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WorksheetsElectrical Four_3
Total questions: 10
Worksheet time: 5mins
Name
Class
Date
1.
In the event of a normal power supply failure, standby power for an emergency system must be available within _____.
a)
10 seconds of the failure Option 1*
b)
30 seconds of the failure
c)
60 seconds of the failure
d)
5 minutes of the failure
2.
Legally required standby systems are covered in _____.
a)
NEC Article 700
b)
NEC Article 701
c)
NEC Article 702
d)
NEC Article 705
3.
The field windings of an AC generator are located on the _____.
a)
Rotor of the generator
b)
Stator of the generator
c)
Transfer switch of the generator
d)
Exciter of the generator
4.
A stator is _____.
a)
The rotating element of a motor or generator
b)
The stationary part of a motor or
generator
c)
A device that supplies direct current
d)
Not a part of a motor or generator
5.
All of the following are part of an AC generator, except a(n) _____.
a)
Stator
b)
Rotor
c)
Transfer switch
d)
Exciter
6.
When sizing a generator set once the starting and running loads have been determined, it is common to add a margin factor for future expansion of up to _____.
a)
10%
b)
15%
c)
25%
d)
33%
7.
In an automatic transfer switch, transfer to emergency/standby power is initiated by an external signal from a remote control.
a)
True
b)
False
8.
The specific gravity of sulfuric acid when a battery is discharged is near _____.
a)
1.10
b)
1.15
c)
1.20
d)
1.28
9.
How often should the intercell connections of a vented lead-acid battery bank be resistance tested with a digital low-resistance ohmmeter?
a)
Monthly
b)
Quarterly
c)
Annually
d)
Bi-annually
10.
Each of the following is an advantage of a double-conversion UPS system, except _____
a)
Zero transfer time is possible
b)
Quiet operation
c)
Excellent efficiency in all
applications
d)
Excellent frequency stability
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