor B

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which of these inputs to the engine PCM would be LEAST LIKELY to cause an interruption to A/C operation during a drive cycle?

Throttle position sensor

Engine coolant temperature sensor

Upstream oxygen sensor

Power steering pressure switch

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

A refrigerant identifier can tell if there is:
air in the refrigerant system.
an excessive refrigerant charge.
excessive oil in the refrigerant system.
a low refrigerant charge.

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