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R1,R2,R5,T1,T2,I1,I2 Flashcards | StudBud
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R1,R2,R5,T1,T2,I1,I2
R1,R2,R5,T1,T2,I1,I2
55 terms
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#secondyearelectrical
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Questions
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Answers
1
What are two functions of a fluorescent lamp ballast?
Who cares
Low voltage start up, no limit
Nothing
High starting voltage, limits current
2
List 2 types of electrical faults
Negative to negative positive to positive
Phase to phase, phase to ground
Ground to ground, neutral to neutral
Line-to-line, line-to-ground
3
An LPS lamp has___ color rendition
The best
So much
Good
Poor
4
Modern energy saving fluorescent lamps:
Save energy with only slightly reduced light output
Modern problems require modern solutions
My thumbs are tired
Aren’t as bright as metal halide
5
Which lamp type requires the highest striking voltage?
Metal halide
HID
LPS
Fluorescent
6
What is the maximum interrupting-capacity rating for standard fuses?
400a
20000a
10000 a
10 a
7
The receptacle used by unit equipment must be mounted no less then __m above floor height.
2.5
3
2
1.5
8
What light has the best CRI?
Mercury vapor
Incandescent
Fluorescent
Metal halide
9
Emergency lighting must last for how long in every instance?
5 mins
1 hour
30 mins
15 mins
10
If the voltage at the lamp socket is less then __% of the required OCV, the ballast should be replaced.
10
80
90
60
11
“BT”
Big tunes
Bullet tubular
Bulged tubular
Big tube
12
What two advantages does fluorescent lighting have over incandescent?
Higher efficacy, longer life
Faster start up time, better re strike time
Easier to change, brighter
Comes in bundles, longer life span
13
Which of the following is not considered a piece of utilization equipment?
Motorcycle
Electric clothes dryer
Street light
Electric range
14
What is not a consequence of a fault condition on an electrical system?
Explosion
Correct polarity
Arc flash
Over heating
15
What bulb has the worst re strike time
Metal halide
HID
Fluorescent
Mercury vapor
16
The as built drawings of a project are:
Landscaping drawings
Work that still has to be done
Placed on the fridge door
Final product
17
What is the minimum number of lamps required to be connected to unit equipment?
1
4
3
2
18
Surges on a system are transient and typically only last a few__
Moments
Milliseconds
Minutes
Days
19
Letter used to indicate a time delay fuse?
M
D
N
T
20
What is the name of the breaker that provides over current protection only?
Gfci
Instantaneous trip circuit interrupted
Over current breaker
Trip free
21
The majority of SPD’s will have a surge current rating of ____.
30-40Ka
50-60Ka
10-20Ka
80-100ka
22
What maximum current & voltage ratings are available for plug fuses?
30a , 150v
20a, 120v
15a, 120v
20a , 208v
23
What is meant by OCV?
Over current voltage
Open circuit voltage
Over circuit voltage
Open current voltage
24
What lighting has the best strike up and re-strike time
Fluorescent
Mercury vapor
Incandescent
Metal halide
25
What is the purpose of a circuit breaker?
Be trip free
Turn lights off
To open a circuit under overload and over current conditions
26
Under what condition must an HRC fuse be used for circuit protection?
FC exceeds 20,000a
FC exceeds 10,000a
FC exceeds 100ka
FC exceeds 2000a
27
It is acceptable to use an isolation switch to be used to de-energize a load.
True
False
28
At what height must unit equipment be mounted?
3m
2m
1.5 m
2.5m
29
What fuse term is used instead of time delay?
Delay of game fuse
Trip free
Time delay fuse
Dual-element fuse
30
If using a reducing washer, a separate means of bonding is required.
False
True
31
If an enclosure does not have factory knockouts, an electrician must cut them in by means of:
Unibit
Hole saw
All of the above
Knockout cutters
32
What is the typical efficacy of induction lamps?
65-70 lumens/w
45-50 lumens/w
25-30 lumens/W
55-60 lumens/W
33
After how many hours does light output start to rapidly decrease?
100
5
1000
20000
34
What’s the interrupting rating of a HRC fuse?
50a
100ka
200ka
10v
35
What is the most common ballast used for metal-halide lamps?
Reactor ballast
Auto transformer ballast
Two lamp ballast
Auto regulator ballast
36
“E”
Elliptical
Empty
Eeeeese
Even
37
What’s the minimum trip rating of a ground fault circuit interrupter?
15 amps
80% of the load
5ma
10v
38
Flickering is normal in fluorescent lighting.
True
False
39
A permanent record of maintenance & inspections must be kept for u it equipment.
True
False
40
For the following 5 questions what does the letter code stand for? “B”
Bacon
Bullet
Bubble
Bulge
41
The life of a ballast is reduced by__% for each__ degree Celsius increase above the design temperature.
20, 30
10, 50
40, 20
50, 10
42
Major cause of ballast failure
Cold temperatures
High temperatures
Over use
Leaving the lights on
43
What does MR stand for?
Moist reps
Must read
Multifaceted reflector
Multi rotating
44
Average life of a fluorescent lamp?
10000hrs
100 hrs
50000hrs
250hrs
45
“T”
Time
Tubular
Tube
Triangle
46
Surges that are produced from events inside a buildings electrical system are the most destructive
True
False
47
What voltage do HID lamps normally operate at?
700v
Above 600v
700v
Under 600v
48
It is acceptable to leave the distribution panel directory completely blank.
False
True
49
How is a secondary battery charged?
Passing Dc current through opposite to the direction of discharge
Solar power
Friction
Making up wrong answers is hard
50
What size do factory knockouts start at?
1/2”
3/8”
1”
2”
51
“PAR”
Parts auto rectifier
Part
Parabolic aluminized reflector
Parabolic auto reflector
52
Mercury lamps can operate in any:
Position
Weather
Room
Condition
53
What lamp has the worst CRI
Fluorescent- warm white
Mercury vapor
Metal halide
Fluorescent- cool white
54
The Term for a breaker that trips even when held in the on position:
Trip free
Skip free
Lmnop free
Slip free
55
Frequently, emergency lighting takes the form of unit equipment, this housing contains:
Test switch
All of the above
Transfer relay
Rechargeable battery
