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Shop Theory [Finalized!] > [D2L] Midterm > Flashcards

[D2L] Midterm Flashcards

1
Q

Who manages files and keep records on behalf of apprentices and employers.

A

AIT

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2
Q

Which department helps settle small issues between apprentices and their employers.

A

LAC (Local Apprenticeship Committee)

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3
Q

Which class of hazard are substances that cause skin and eye irritation, skin sensitization, dermatitis and chemical burns?

A

Chemical hazards

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4
Q

Refrigeration Mechanics will most commonly wear steel toed boots marks with the CSA Yellow Triangle

T or F

A

False (Green Triangle)

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5
Q

Which class of hazard are back injuries, repetitive strain injuries, strained muscles or fatigue?

A

Ergonomic hazards

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6
Q

What is one PPE that you will be 100% required to wear all all times as a refrigeration mechanic?

A

Safety boots

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7
Q

What is the definition of an employer?

A

a person who is self-employed in an occupation

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8
Q

Is your employer allowed to enforce stricter safety rules on their jobsite than OHS requires?

A

Yes

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9
Q

What is the safe recommended lifting angle for sling legs?

1) 30
2) 45
3) 60
4) Any angle between 30 and 60

A

60

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10
Q

What is the safety rigging factor for lifting workers?

A

10:1

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11
Q

Is the 10’ ladder in our class considered a step ladder?

A

Yes

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12
Q

At which point must a wire rope be replaced?

When surfaces are worn by 1/2 or more of their original diameter
When surfaces are worn by 1/3 or more of their original diameter
When the core is visible
When one strand is broken

A

When one strand is broken

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13
Q

A 24’ extension ladder used on a 20 foot tall building should be placed how far away from the base of the building?

3.33 feet
4 feet
5 feet
6 feet

A

5 feet

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14
Q

What color is for ordinary combustibles fire extinguisher?

A

Green triangle

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15
Q

What are the four steps of proper portable fire extinguisher use?

A

PASS

Pull the pin
Aim the extinguisher
Squeeze the handle
Sweep the extinguisher from side to side.

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16
Q

Who is responsible for providing workers with WHIMIS training?

The employee must obtain their own training
The union must provide the training
The employer must provide the training
The training institute must provide the training

A

The employer must provide the training

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17
Q

What is a compound gauge?

A

Allows reading of positive pressure and vacuum pressure

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18
Q

Phillips #2 Screwdriver is good for which screw sizes?

A

5-9

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19
Q

How is an open end wrench sized?

A

Distance across the opening

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20
Q

What is the grove in tube cutters for?

A

protect the cutters wheel from burrs

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21
Q

It is ok to use nitrogen without waiting, after it has been on its side

T or F

A

True

22
Q

which filler material requires the lowest temp?

A

Soft Solder

23
Q

Which requires no flux?

A

Silver Soldering

24
Q

Which material is better for connecting dissimilar metals in a refrigeration system?

A

Silver Alloy

25
Q

What should be done to the acetylene regulator when you are done brazing?

dial it all the way out
dial it all the way in
remove from the B tank
A and C
B and C

A

A and C

dial it all the way out
remove from the B tank

26
Q

The formula for calculating the Fitting Allowance is

A

FA = Throw - Thread Engagement

27
Q

How is Black Steel / Gas pipe is measured?

A

Nominal inside diameter

28
Q

Where is iron pipe typically used?

A

Ammonia systems

29
Q

What is brass made of?

A

Copper and Zinc

30
Q

What color is type K copper pipe?

A

Green

31
Q

What is a hygrometer used to measure?

A

moisture content

32
Q

What is the purpose for the yellow hose used with a refrigeration gauge manifold set?

A

it is used for charging and evacuation refrigeration systems

33
Q

What is the main disadvantage of copper?

A

high coefficient of expansion

34
Q

Which type of copper pipe is annealed?

A

Soft drawn

35
Q

How many threads should be left without Teflon tape when adding tape to threads?

A

all threads should be covered

36
Q

What should be done to help ensure a good flare?

add oil to the pipe
stop before the tool bottoms out
add oil to the cone of the flaring tool

A

add oil to the cone of the flaring tool

37
Q

When crimping wires to spade connectors in class do we use the “non” or “ins” section?

A

ins

38
Q

Why should you avoid pulling on the wires and spade after crimping?

it may pull out the wire
it can break individual strands or the wire
the wire insulation can partially slide back
always pull the wires to test it

A

it can break individual strands or the wire

39
Q

When making a cord which screw does the black wire go to?

A

Green

40
Q

Which fitting has a hub at both ends?

A

Reducing coupling

41
Q

What happens if you use too much flux?

A

it can cause corrosion

42
Q

Acetylene Hoses are which colour?

A

Red

43
Q

Cutting fluid for gas pipe threading is used for

A

keeping the tool cool

44
Q

wearing gloves is an example of

engineering controls
administrative controls
PPE use

A

PPE use

45
Q

According to OHS you must wear fall protection above

A

3m (10ft)

46
Q

the piece you turn on a micrometer to prevent overtightening is the

Thimble
Anvil
Dial
Ratchet

A

Rachet

47
Q

What type of copper can not be used as refrigeration copper?

A

Type M (plumbing)

47
Q

What does ACR mean if it is stamped on copper pipe?

A

Air Conditioning and Refrigeration

48
Q

You measure a piece of copper to bend, make a mark at 4” and put it in the mechanical benders. The end you measured from sticks out the right side. What point should line up with the Zero on the wheel?

A

90 or R??? (not sure)

49
Q

What is another name for a vacuum gauge?

A

Micron gauge

50
Q

Why did we pull down the system to 500 microns then turn off the vacuum pump and watch the microns on the gauge for a minute before adding to the system?

To tell if we pulled it into a deep enough vacuum
To prove the system doesn’t have a large leak
To test the vacuum pump check valve
To allow the deep vacuum to settle out

A

To prove the system doesn’t have a large leak

51
Q

Before we remove gauges from a service valve we put it in which position?

Back seat
Front seat
Mid seat
Gauge seat

A

Back seat

Shop Theory [Finalized!] (23 decks)

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