Chapter 11

Question 1

The draft gauge should only be stored in a vehicle so that it is readily available when needed

Answer 1

False

Question 2

What are three temperature reference points for checking temperature measuring instruments

Answer 2

32°F (ice & water)
98.6°F (body temp)
212°F (boiling point)

Question 3

The outer extremities, such as hands, are not a body temperature

Answer 3

True

Question 4

What is the def of calibration

Answer 4

Changing the instruments output/reading to correspond with the standard/correct reading

Question 5

Why are most glass thermometers not able to be calibrated

Answer 5

Because the graduations are etched on the stem

Question 6

Is accuracy more important in high or low temps

Answer 6

Lower temps

Question 7

The electric resistance of a heater will be ____ when they get hot

Answer 7

Greater

Question 8

How often should combustion analyzers be calibrated?

Answer 8

Annually, wet kit doesn’t need to be calibrated

Question 9

The potassium hydroxide in the wet kit should be changed after roughly how many tests.

Answer 9

After 200 tests

Question 10

How often should a volt meter be checked against a high quality bench meter?

Answer 10

At least once a year or whenever you suspect the readings are off.

Question 11

If the temperatures sensing instrument is to be used more than a 1000 feet above sea level, use a ____ thermometer as a standard instead of the boiling water temperature.

Answer 11

laboratory glass

Question 12

What is a good investment for use in calibrating electronic thermometers?

Answer 12

Laboratory grade glass thermometer.

Question 13

It is impossible to determine a correct gauge reading if the gauge is not set at ____ at the start of the test.

Answer 13

0

Question 14

Ice made from what type of water is preferred for performing a low temperature check.

Answer 14

Purified or distilled water

Question 15

T/F
The thermometer indicates the temperature of the sensing element, not the temperature of the object or liquid

Answer 15

True

Question 16

What should be done to the gauge manifold and hoses prior to performing a pressure test.

Answer 16

Purge the gauge manifold and hoses of air

Question 17

What prevents the needle on the high side manifold gauge from backing up too far when checking a micron gauge.

Answer 17

Little peg

Question 18

If a meter is out of calibration, what is the first thing that should be checked?

Answer 18

Check the batteries and change if necessary.

Question 19

The boiling point of water is suitable for checking the thermometer in the flue gas kit even though it is near the bottom of the scale. (True or false)

Answer 19

True

Question 20

To improve the pumping capacity of a vacuum pump, what should be done?

Answer 20

Change the oil

Question 21

A small gauge is more accurate for monitoring systems that operate in a vacuum because the needle doesn’t have to travel far between 0 psig and 30 in. Hg. (True or False)

Answer 21

False

Question 22

How can you improve the accuracy of the temperature sensing element?

Answer 22

Temp leads wrapping the temp sensing element will insulate it from the surrounding air, giving more accurate reading.

Question 23

In order to check both manifold gages at the same time, which hose is connected to the refrigerant cylinder?

Answer 23

Center hose