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Worksheets3 phase power
Total questions: 10
Worksheet time: 6mins
Name
Class
Date
1.
what is the frequency of power in a fundamental three phase supply
a)
150hz
b)
50hz
c)
60hz
d)
300hz
2.
what is a KWh meter used for
a)
charge for electricity
b)
fault finding
c)
home efficiency
d)
supply current
3.
how do we determine equipment to be installed based on size of consumer mains
a)
supply authority
b)
maximum demand
c)
CB size
d)
length
4.
when would we most likely use a 3 wattmeter method to measure power
a)
balanced load
b)
star
c)
unbalanced load
d)
delta
5.
what is added into our equation for 3 phase power
a)
x3
b)
x 3
c)
÷3
d)
÷3
6.
motors are rated
a)
kVA
b)
KVAr
c)
Kw
7.
transformers are rated
a)
kVA
b)
KVAr
c)
Kw
8.
capacitors power rating is
a)
kVA
b)
KVAr
c)
Kw
9.
what components consume power
(a)
10.
what does OP stand for
a)
off power
b)
off phase
c)
off program
d)
off peak
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