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Refridgeration 101 Midterm > 101k > Flashcards

101k Flashcards

1
Q

What does the groove at the bottom of tube cutters allow you to do

A

Cut off/ removal of a flare

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2
Q

When flaring always use

A

Oil so it doesn’t crack

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3
Q

Flares are at what degree

A

45°

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4
Q

3 types of benders

A

Spring benders, mechanical benders, power benders

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5
Q

Is acetylene highly flammable

A

Yea

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6
Q

Regulators reduce pressure in acetylene bottles to the hose from

A

250 psi to 15 psi

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7
Q

When storing bottles always make sure pressures are at

A

0

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8
Q

Common name for Acetylene tank

A

B tank

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9
Q

What wrench do you use to open the valve on an acetylene bottle

A

Valve wrench

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10
Q

What are the hose colors for acetylene and oxygen

A

Red - acetylene
Green - oxygen

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11
Q

Cutting fluid is used for

A

-Keeping the tool cool while cutting
-Keeping the material cool
-reduce wear on tool and material you’re cutting
-provides a good finish on cut

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12
Q

Two types of copper

A

Hard drawn and soft drawn

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13
Q

Cooper pipe is usually what two lengths

A

12ft and 20ft

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14
Q

What is coppers main disadvantage

A

It has a high coefficient of expansion

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15
Q

Copper tube used for refrigeration called

A

ACR

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16
Q

Two types of wall thicknesses

A

L and K

17
Q

Type K has what paint

A

Green

18
Q

Type L has what paint

A

Blue

19
Q

Can you bend type M copper tubing

A

No and not for refrigerant lines

20
Q

Keep copper away from overhead power lines (true or false)

A

True

21
Q

FPT means

A

Female pipe thread

22
Q

MPT means

A

Male Pipe Thread

23
Q

90° ELL fitting

A

Both sides are same length

24
Q

90° street ELL fitting

A

Both sides are different sizes

25
Q

Iron pipe is also called

A

Black pipe

26
Q

Iron pipe is used with

A

Ammonia

27
Q

Two standard types of iron pipe

A

Schedule #40, Strong Schedule #80

28
Q

When assembling pipe onto a frame you consider the threading and its length, what is this process called

A

Thread engagement

29
Q

Silver braising uses temperatures above

A

800°F

30
Q

Soft soldering uses temperatures of under

A

800°F

31
Q

95/5 solder is

A

95% Tin
5% Antimony

32
Q

95/5 is used on

A

Copper to steel
Copper to brass
Copper to copper

33
Q

Space between the tube and the fitting is called

A

Capillary gap

34
Q

How to fill capillary gap

A

Use capillary action to fill

35
Q

When using flux you use a

A

Brush

36
Q

When you cool a joint after heating it, what are you doing?

A

Breaking down the metal by shocking it with stress

37
Q

Brazing uses filler metals that melt at temperatures of

A

1100°F to 1500°F

38
Q

Throw of fitting - thread engagement =

A

Fitting allowance

Refridgeration 101 Midterm (6 decks)

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