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Homework * ASC111 * Group 4

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 

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

 2. 

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

 3. 

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

 4. 

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

 5. 

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

 6. 

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

 7. 

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

 8. 

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 proper air balance
d.
measures the quantity of air, in cfm, flowing through a duct
 

 9. 

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

True/False
Indicate whether the statement is true or false.
 

 1. 

Variable speed reversible electric drills can be used to drill holes as well as tighten and loosen screws
 

 2. 

The odd shape of the Torx type screw driver is the square shaft used to tighten or loosen set screws.
 

 3. 

A programmable charging scale measures the volume of refrigerant flow into a refrigeration system.
 

 4. 

An instrument called a clamp-on ammeter is so called because the tongs can be clamped around a single wire.
 

 5. 

A clamp-on ammeter is designed to measure only alternating current.
 

Completion
Complete each statement.
 

 1. 

When required to drill holes on a roof that has no power supply, the best drill for the job would be a(n) ______________________________.
 

 

 2. 

The tool used to create pipe threads on the outside of a pipe is called a(n) ____________________.
 

 

 3. 

The tool used to create internal threads is called a(n) ____________________.
 

 

 4. 

Mercury bulb-controlled thermostats require that they are installed perfectly horizontal. The tool used to accomplish this is called a(n) ____________________.
 

 

 5. 

After brazing a joint in a very tight location, the technician would use a(n) _________________________ to determine if the joint is properly brazed.
 

 

 6. 

Evacuating a system is accomplished with a(n) _________________________ and helps to remove air and non-condensable gases from a system.
 

 

 7. 

A vacuum pump removes _________________________ and air from a refrigeration system.
 

 

 8. 

A(n) ______________________________ is used to measure the percentage of CO in flue products.
 

 

 9. 

A(n) _________________________ is used to measure the amount of CO2 in flue products.
 

 

 10. 

A(n) ____________________ is used to measure the amount of O2 in flue products.
 

 

 11. 

The dial-type meter used to measure the pressure in a heating unit flue pipe is called a(n) ____________________.
 

 

 12. 

An instrument that can be used to determine the relative humidity of air is the ____________________.
 

 

Short Answer
 

 1. 

For what is a soldering gun usually used?
 

 2. 

What is the major advantage of a clamp-on ammeter?
 

 3. 

What does a VOM meter measure?
 

Matching
 
 
Match the cutting tool to the material on which it would best be used.
a.
soft-drawn copper tubing
b.
copper wire
c.
PVC pipe
d.
plasterboard / fiberboard
e.
metal stock
 

 1. 

hacksaw
 

 2. 

tubing cutter
 

 3. 

utility knife
 

 4. 

stripper and crimping tool plastic
 

 5. 

tubing shear
 



 
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