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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
secondary coil
C
load
D
iron core
2) What is the IEA for a transformer that has ni of 300 and no of 600?
A
0.5
B
900
C
300
D
2
3) The actual mechanical advantage of a transformer is less than the ideal mechanical advantage because of
A
force
B
area
C
resistance
D
current
4) The basic unit used to measure electrical current is the
A
joule
B
amp
C
volt
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
current
B
efficiency
C
voltage
D
transmission
7) this can step up or step down voltage and current
A
voltmeter
B
conductor
C
multimeter
D
electrical force transformer
8) A transformer that decreases this is called a step down transformer
A
voltage
B
current
C
source
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
current only
B
neither voltage nor current
C
both voltage and current
D
voltage only
*select an answer for all questions
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