Exam 11: Calibrating Instruments

A device commonly used for detecting refrigerant leaks is a(n) ____.

____________________ thermometers are simple, economical, and accurate.

What thermometer has replaced the glass-stem thermometer?

Why should the thermometer element not touch the bottom of the pan when checking it in boiling water?

Any instrument with a digital readout will have ____________________.

It is important to note that Ohm's law, as written, will hold for AC-powered circuits that are used to operate resistive-type loads .

____________________ points for all instruments should be established to give the technician confidence.

How can the ohmmeter feature of a VOM meter be checked?

____________________ instruments register pressures above and below atmospheric pressure.

Water boils at 220°F at sea level under standard atmospheric conditions .

Refrigeration technicians must have thermometers that are accurate from 40°F to 150°F to measure the refrigerant lines and the inside of coolers.

If the ammeter is off by more than _____%, it should be sent to the repair shop.

Three reference points for checking temperature measuring instruments are ____.

How can a technician determine if a temperature sensing lead of his digital thermometer is working correctly?