Electricians Helpers Exam – Electrical Trade
Fundamentals – study material
In the American wire gauge, the CMA doubles every - ANS ✔✔3 wire sizes
That portion of a wiring system extending beyond the final overcurrent device is called - ANS
✔✔Branch Circuit
As compared to a #10, a #8 wire of the same length has less - ANS ✔✔Resistance
The resistance of copper wire is - ANS ✔✔Inversely proportional to its length
The reciprocal of resistance is - ANS ✔✔Conductance
The combination of resistance, capacitance and inductance of an A.C Circuit is known as - ANS
✔✔Impedance
The perfect insulating material for electrical use is - ANS ✔✔Rubber
Electrical equipment may be fastened to solid masonry with - ANS ✔✔Expansion Anchors
A tool commonly used to anchor equipment to a masonry wall is - ANS ✔✔Expansion Anchor
Small cuts or injuries should be - ANS ✔✔Cared for immediately because infection may result
, Which is not a safe practice for lifting heavy objects - ANS ✔✔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 - ANS ✔✔Equal to the average resistance
The lubricant commonly used to make it easier to pull braid covered cable into a duct is - ANS
✔✔Soapstone
In loosening a nut, a socket wrench with a ratchet handle should be in preference to other types
of wrenches if - ANS ✔✔The turning space for the handle is limited
Another name for a pipe wrench is a - ANS ✔✔Stillson wrench
The tool used to cut raceways is a hacksaw with fine teeth, commonly known as - ANS ✔✔Tube
saw
Lead expansion anchors are commonly used to fasten conduit to a - ANS ✔✔Solid concrete wall
Definite time relays operate - ANS ✔✔At the same speed for an overload of any value
Solders used for electrical connections are alloys of - ANS ✔✔Tin and lead
The use of "running" threads when coupling two sections of conduit - ANS ✔✔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 - ANS ✔✔Resists buring, due to arcing at the contacts points
Fundamentals – study material
In the American wire gauge, the CMA doubles every - ANS ✔✔3 wire sizes
That portion of a wiring system extending beyond the final overcurrent device is called - ANS
✔✔Branch Circuit
As compared to a #10, a #8 wire of the same length has less - ANS ✔✔Resistance
The resistance of copper wire is - ANS ✔✔Inversely proportional to its length
The reciprocal of resistance is - ANS ✔✔Conductance
The combination of resistance, capacitance and inductance of an A.C Circuit is known as - ANS
✔✔Impedance
The perfect insulating material for electrical use is - ANS ✔✔Rubber
Electrical equipment may be fastened to solid masonry with - ANS ✔✔Expansion Anchors
A tool commonly used to anchor equipment to a masonry wall is - ANS ✔✔Expansion Anchor
Small cuts or injuries should be - ANS ✔✔Cared for immediately because infection may result
, Which is not a safe practice for lifting heavy objects - ANS ✔✔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 - ANS ✔✔Equal to the average resistance
The lubricant commonly used to make it easier to pull braid covered cable into a duct is - ANS
✔✔Soapstone
In loosening a nut, a socket wrench with a ratchet handle should be in preference to other types
of wrenches if - ANS ✔✔The turning space for the handle is limited
Another name for a pipe wrench is a - ANS ✔✔Stillson wrench
The tool used to cut raceways is a hacksaw with fine teeth, commonly known as - ANS ✔✔Tube
saw
Lead expansion anchors are commonly used to fasten conduit to a - ANS ✔✔Solid concrete wall
Definite time relays operate - ANS ✔✔At the same speed for an overload of any value
Solders used for electrical connections are alloys of - ANS ✔✔Tin and lead
The use of "running" threads when coupling two sections of conduit - ANS ✔✔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 - ANS ✔✔Resists buring, due to arcing at the contacts points
