UNITS 1-8

Question 1

Convert 150°F to Celsius

Answer 1

65.56°C

Question 2

0°C converted into Fahrenheit

Answer 2

32°F

Question 3

-30°C converted into Fahrenheit

Answer 3

-22°F

Question 4

350°C converted into Fahrenheit

Answer 4

662°F

Question 5

-400°F converted into Celsius

Answer 5

-240°C

Question 6

Which temperature is the hottest?
a. 600R
B. -20C
C. 150F
D. 380k

Answer 6

D. 380K

Question 7

True or false
Latent heat is also known as hidden heat because it can’t be measured .

Answer 7

True

Question 8

True or false
The Uninsulated portion of the suction line should be warm and dry.

Answer 8

False it should be cold and sweaty

Question 9

True or false
Specific heat is the amount of heat necessary to raise the temperature of 1 pound of water, 1°F .

Answer 9

False
1 pound of any substance

Question 10

True or false
As you gain elevation/altitude, atmospheric pressure decreases

Answer 10

True

Question 11

A compound pressure gauge reads pressures above and below atmospheric pressure

Answer 11

True

Question 12

System superheat is measured by placing a thermal couple on the suction line right before it enters the compressor

Answer 12

True

Question 13

The instrument that measures atmospheric pressure is called the Bourdon Tube

Answer 13

False

Question 14

Pressure is defined as force per unit of area

Answer 14

True

Question 15

When water at 212°F boils it is only absorbing latent heat

Answer 15

True

Question 16

The two common temperature scales used by air-conditioning and refrigeration technicians are called

Answer 16

Fahrenheit, scale and Celsius scale

Question 17

Heat that changes the temperature of a substance is called

Answer 17

Sensible heat

Question 18

Convert pressure into atmospheric levels
325 psig

Answer 18

339.696 psia or 339.70 psia rounded

Question 19

235 psia= ?psig

Answer 19

220.304psig

Question 20

15 in Hg= ?psia

Answer 20

7.5psia

Question 21

6 in HG =?psia

Answer 21

12psia

Question 22

Gauge that can read pressures above and below atmospheric pressure

Answer 22

Compound gauge

Question 23

Energy traveling from one molecule to another within a substance

Answer 23

Conduction

Question 24

Instrument used to measure atmospheric pressure

Answer 24

Barometer

Question 25

Absolute scale of Fahrenheit

Answer 25

Rankine scale

Question 26

Level of heat

Answer 26

Temperature

Question 27

14.696 psi at sea level

Answer 27

Standard condition

Question 28

Gaseous state of a substance

Answer 28

Vapor

Question 29

Movement of molecules within a substance

Answer 29

Molecular motion

Question 30

Amount of energy required to change a substance into a vapor

Answer 30

Latent heat of vaporization

Question 31

As the temperature of a material increases the molecules in the material

Answer 31

Travel faster

Question 32

True or false
Silicone elastomers used in seals and gaskets are not compatible with HFO refrigerants

Answer 32

True

Question 33

What should be used to remove ice from site glasses or viewing glasses?

Answer 33

Alcohol spray

Question 34

Persons who maintain service repair or dispose of appliances, containing more than 5 pounds of refrigerant, or if the installation of such equipment requires refrigerant, charging, must be certified as type—— technician

Answer 34

Type two technician

Question 35

The superheating takes place and what basic components of the refrigeration system?

Answer 35

Condenser

Question 36

In order for a pound of 60°F water to boil how many BTUs of heat must be added to it?

Answer 36

152 BTUs

Question 37

What do the inner rings of numbers and different colors of an analog manifold gauge indicate

Answer 37

Outer ring equals pressure colors equal refrigerants numbers, equal temperature