Exam 21: Mechanical Troubleshooting

arrow
  • Select Tags
search iconSearch Question
flashcardsStudy Flashcards
  • Select Tags

Which of the following could be the reason that the subcooling would be low on an air conditioning system?

Free
(Multiple Choice)
4.8/5
(45)
Correct Answer:
Verified

A

Where is the high-side access port located on most residential central air conditioning systems?

Free
(Multiple Choice)
4.9/5
(38)
Correct Answer:
Verified

B

Which of the following is NOT a condition of the belt being too tight on a blower?

Free
(Multiple Choice)
4.7/5
(26)
Correct Answer:
Verified

B

Residential air conditioning systems have a superheat range of __________ degrees under normal operating conditions.

(Multiple Choice)
4.9/5
(42)

Which type of bearings do most residential fan motors use?

(Multiple Choice)
4.8/5
(36)

Most modern residential blower motors are of which type?

(Multiple Choice)
4.9/5
(36)

Which type of leak detection involves burning refrigerant?

(Multiple Choice)
4.8/5
(39)

List three key indicators that pulleys are not aligned properly on blowers.

(Essay)
4.8/5
(43)

Which type of leak detection uses a refrigerant additive charged into the refrigeration system?

(Multiple Choice)
4.7/5
(32)

If, while troubleshooting an R-22 residential air conditioning system at near design conditions, the operating pressures are found to be 80 psig on the low side and 200 psig on the high side, it is most likely that the system is opperating

(Multiple Choice)
4.9/5
(31)

If, while troubleshooting a residential central air conditioning system, the technician notices frost on the suction line, what is the most likely problem?

(Multiple Choice)
4.8/5
(45)

Which is NOT a cause of high superheat in an air conditioning system?

(Multiple Choice)
4.9/5
(37)

Which is NOT a cause for low superheat in an air conditioning system?

(Multiple Choice)
4.9/5
(41)

Which of the following could be the cause for excessive subcooling in an air conditioning system?

(Multiple Choice)
4.8/5
(40)

To use the electronic leak detector, the system must contain at least some refrigerant. If the system is operating with a small leak, plenty of pressurized refrigerant is left in the system. But if the system is void of refrigerant, it must first be pressurized with __________, to which a trace of refrigerant has been added.

(Multiple Choice)
4.9/5
(41)

List three common ways by which air can find its way into an air conditioning system.

(Essay)
4.9/5
(36)

Halide leak detectors will work only with __________ refrigerants.

(Short Answer)
4.9/5
(36)

Newer, high efficiency air conditioning systems operate with __________ condenser saturation temperatures and pressures than older, standard efficiency systems.

(Multiple Choice)
4.8/5
(37)

Which of the following is a condition of an air conditioning system that is overcharged?

(Multiple Choice)
4.9/5
(41)

Arrange the following troubleshooting steps in the correct order. _____ test the system operation _____ gather information _____ verify the complaint _____ complete the service call _____ perform a visual inspection _____ isolate the problem _____ correct the problem

(Essay)
4.9/5
(41)
Showing 1 - 20 of 26
close modal

Filters

  • Essay(0)
  • Multiple Choice(0)
  • Short Answer(0)
  • True False(0)
  • Matching(0)