[D2L] Final Review

Question 1

What filler material would you use to connect Copper to Steel

Answer 1

Silver Alloy Wire (Silver brazing)

Question 2

What is 95/5 when it comes to soldering/brazing?

Answer 2

solder made of tin and antimony

Question 3

who is responsible for creating the refrigeration and air conditioning mechanic apprenticeship course outline?

The technical training provider
Alberta industry training
the provincial apprenticeship committee
the local apprenticeship committee

Answer 3

the provincial apprenticeship committee

Question 4

who administers the b52 mechanical refrigeration code?

Answer 4

absa

Question 5

what is a blueprint set

plans for all aspects of a buildings construction
a compilation of all isometric drawings in all buildings in a complex
architectural and mechanical construction drawings
all of the above

Answer 5

plans for all aspects of a buildings construction

Question 6

the key elements of WHMIS are?

worker education, safety data sheets, and container labelling
risk of fire or toxic effects and education
transportation of dangerous goods, fire hazzard, and truck placards
workers, employers and the public

Answer 6

worker education, safety data sheets, and container labelling

Question 7

which is the most versatile fire extinguisher?

Answer 7

multi-purpose dry chemical

Question 8

how would you determine the distance the footing of your extension ladder should be from the wall you are climbing?

Answer 8

ladder height divided by 4

Question 9

certain scaffolds do not require handrails

Answer 9

False

Question 10

a class C involves?

Answer 10

electrical equipment

Question 11

a 20’ scissor lift can be operated by workers with no specialized training?

T or F

Answer 11

False

Question 12

what should be done if the rating tag has been ripped from a lifting sling?

Answer 12

sling should be destroyed

Question 13

what type of fastener is most commonly used in commercial HVAC equipment?

1/4” hex head self tapping tech screw
m10 Phillips self tapping screw
m8 torx screw
5/16” hex head self tapping tech screw

Answer 13

5/16” hex head self tapping tech screw

Question 14

in metallurgy(금속공학), the term annealed means

Answer 14

a substance exposed to extreme heat and allowed to cool slowly in a controlled environment producing a soft workable product

Question 15

how would a technician determine the grade of bolt that needs to be replaced?

Answer 15

the number of markings on the head of the bolt + 2

Question 16

An installer should always utilize the strongest fasteners available in any application?

T or F

Answer 16

False

Question 17

if a threaded fastener with thread lock or locktite is difficult to remove it should be

Answer 17

heated

Question 18

brazing filler metal finds its way into the joint through

Answer 18

capilliary action

Question 19

what kind of flare is used in refrigeration systems?

45* sae
38* auto
29* standard
40* metric

Answer 19

45* sae

Question 20

the 2 grades of ACR copper are

Answer 20

L and K

Question 21

to swage is to…

Answer 21

expand an opening in tubing for an equal size tubing to fit inside

Question 22

in the interest of safety, what is the last step before a torch should be lit

Answer 22

soap test joints for leaking fuel

Question 23

acetylene must always be transported and stored

Answer 23

upright

Question 24

a regulator used for acetylene in our trade will reduce pressure from?

Answer 24

250-15psig

Question 25

an acetylene valve is to be opened with a?

Answer 25

a valve wrench

Question 26

at what temperature does copper melt?

Answer 26

1984*F

Question 27

ACR copper is always sized by outside diameter because?

Answer 27

of varying wall thicknesses of grades and necessity of low clearance connections

Question 28

the word spool is used to describe an arrangement of pipe and fittings for a given application T or F

Answer 28

True

Question 29

soldering to join copper uses filler metals that melt over 1100*F T or F

Answer 29

False Soldering to join copper typically uses filler metals that melt at temperatures below 840°F

Question 30

brazing uses filler metals that melt below 500*F T or F

Answer 30

False Brazing uses filler metals that melt above 840°F

Question 31

silver brazing (borax) flux is used with 85/15 brazing filler when

Answer 31

when joining copper to brass

Question 32

a fall protection harness should be inspected.. A) before every use B) twice annually C) whenever deemed necessary by an employers safety program D) monthly

Answer 32

A) before every use C) whenever deemed necessary by an employers safety program

Question 33

Bill c-45 (2003)places liability relating to your safety with who?

Answer 33

your direct supervisor as an appointed representative of your employer

Question 34

why is the liability implication from c-45 so important to an apprenticeship training program?

Answer 34

because a journeyperson would be considered the direct supervisor of an apprentice

Question 35

what kind of hazard controls can be implemented to mitigate hazards in the workplace? A) anecdotal controls B) administrative controls C) engineering controls D) personal protective equipment

Answer 35

B) administrative controls C) engineering controls D) personal protective equipment

Question 36

who is most responsible for your safety in the workplace?

Answer 36

you. the worker.

Question 37

the WCB is

Answer 37

a non-profit organization that compensates workers for expenses relating to lost time/income and associated medical expenses

Question 38

what are 3 steps a technician can easily take to help ensure the safety of any and all personnel at a jobsite? 1) ensure adequate lighting in the area the work is being completed 2) good housekeeping practices 3) keep access restricted to authorized personnel equipped with appropriate ppe 4) all of the above

Answer 38

all of the above

Question 39

your employer has the right to exceed safety expectations outlined in oh&s code T or F

Answer 39

True

Question 40

my employer has a legal obligation to provide me with the PPE required to perform my job safely T or F

Answer 40

False

Question 41

the employer must provide PPE when? A) the PPE will require replacement annually B) the PPE protects from dangerous noise levels C) the PPE protects from respiratory damage D) flame retardant clothing is required

Answer 41

B) the PPE protects from dangerous noise levels C) the PPE protects from respiratory damage

Question 42

your service/valve wrench is used for service valves fan bushing set screws adjusting thermostatic expansion valves all of the above

Answer 42

service valves

Question 43

a green handled Robertson screw driver is

Answer 43

#1 for 5, 6, and 7 screws

Question 44

interlocking joint pliers are also know as

Answer 44

pump pliers

Question 45

to cut copper tubing we should use a hacksaw A) with 17-24 teeth per inch B) with 9-16 teeth per inch C) with 24-32 t.p.i. D) no, we should not. E) both c and d

Answer 45

both C & D C) with 24-32 t.p.i. D) no, we should not.

Question 46

when are micrometers and calipers used?

Answer 46

when measurements must be accurate to within .001"

Question 47

what limits the accuracy of an i.r. thermometer?

Answer 47

reflection of light on the surface being measured

Question 48

what is the actuator used in most all gauges?

Answer 48

bourdon tube

Question 49

According to the modules, with refrigeration the term tube and pipe are sized by:

Answer 49

Tube Inside diameter, Pipe Outside diameter

Question 50

Which bearing do not get greased? Ball Bearings Pillow Block Bearings Roller Bearings Sleeve Bearings

Answer 50

Sleeve Bearings