ELECTRICANS HELPERS EXAM
QUESTIONS AND ANSWERS
In the American wire gauge, the CMA doubles every - Correct Answers -3 wire sizes
That portion of a wiring system extending beyond the final overcurrent device is called -
Correct Answers -Branch Circuit
As compared to a #10, a #8 wire of the same length has less - Correct Answers -
Resistance
The resistance of copper wire is - Correct Answers -Inversely proportional to its length
The reciprocal of resistance is - Correct Answers -Conductance
The combination of resistance, capacitance and inductance of an A.C Circuit is known
as - Correct Answers -Impedance
The perfect insulating material for electrical use is - Correct Answers -Rubber
Electrical equipment may be fastened to solid masonry with - Correct Answers -
Expansion Anchors
A tool commonly used to anchor equipment to a masonry wall is - Correct Answers -
Expansion Anchor
Small cuts or injuries should be - Correct Answers -Cared for immediately because
infection may result
Which is not a safe practice for lifting heavy objects - Correct Answers -If there is feeling
of restraint, continue lifting until you get help
When three resistances each of a different value are connected in parallel, the total
resistance of the combination is - Correct Answers -Equal to the average resistance
The lubricant commonly used to make it easier to pull braid covered cable into a duct is
- Correct Answers –Soapstone
The conductor insulation which may be used in wet locations is type - Correct Answers -
RHW
, A flexible cord may not be smaller than number - Correct Answers -18
The conductor insulation used for fixture wire is - Correct Answers -TFF
All continuous-duty motors shall be provided with overload protection if size greater than
- Correct Answers -1 HP
The motor disconnecting means shall be located - Correct Answers -Within sight of the
controller
In loosening a nut, a socket wrench with a ratchet handle should be in preference to
other types of wrenches if - Correct Answers -The turning space for the handle is limited
Another name for a pipe wrench is a - Correct Answers -Stillson wrench
The tool used to cut raceways is a hacksaw with fine teeth, commonly known as -
Correct Answers -Tube saw
Lead expansion anchors are commonly used to fasten conduit to a - Correct Answers -
Solid concrete wall
Definite time relays operate - Correct Answers -At the same speed for an overload of
any value
Solders used for electrical connections are alloys of - Correct Answers -Tin and lead
The use of "running" threads when coupling two sections of conduit - Correct Answers -
Always poor practice
A quick-break knife switch is often used rather than a standard-knife switch of the same
rating because the quick-break switch - Correct Answers -Resists buring, due to arcing
at the contacts points
The main contributing factor to motor started-failures usually is - Correct Answers -Dirt
The best way to join two lengths of conduit which cannot be turned is - Correct Answers
-Use conduit union (Erickson)
When an electrical splice is wrapped with both rubber tape and friction tape, the main
purpose of the friction tape us to - Correct Answers -Protect the rubber tape
To measure the current in a conductor without breaking into the conductor you would
use an - Correct Answers -Amprobe
QUESTIONS AND ANSWERS
In the American wire gauge, the CMA doubles every - Correct Answers -3 wire sizes
That portion of a wiring system extending beyond the final overcurrent device is called -
Correct Answers -Branch Circuit
As compared to a #10, a #8 wire of the same length has less - Correct Answers -
Resistance
The resistance of copper wire is - Correct Answers -Inversely proportional to its length
The reciprocal of resistance is - Correct Answers -Conductance
The combination of resistance, capacitance and inductance of an A.C Circuit is known
as - Correct Answers -Impedance
The perfect insulating material for electrical use is - Correct Answers -Rubber
Electrical equipment may be fastened to solid masonry with - Correct Answers -
Expansion Anchors
A tool commonly used to anchor equipment to a masonry wall is - Correct Answers -
Expansion Anchor
Small cuts or injuries should be - Correct Answers -Cared for immediately because
infection may result
Which is not a safe practice for lifting heavy objects - Correct Answers -If there is feeling
of restraint, continue lifting until you get help
When three resistances each of a different value are connected in parallel, the total
resistance of the combination is - Correct Answers -Equal to the average resistance
The lubricant commonly used to make it easier to pull braid covered cable into a duct is
- Correct Answers –Soapstone
The conductor insulation which may be used in wet locations is type - Correct Answers -
RHW
, A flexible cord may not be smaller than number - Correct Answers -18
The conductor insulation used for fixture wire is - Correct Answers -TFF
All continuous-duty motors shall be provided with overload protection if size greater than
- Correct Answers -1 HP
The motor disconnecting means shall be located - Correct Answers -Within sight of the
controller
In loosening a nut, a socket wrench with a ratchet handle should be in preference to
other types of wrenches if - Correct Answers -The turning space for the handle is limited
Another name for a pipe wrench is a - Correct Answers -Stillson wrench
The tool used to cut raceways is a hacksaw with fine teeth, commonly known as -
Correct Answers -Tube saw
Lead expansion anchors are commonly used to fasten conduit to a - Correct Answers -
Solid concrete wall
Definite time relays operate - Correct Answers -At the same speed for an overload of
any value
Solders used for electrical connections are alloys of - Correct Answers -Tin and lead
The use of "running" threads when coupling two sections of conduit - Correct Answers -
Always poor practice
A quick-break knife switch is often used rather than a standard-knife switch of the same
rating because the quick-break switch - Correct Answers -Resists buring, due to arcing
at the contacts points
The main contributing factor to motor started-failures usually is - Correct Answers -Dirt
The best way to join two lengths of conduit which cannot be turned is - Correct Answers
-Use conduit union (Erickson)
When an electrical splice is wrapped with both rubber tape and friction tape, the main
purpose of the friction tape us to - Correct Answers -Protect the rubber tape
To measure the current in a conductor without breaking into the conductor you would
use an - Correct Answers -Amprobe
