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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
primary coil
B
iron core
C
load
D
secondary coil
2) What is the IEA for a transformer that has ni of 300 and no of 600?
A
2
B
300
C
900
D
0.5
3) The actual mechanical advantage of a transformer is less than the ideal mechanical advantage because of
A
area
B
force
C
resistance
D
current
4) The basic unit used to measure electrical current is the
A
joule
B
amp
C
watt
D
volt
5) If you know the specific ratio of wire turns in a transformer, you can find the
A
AMA
B
IEA
C
AEA
D
IMA
6) The ratio of power out to power in equals
A
current
B
voltage
C
efficiency
D
transmission
7) this can step up or step down voltage and current
A
conductor
B
voltmeter
C
multimeter
D
electrical force transformer
8) A transformer that decreases this is called a step down transformer
A
voltage
B
source
C
current
D
power
9) To find the amount of electric power, you multiply the voltage times the
A
current
B
power
C
transformer
D
mechanical advantage
10) Electrical transformers can step up or step down:
A
neither voltage nor current
B
both voltage and current
C
current only
D
voltage only
*select an answer for all questions
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