unit 5 quiz

Question 1

the tool used to create pipe threads on the outside of a pipe is called a ___

Answer 1

die or pipe threader

Question 2

a ___ is used to measure the amount of CO2 in flue products

Answer 2

carbon dioxide meter

Question 3

after brazing a joint in a very tight location, the technician would use a ___ to determine if the joint is properly brazed

Answer 3

inspection mirror

Question 4

the dial-type meter used to measure the pressure in a heating unit flue pipe is called a ___

Answer 4

draft gauge

Question 5

when required to drill holes on a roof that has no power supply, the best drill for the job would be a ___

Answer 5

electric drill

Question 6

a ___ is used to measure the amount of O2 in flue products

Answer 6

oxygen meter

Question 7

a vacuum pump removes ___ and air from a refrigeration system

Answer 7

non-condensables

Question 8

the tool used to create internal threads is called a ___

Answer 8

tap / pipe threader

Question 9

a ___ is used to measure the percentage of CO in flue products

Answer 9

carbon monoxide meter

Question 10

evacuating a system is accomplished with a ___ and helps to remove air and non-condensable gases from a system

Answer 10

vacuum pump

Question 11

an instrument that can be used to determine the relative humidity of air is the ___

Answer 11

sling psychrometer

Question 12

mercury bulb controlled thermostats require that they are installed perfectly horizontal. the tool used to accomplish this is called a ___

Answer 12

level

Question 13

what does a VOM meter measure

Answer 13

Volts, Ohms, Milliamps

Question 14

flare nut wrenches are used to
a. tighten nuts that cannot be reached with other wrenches
b. remove hex head screws from refrigerator cabinets
c. tighten or loosen nuts on copper tubing
d. open or close refrigerant service valves

Answer 14

c. tighten or loosen nuts on copper tubing

Question 15

a wiring and crimping tool is used to
a. staple low voltage wire
b. crimp tubing
c. cut and strip wire
d. fasten insulation to duct

Answer 15

c. cut and strip wire

Question 16

a socket set is an integral part of a technicians tool box because
a. the ratchet handle can loosen and tighten a nut or hex head bolt with minimal movement
b. there are multiple sockets that can be interchanged easily to accommodate many different size nuts and bolts
c. the extension allows easier access to nuts/bolts in tight locations
d. all of the above

Answer 16

d. all of the above

Question 17

a sling psychrometer
a. measures the dry bulb and wet bulb temperatures of air
b. measures the air velocity through a duct
c. uses a microprocessor to provide information for a proper air balance
d. measures the quantity of air, in cfm, flowing through a duct

Answer 17

a. measures the dry bulb and wet bulb temperatures of air

Question 18

which of the following tools is different from the rest with respect to the shape of the nut or screw that it turns
a. adjustable wrench
b. combination wrench
c. hex key
d. open end wrench

Answer 18

c. hex key

Question 19

tube cutters are used to
a. cut copper tubing
b. cut sheet metal duct
c. cut iron pipe used for natural gas or liquefied petroleum gas
d. cut insulation for tubing

Answer 19

a. cut copper tubing

Question 20

a gauge and manifold assembly used in refrigeration work may include
a. a four way valve design using a shutoff valve for each hose
b. compound gauge, standard gauge, manifold, valves and hoses
c. either two or four valves
d. all of the above

Answer 20

d. all of the above

Question 21

the halide leak detector
a. detects air leaks in duct systems
b. detects nitrogen leaks in the refrigeration system
c. is used to detect water leaks in a chilled water system
d. detects refrigerant leaks in a refrigeration system

Answer 21

d. detects refrigerant leaks in a refrigeration system

Question 22

air conditioning and refrigeration reversible ratchet wrenches are used to
a. open and close refrigerant service valves
b. tighten hex head sheet metal screws
c. tighten nuts that cannot be reached with other wrenches
d. tighten flare nuts

Answer 22

a. open and close refrigerant service valves

Question 23

t/f the odd shape of the torx type screw driver is the square shaft used to tighten or loosen set screws

Answer 23

false

Question 24

t/f variable speed reversible electric drills can be used to drill holes as well as tighten and loosen screws

Answer 24

true

Question 25

t/f a programmable charging scale measures the volume of refrigerant flow into a refrigeration system

Answer 25

false

Question 26

t/f an instrument called a clamp on ammeter is so called because the tongs can be clamped around a single wire

Answer 26

true

Question 27

t/f a clamp on ammeter is designed to measure only alternation current

Answer 27

false