unit 5 quiz Flashcards
the tool used to create pipe threads on the outside of a pipe is called a ___
die or pipe threader
a ___ is used to measure the amount of CO2 in flue products
carbon dioxide meter
after brazing a joint in a very tight location, the technician would use a ___ to determine if the joint is properly brazed
inspection mirror
the dial-type meter used to measure the pressure in a heating unit flue pipe is called a ___
draft gauge
when required to drill holes on a roof that has no power supply, the best drill for the job would be a ___
electric drill
a ___ is used to measure the amount of O2 in flue products
oxygen meter
a vacuum pump removes ___ and air from a refrigeration system
non-condensables
the tool used to create internal threads is called a ___
tap / pipe threader
a ___ is used to measure the percentage of CO in flue products
carbon monoxide meter
evacuating a system is accomplished with a ___ and helps to remove air and non-condensable gases from a system
vacuum pump
an instrument that can be used to determine the relative humidity of air is the ___
sling psychrometer
mercury bulb controlled thermostats require that they are installed perfectly horizontal. the tool used to accomplish this is called a ___
level
what does a VOM meter measure
Volts, Ohms, Milliamps
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
c. tighten or loosen nuts on copper tubing
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
c. cut and strip wire
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
d. all of the above
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
a. measures the dry bulb and wet bulb temperatures of air
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
c. hex key
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
a. cut copper tubing
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
d. all of the above
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
d. detects refrigerant leaks in a refrigeration system
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
a. open and close refrigerant service valves
t/f the odd shape of the torx type screw driver is the square shaft used to tighten or loosen set screws
false
t/f variable speed reversible electric drills can be used to drill holes as well as tighten and loosen screws
true
