Pre-read/Pre-test questions

Question 1

Emery cloth, which is a type of ______, is used to clean and smooth surfaces

Answer 1

Abrasive

Question 2

When cutting holes for air registers and vents, it is best to use a ____.

Answer 2

reciprocating saw

Question 3

When installing parts that must be straight, plumb, or perfectly horizontal, use a ____.

Answer 3

level

Question 4

A twist drill bit has ____ to remove chips from the hole as it is being drilled.

Answer 4

flutes

Question 5

A ____ wrench is used to measure and regulate the amount of tightness applied to a fastener.

Answer 5

torque

Question 6

Which of the following grades of emery cloth is the finest grade?

A) 1/2
B) 1
C) 00
D) 0000

Answer 6

0000

Question 7

A \_\_\_\_ punch is used to drive out keys and to line up holes in mating parts.
A) prick
B) pin
C) drift
D) center

Answer 7

drift

Question 8

When dipped in a bath of ice and water, a thermometer should read within 1°F of \_\_\_\_.
A) 0°F
B) 20°F
C) 32°F
D) 212°F

Answer 8

32 degrees F

Question 9

A \_\_\_\_ punch is used to mark the location of a hole that needs to be drilled.
A) center
B) drift
C) pin
D) prick

Answer 9

center

Question 10

A manometer is typically used to measure pressure values that are hundreds of psi greater than atmospheric pressure.

Answer 10

False

Question 11

A multimeter can measure the voltage, resistance, and current of a circuit.

Answer 11

True

Question 12

Alcohol is an acceptable cleaning solvent for refrigeration system components.

Answer 12

True

Question 13

In the whole number system for identifying drill bit sizes, a No. 50 drill bit has a larger diameter than a No. 20 drill bit.

Answer 13

False

Question 14

Describe a box-end wrench

Answer 14

Enclosed grips on each side to safely grip the nut or bolt

Question 15

Describe an open-end wrench

Answer 15

Open grips on each side with a different size head

Question 16

Describe a combonation wrench

Answer 16

Has the same size open end head and box end head on each side

Question 17

Adjustable wrenches are for _______ torque only

Answer 17

medium

Question 18

Describe a flare nut wrench

Answer 18

Similar to an open end wrench only with a smaller opening in the gripping head. Used for flare nuts with SAE fittings.

Question 19

How many points do hex keys (Allen keys) have?

Answer 19

six

Question 20

What end of a service valve wrench must be used for cracking service valves?

Answer 20

The fixed (locked) end.

Question 21

Why is a torque wrench important?

Answer 21

To provide proper amount of tightness and avoid warping or damaging parts.

Question 22

Two common types of hammers used by HVACR Technicians?

Answer 22

Ball peen and Standard straight claw hammer

Question 23

What should be used when putting tube in a vice?

Answer 23

Brass jaw caps

Question 24

What is a shank?

Answer 24

Part of the bit that clamps onto the chuck

Question 25

A tap drill should be slightly _____ than the inside diameter of the threads for which the hole is being drilled

Answer 25

larger

Question 26

A pin punch is used for

Answer 26

driving pins in or out

Question 27

Prick punch (Scratch Awl) is used for

Answer 27

layout work

Question 28

A hacksaw blade should not be stroked faster than

Answer 28

60 strokes per minute

Question 29

Hacksaw blades are _______

Answer 29

directional

Question 30

Use a ______ drill to make holes in masonry

Answer 30

hammer

Question 31

How would you check a thermometers accuracy?

Answer 31

ice water bath

Question 32

A manometer with a pitot tube is used for measuring ______ in ductwork

Answer 32

velocity

Question 33

A manometer is a type of pressure gauge that measures values around atmospheric pressure.

Answer 33

True

Question 34

What are gaskets for?

Answer 34

To make a leak-proof joint

Question 35

Keep files clean by using a ______

Answer 35

file card

Question 36

trade name of a regular adjustable wrench?

Answer 36

crescent or craftsmen wrench

Question 37

Another name for a close-quarter tube cutter?

Answer 37

Imp cutter

Question 38

Tube cutters can cut _______ and ________ tubing

Answer 38

copper and aluminum

Question 39

Most important part of using a tube cutter is to make sure:

Answer 39

Make sure you tighten the cutting wheel 1/4 at a time ensuring a full turn.

Question 40

What is an inner/outer reamer used for?

Answer 40

removing burrs from the inside and outside of tubing

Question 41

Swaging tools are used to join two pipes of the same size together

Answer 41

True

Question 42

Tube benders are available in ________ , ________ and the _______ type

Answer 42

spring, lever, gear

Question 43

What are tube brushes used for?

Answer 43

To remove oxidization from copper tubing, pipe, and fittings in preparation for soldering or brazing

Question 44

Pinch off tool (vice-grips, locking pliers) is used to

Answer 44

seal off copper tubing

Question 45

What is a vacuum pump for?

Answer 45

for servicing air conditioning and refrigeration systems by removing air and non-condensable gases from the system.

Question 46

What is a fin straightener for?

Answer 46

straightening condenser and evaporator coil fins 8,9,10,12,14 and 15 fins per inch

Question 47

Why are heat guns needed?

Answer 47

To warm refrigerant and melt ice

Question 48

What is a soldering gun primarily used for?

Answer 48

To solder electrical connections

Question 49

A flaring tool is used to

Answer 49

put a flare on the end of copper tubing

Question 50

What is a sling psychrometer used for?

Answer 50

to obtain relative humidity readings quickly using the wet-bulb/dry-bulb principle

Question 51

two types of refrigerant leak detectors are?

Answer 51

- electronic leak detector - high-intensity ultraviolet lamp leak detector - ultrasound leak detector

Question 52

list the components usually associated with a gauge manifold unit?

Answer 52

- compound gauge (low pressure and vacuum) - high pressure gauge - manifold - valves - hoses

Question 53

list three types of thermometers

Answer 53

glass stem, digital, dial indicator

Question 54

What is the purpose of a draft gauge?

Answer 54

check the pressure of the flue gas in gas and oil furnaces to ensure that the flue gases are moving up the flue at a satisfactory speed

Question 55

When are air velocity measurement instruments used?

Answer 55

for balancing duct systems, checking fan and blower characteristics, and making static pressure measurements

Question 56

List and describe three methods of securing an object to a wall made of gypsum board

Answer 56

1. Wall anchors 2. Toggle bolts 3. Plastic toggle drywall anchors

Question 57

hollow rivets are assembled in a pin that is often called:

Answer 57

a mandrel