Question 1

To check the temperature leads of an electronic thermometer for high temperature, they should be ____.

Accepted Answer

A)  placed on the bottom of a pan of boiling water 
B)  suspended in a pan of boiling water 
C)  suspended in the vapor above a pan of boiling water 
D)  suspended in a pan of boiling water located at least 1,000 ft. above sea level 
A)  placed on the bottom of a pan of boiling water 
B)  suspended in a pan of boiling water 
C)  suspended in the vapor above a pan of boiling water 
D)  suspended in a pan of boiling water located at least 1,000 ft. above sea level B

Question 2

The ____ is used most frequently for amperage checks.

Accepted Answer

A)  hot-wire ammeter 
B)  integrated ammeter 
C)  clamp-on ammeter 
D)  alternating ammeter 
A)  hot-wire ammeter 
B)  integrated ammeter 
C)  clamp-on ammeter 
D)  alternating ammeter C

Question 3

Why is it necessary to check the calibration of a gauge manifold periodically?

Accepted Answer

The technician must be able to rely on the gauge manifold and have some reference points with which to check them periodically. This is particularly important when there is reason to doubt gauge accuracy. The gauge manifold is used frequently and is subject to considerable abuse .

Question 4

The accuracy of a thermometer is more important when working on high temperature refrigeration (air conditioning) systems.

Accepted Answer

A) True 
 B)False

Question 5

Special thermometers are used to measure temperatures above ____________________ ºF .

Accepted Answer

The answer of Special thermometers are used to measure temperatures...

Question 6

____ can detect leak rates of about 1/4 oz per year.

Accepted Answer

A)  Halide torches 
B)  Compressed air canisters 
C)  Electronic leak detectors 
D)  Mechanical leak detectors 
A)  Halide torches 
B)  Compressed air canisters 
C)  Electronic leak detectors 
D)  Mechanical leak detectors

Question 7

To check the temperature leads of an electronic thermometer for low temperature, they should be stirred in a container of ____.

Accepted Answer

A)  crushed ice and water with 1/2 teaspoon of salt added 
B)  crushed ice and water with 1/2 teaspoon of sugar added 
C)  crushed ice and pure water 
D)  cube ice and pure water 
A)  crushed ice and water with 1/2 teaspoon of salt added 
B)  crushed ice and water with 1/2 teaspoon of sugar added 
C)  crushed ice and pure water 
D)  cube ice and pure water

Question 8

When is it important to purchase a good quality instrument?

Accepted Answer

When electrical testing proced

Question 9

Heating and air-conditioning technicians must measure air temperatures from 40ºF to ____________________ºF.

Accepted Answer

150,one hu

Question 10

____________________ means the changing of the instrument's output or reading to correspond to a standard or correct reading.

Accepted Answer

The answer of ____________________ means the changing of the instrument's...

Question 11

How can you check the clamp-on ammeter?

Accepted Answer

Like the voltmeter,

Question 12

How is the milliamp scale on a meter checked?

Accepted Answer

The milliamp scale on the mete

Question 13

The three easily accessible reference points for ____________________-measuring instruments are ice, body temperature, boiling water.

Accepted Answer

The answer of The three easily accessible reference points for...

Question 14

What is the easiest way to check the voltage scale of a VOM meter?

Accepted Answer

Compare yo

Question 15

Some instruments cannot be calibrated.

Accepted Answer

A) True 
 B)False

Question 16

Stirring the ice and water with the thermometer will increase the accuracy of the thermometer reading.

Accepted Answer

A) True 
 B)False

Question 17

____________________ instruments measure the temperature of vapors, liquids, and solids.

Accepted Answer

Temperatur

Question 18

Flue-gas analysis instruments analyze products of combustion from fossil-fuel-burning equipment, such as oil and gas furnaces and ____.

Accepted Answer

A)  boilers 
B)  CO2 testers 
C)  cooling towers 
D)  refrigerators 
A)  boilers 
B)  CO2 testers 
C)  cooling towers 
D)  refrigerators

Question 19

Ohm's law is represented with the formula: ____.

Accepted Answer

A)  I = R/E 
B)  I = E/R 
C)  E = R/I 
D)  R = I/E 
A)  I = R/E 
B)  I = E/R 
C)  E = R/I 
D)  R = I/E

Question 20

You should not spray pure refrigerant into the sensing element of a leak detector.

Accepted Answer

A) True 
 B)False

Exam 11: Calibrating Instruments

To check the temperature leads of an electronic thermometer for high temperature, they should be ____.

The ____ is used most frequently for amperage checks.

Why is it necessary to check the calibration of a gauge manifold periodically?

The accuracy of a thermometer is more important when working on high temperature refrigeration (air conditioning) systems.

Special thermometers are used to measure temperatures above ____________________ ºF .

____ can detect leak rates of about 1/4 oz per year.

To check the temperature leads of an electronic thermometer for low temperature, they should be stirred in a container of ____.

When is it important to purchase a good quality instrument?

Heating and air-conditioning technicians must measure air temperatures from 40ºF to ____________________ºF.

____________________ means the changing of the instrument's output or reading to correspond to a standard or correct reading.

How can you check the clamp-on ammeter?

How is the milliamp scale on a meter checked?

The three easily accessible reference points for ____________________-measuring instruments are ice, body temperature, boiling water.

What is the easiest way to check the voltage scale of a VOM meter?

Some instruments cannot be calibrated.

Stirring the ice and water with the thermometer will increase the accuracy of the thermometer reading.

____________________ instruments measure the temperature of vapors, liquids, and solids.

Flue-gas analysis instruments analyze products of combustion from fossil-fuel-burning equipment, such as oil and gas furnaces and ____.

Ohm's law is represented with the formula: ____.

You should not spray pure refrigerant into the sensing element of a leak detector.

Heat and Pressure

Matter and Energy

Refrigeration and Refrigerants

General Safety Practices

Tools and Equipment

Fasteners

Tubing and Piping

Leak Detection, System Evacuation and System Clean-Up

Refrigerant and Oil Chemistry and Managementrecovery, Recycling, Reclaiming, and Retrofitting

System Charging

Basic Electricity and Magnetism

Introduction to Automatic Controls

Automatic Control Components and Applications

Troubleshooting Basic Controls

Advanced Automatic Controlsdirect Digital Controls Ddc and Pneumatics

Types of Electric Motors

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Troubleshooting Electric Motors

Evaporators and the Refrigeration System

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Special Refrigeration System Components

Application of Refrigeration Systems

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Troubleshooting and Typical Operating Conditions for Commercial Refrigeration

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Comfort and Psychrometrics

Refrigeration Applied to Air Conditioning

Air Distribution and Balance

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Residential Energy Auditing

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Heat Gain and Heat Loss in Buildings

Air Source Heat Pumps

Geothermal Heat Pumps

Domestic Refrigerators and Freezers

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