C 10 Electrical Exam Part IV UPDATED ACTUAL QUESTIONS AND CORRECT
ANSWERS
A temporary electrical service has to be installed on a The Correct Answer Is D
rocky hillside. How would it be grounded? Code 250-52, drive the electrode to a depth of 8 ft. execept where rock bottom is
A encountered. The electrode shall be driven at an oblique angle not to exceed 45
Bury an electrode 18 in. in the ground. degrees from the verticle, or shall be buried in a trench that is 2-1/2 feet deep.
B
Pound an 8 foot rod into the ground 6 feet.
C
Pound an 8 foot rod into the ground as far as possible,
cut off the rest.
D
Drive the rod to a depth of 8 ft.
How would you ground a transformer in a wood The Correct Answer Is C
structure?
A
Ground it to a driven ground rod.
B
Ground it to a cold water ground within 5 feet of where it
enters the building.
C
A or B.
D
None of the above.
,If you were installing a 30 KVA 480/208, 120v transformer, The Correct Answer Is D
where would you ground it?
A
On the primary side.
B
On the parallel side.
C
On the neutral side.
D
On the secondary side on x.
A building includes an office space, a textile room and a The Correct Answer Is B
paint shop. Where would you install a sub panel?
A
Outside next to the main.
B
Inside equal distance from the load.
C
Opposite side of panel.
D
The utility company will determine location.
An Edison is used as __ _. The Correct Answer Is B
A An Edison is used as a fuse holder for type-S fuses.
a testing gauge
B
a fuse holder for type-S fuses
C
a tool for bending
D
an electricians measuring device
The service panel is hot. What could be a problem? The Correct Answer Is D
A
Ground to neutral open
B
Low amperage
C
Neutral open
D
Neutral grounded
A C cable is required to be strapped within ____ inches of The Correct Answer Is C
every outlet box, junction box, cabinet, or fitting and at Code 333-1 says a C cable is required to be strapped within 12 inches of every
intervals not exceeding _____ outlet box, junction box, cabinet, or fitting and at intervals not exceeding 4 ft.-6
A in.
6 in., 3 ft.
B
10 in., 3 ft.-6 in.
C
12 in., 4 ft.-6 in.
D
12 in., 6 ft.-6 in.
, How far from the box does EMT have to be strapped? The Correct Answer Is A
A
Within 36 in. from the box.
B
Within 40 in. from the box.
C
Within 48 in. from the box.
D
Within 60 in. from the box.
The ohmmeter is pegged to the right when put across the The Correct Answer Is D
capacitor of a motor starter circuit. What is wrong with
this mortar?
A
Nothing
B
Capacitor is OK
C
It is reversed
D
A and B.
A motor with an over current protector and a thermal The Correct Answer Is D
protector trips off. What could be the cause?
A
Heat produced in the conductor
B
Excessive current
C
Excessive load
D
A combination of the above.
In another case a motor has an over current protector The Correct Answer Is A
but this time just the thermal protector causes the motor Thermal overload relays are used to protect the motor. They are sized usually
to trip off. What could be the cause? between 115 percent to 125 percent. They respond to the heat generated by the
A current flowing through them.
Heat produced in the conductor.
B
Thermal element is too large.
C
Limited thermal elements.
D
The motor is too small.
ANSWERS
A temporary electrical service has to be installed on a The Correct Answer Is D
rocky hillside. How would it be grounded? Code 250-52, drive the electrode to a depth of 8 ft. execept where rock bottom is
A encountered. The electrode shall be driven at an oblique angle not to exceed 45
Bury an electrode 18 in. in the ground. degrees from the verticle, or shall be buried in a trench that is 2-1/2 feet deep.
B
Pound an 8 foot rod into the ground 6 feet.
C
Pound an 8 foot rod into the ground as far as possible,
cut off the rest.
D
Drive the rod to a depth of 8 ft.
How would you ground a transformer in a wood The Correct Answer Is C
structure?
A
Ground it to a driven ground rod.
B
Ground it to a cold water ground within 5 feet of where it
enters the building.
C
A or B.
D
None of the above.
,If you were installing a 30 KVA 480/208, 120v transformer, The Correct Answer Is D
where would you ground it?
A
On the primary side.
B
On the parallel side.
C
On the neutral side.
D
On the secondary side on x.
A building includes an office space, a textile room and a The Correct Answer Is B
paint shop. Where would you install a sub panel?
A
Outside next to the main.
B
Inside equal distance from the load.
C
Opposite side of panel.
D
The utility company will determine location.
An Edison is used as __ _. The Correct Answer Is B
A An Edison is used as a fuse holder for type-S fuses.
a testing gauge
B
a fuse holder for type-S fuses
C
a tool for bending
D
an electricians measuring device
The service panel is hot. What could be a problem? The Correct Answer Is D
A
Ground to neutral open
B
Low amperage
C
Neutral open
D
Neutral grounded
A C cable is required to be strapped within ____ inches of The Correct Answer Is C
every outlet box, junction box, cabinet, or fitting and at Code 333-1 says a C cable is required to be strapped within 12 inches of every
intervals not exceeding _____ outlet box, junction box, cabinet, or fitting and at intervals not exceeding 4 ft.-6
A in.
6 in., 3 ft.
B
10 in., 3 ft.-6 in.
C
12 in., 4 ft.-6 in.
D
12 in., 6 ft.-6 in.
, How far from the box does EMT have to be strapped? The Correct Answer Is A
A
Within 36 in. from the box.
B
Within 40 in. from the box.
C
Within 48 in. from the box.
D
Within 60 in. from the box.
The ohmmeter is pegged to the right when put across the The Correct Answer Is D
capacitor of a motor starter circuit. What is wrong with
this mortar?
A
Nothing
B
Capacitor is OK
C
It is reversed
D
A and B.
A motor with an over current protector and a thermal The Correct Answer Is D
protector trips off. What could be the cause?
A
Heat produced in the conductor
B
Excessive current
C
Excessive load
D
A combination of the above.
In another case a motor has an over current protector The Correct Answer Is A
but this time just the thermal protector causes the motor Thermal overload relays are used to protect the motor. They are sized usually
to trip off. What could be the cause? between 115 percent to 125 percent. They respond to the heat generated by the
A current flowing through them.
Heat produced in the conductor.
B
Thermal element is too large.
C
Limited thermal elements.
D
The motor is too small.
