Exam 41: Troubleshooting

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

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

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

Reducing the CFM through the evaporator will cause the head pressure to ____________________.

With a rise in outdoor temperature, the head pressure will rise.

Why is the head pressure raised to 278 psig to check the subcooling of the system?

What is the process that normally begins the electrical troubleshooting of the system?

If a technician finds the circuit protection for an air-conditioning component has been tripped, what should the technician do?

Two types of fixed-bore metering devices are capillary tubes and _________________________.

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

Why do we measure temperatures at the evaporator rather than the suction pressure?

Temperature difference is used to describe the difference in the inlet and _________ temperature of a heat exchanger.

If a compressor has a partially shorted winding, it could run for a while, overheat, and shut off.

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

Where is the correct location for a sight glass in order to check the charge?

A service valve can be used to ____.

When is it necessary to connect gauges onto a system?

Why should a technician visually inspect the equipment before installing gauges?

On most gauge manifolds, the suction or low side gauge is located on the ____________________.