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WorksheetsElectrical Basics 2
Total questions: 14
Worksheet time: 9mins
Name
Class
Date
1.
When does terminal 75x have power?
a)
In the Run position only.
b)
In both the Start and Run position.
c)
Always.
d)
In the Start position only.
2.
When does terminal 50 have power?
a)
In the Run position only.
b)
In both the Start and Run position.
c)
Always.
d)
In the Start position only.
3.
When does terminal 15 have power?
a)
In the Start position only.
b)
In both the Start and Run position.
c)
In the Run position only.
d)
Always.
4.
The control (coil) of the relay is between which terminals?
a)
Terminal 30 and 87
b)
Terminal 86 and 87
c)
Terminal 85 and 86
d)
Terminal 30 and 86
5.
What happens inside a relay when current flows between terminal 85 and 86?
a)
An internal switch opens between terminal 30 and 85.
b)
An internal switch closes between terminal 30 and 87.
c)
An internal switch opens between terminal 30 and 87.
d)
An internal switch closes between terminal 85 and 86.
6.
What does the pictured symbol represent?
a)
A type of button.
b)
A type of sensor.
c)
A control module.
d)
A thermal fuse.
7.
Using the image, what will the voltage drop be across B4?
a)
12V
b)
0V
c)
3V
d)
4V
8.
What is a transistor?
a)
An electromagnetic switch
b)
A switch with more than one moving part.
c)
A switch that does not have any moving parts.
d)
A switch with 4 outputs.
9.
Use the image with a 12V source. B1, B2, B3 and B4 all equal 5Ω each. Which bulbs will be the brightest?
a)
B1, B2, and B3
b)
B4
c)
They will all be equally bright.
d)
None will produce light.
10.
If you measure full source voltage between ground and the ground side of a load, the circuit has ______
a)
15Ω of unwanted resistance.
b)
An open between power and the load.
c)
An open between the load and ground.
d)
An open between both the power and ground side of the load.
11.
Use the image with a 12V source. What is the fault with the circuit?
a)
B1 has opened leaving only 6V for B2.
b)
There is approximately 10Ω of unwanted resistance somewhere in the circuit.
c)
There is approximately 20Ω of unwanted resistance somewhere in the circuit.
d)
There is approximately 10kΩ in the ground connection.
12.
Use the image with a 12V source. What is wrong with the circuit?
a)
There is unwanted resistance between the power source and the load.
b)
Nothing. The circuit is dropping voltage where it was designed to.
c)
There is unwanted resistance between ground and the load.
d)
B1 is drawing too much current because it's too hot.
13.
Use the image with a 12V source. What is wrong with the circuit?
a)
Nothing. Voltage is dropping equally across each load because they are equal resistances in series.
b)
There is unwanted resistance in between B1 and B2.
c)
There is unwanted resistance between B2 and ground.
d)
There is too much total resistance.
14.
As a bulb heats up, its resistance ______ and current ______.
a)
is constant, increases
b)
decreases, increases
c)
slows down, speeds up
d)
increases, decreases
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