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Worksheetsautomotive electrical
Total questions: 33
Worksheet time: 18mins
What is the resistance in this circuit?
0.05Ω
1.8Ω
20Ω
Resistance in wire can vary on how thick it is, how long it is and what it is made of.
true
false
The fuse in a circuit melts when:
An appliance isn't grounded
Excessive current flows
There is an open
A short to power occurs
Measure of electrical current flow
Circuit
Amp
Ground
Watt
What is a Parallel circuit?
Has only one path
Has more than one path
Allows energy to travel through easily
Puts a stop to current flow
Tech A says when disconnecting a battery always disconnect the negative cable first. Tech B says when reconnecting cables always connect the positive cable first. Who is correct?
Tech A
Tech B
Both
Neither
What test instrument would you use to check the open circuit voltage of a battery?
ammeter
ohm meter
test light
voltmeter
what is the symbol for voltage used in calculations
R
E
A
I
high resistance in an electrical circuit can cause
dim lights
slow motor operation
clicking of relay or solinoids
all of these
A short to ground will
never blow a fuse
blow a fuse
sometimes blow a fuse
work correctly
What materials make a good insulator?
Copper and aluminum
Ceramic and plastic
Both A and B
None of the above
Tech A says a resistor is a component designed to extract/slow energy from the current flow. Tech B says he uses a voltmeter to check for a voltage drop. Who is correct?
Tech A
Tech B
Both Techs A and B
Neither Tech A nor B
Tech A says when you ground a circuit, you hook it back to the positive side of the battery. Tech B says some manufactures use the chassis as a return path to the battery. Who is correct?
Tech A
Tech B
Both Techs A and B
Neither Tech A nor B
Continuity is:
when the current flows to the ground.
not a complete circuit.
a continuous circuit.
where the current takes a shorter path,
You have a 4 ohm resister and the battery is charged to 12 volts. How many amps will flow in this circuit?
1 amp
2 amps
3 amps
4 amps
How many paths are there in a series circuit?
1
2
3
4
A switch is used to:
protect a circuit.
allow current to flow only one way
reduce the current flow.
turn current flow on and off.
Tech A says relays are turned on and off by a small amount of current. Tech B says there are two types of relays: normally closed (NC) and normally open (NO) types. Who is correct?
Tech A
Tech B
Both Techs A and B
Neither Tech A nor B
Tech A says there are three standard labeling systems for relays. Tech B says relays are labeled 85, 86, 30, 87a, and 87, or 1, 2, 3, 4, and 5. Who is correct?
Tech A
Tech B
Both Techs A and B
Neither Tech A nor B
Tech A says wire size is very important. Tech B says there are two scales used to measure wire size. Who is correct?
Tech A
Tech B
Both Techs A and B
Neither Tech A nor B
Tech A says copper has a low resistance. Tech B says the length of wire doesn't affect resistance. Who is correct?
Tech A
Tech B
Both Techs A and B
Neither Tech A nor B
Tech A says you should never strip wires with a knife or other sharp tool. Tech B says it's ok to repair wires with solderless connectors if done properly. Who is correct?
Tech A
Tech B
Both Techs A and B
Neither Tech A nor B
In calculating ohm's law:
R stands for resistance.
A stands for amps.
V stands for voltage.
All of the above
