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7.4
Test Description: Transformers in Electrical
Instructions: Answer all questions to get your test result.
1) Which of the following is not a part of a transformer?
A
iron core
B
secondary coil
C
primary coil
D
load
2) What is the IEA for a transformer that has ni of 300 and no of 600?
A
2
B
900
C
300
D
0.5
3) The actual mechanical advantage of a transformer is less than the ideal mechanical advantage because of
A
current
B
force
C
area
D
resistance
4) The basic unit used to measure electrical current is the
A
volt
B
amp
C
joule
D
watt
5) If you know the specific ratio of wire turns in a transformer, you can find the
A
AEA
B
IMA
C
AMA
D
IEA
6) The ratio of power out to power in equals
A
efficiency
B
voltage
C
current
D
transmission
7) this can step up or step down voltage and current
A
conductor
B
voltmeter
C
electrical force transformer
D
multimeter
8) A transformer that decreases this is called a step down transformer
A
power
B
voltage
C
source
D
current
9) To find the amount of electric power, you multiply the voltage times the
A
power
B
current
C
mechanical advantage
D
transformer
10) Electrical transformers can step up or step down:
A
voltage only
B
neither voltage nor current
C
current only
D
both voltage and current
*select an answer for all questions
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