[D2L] Final Review Flashcards
What filler material would you use to connect Copper to Steel
Silver Alloy Wire (Silver brazing)
What is 95/5 when it comes to soldering/brazing?
solder made of tin and antimony
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
the provincial apprenticeship committee
who administers the b52 mechanical refrigeration code?
absa
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
plans for all aspects of a buildings construction
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
worker education, safety data sheets, and container labelling
which is the most versatile fire extinguisher?
multi-purpose dry chemical
how would you determine the distance the footing of your extension ladder should be from the wall you are climbing?
ladder height divided by 4
certain scaffolds do not require handrails
False
a class C involves?
electrical equipment
a 20’ scissor lift can be operated by workers with no specialized training?
T or F
False
what should be done if the rating tag has been ripped from a lifting sling?
sling should be destroyed
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
5/16” hex head self tapping tech screw
in metallurgy(금속공학), the term annealed means
a substance exposed to extreme heat and allowed to cool slowly in a controlled environment producing a soft workable product
how would a technician determine the grade of bolt that needs to be replaced?
the number of markings on the head of the bolt + 2
An installer should always utilize the strongest fasteners available in any application?
T or F
False
if a threaded fastener with thread lock or locktite is difficult to remove it should be
heated
brazing filler metal finds its way into the joint through
capilliary action
what kind of flare is used in refrigeration systems?
45* sae
38* auto
29* standard
40* metric
45* sae
the 2 grades of ACR copper are
L and K
to swage is to…
expand an opening in tubing for an equal size tubing to fit inside
in the interest of safety, what is the last step before a torch should be lit
soap test joints for leaking fuel
acetylene must always be transported and stored
upright
a regulator used for acetylene in our trade will reduce pressure from?
250-15psig
an acetylene valve is to be opened with a?
a valve wrench
at what temperature does copper melt?
1984*F
ACR copper is always sized by outside diameter because?
of varying wall thicknesses of grades and necessity of low clearance connections
the word spool is used to describe an arrangement of pipe and fittings for a given application
T or F
True
soldering to join copper uses filler metals that melt over 1100*F
T or F
False
Soldering to join copper typically uses filler metals that melt at temperatures below 840°F
brazing uses filler metals that melt below 500*F
T or F
False
Brazing uses filler metals that melt above 840°F
silver brazing (borax) flux is used with 85/15 brazing filler when
when joining copper to brass
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
A) before every use
C) whenever deemed necessary by an employers safety program
Bill c-45 (2003)places liability relating to your safety with who?
your direct supervisor as an appointed representative of your employer
why is the liability implication from c-45 so important to an apprenticeship training program?
because a journeyperson would be considered the direct supervisor of an apprentice
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
B) administrative controls
C) engineering controls
D) personal protective equipment
who is most responsible for your safety in the workplace?
you. the worker.
the WCB is
a non-profit organization that compensates workers for expenses relating to lost time/income and associated medical expenses
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
all of the above
your employer has the right to exceed safety expectations outlined in oh&s code
T or F
True
my employer has a legal obligation to provide me with the PPE required to perform my job safely
T or F
False
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
B) the PPE protects from dangerous noise levels
C) the PPE protects from respiratory damage
your service/valve wrench is used for
service valves
fan bushing set screws
adjusting thermostatic expansion valves
all of the above
service valves
a green handled Robertson screw driver is
1 for 5, 6, and 7 screws
interlocking joint pliers are also know as
pump pliers
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
both C & D
C) with 24-32 t.p.i.
D) no, we should not.
when are micrometers and calipers used?
when measurements must be accurate to within .001”
what limits the accuracy of an i.r. thermometer?
reflection of light on the surface being measured
what is the actuator used in most all gauges?
bourdon tube
According to the modules, with refrigeration the term tube and pipe are sized by:
Tube Inside diameter, Pipe Outside diameter
Which bearing do not get greased?
Ball Bearings
Pillow Block Bearings
Roller Bearings
Sleeve Bearings
Sleeve Bearings
