Job Info 1 Lvl 2 Test
What is the circular mil area of a wire having a diameter of 250 mils?
.25 or 1/4 divide by 1,000
What is the circular mil area of a wire having a diameter of 750 mils?
.75 or 3/4 divide by 1,000
Convert the following value: 212 mA = ___? amps 350 mA = ___? amps
0.212 0.350 or .35 move the decimal over left 3 spots
What is the circular mil area of a wire having a diameter of 500 mils?
0.5 or 1/2 divide by 1,000
If you bought a 2 liter bottle of wire lubricant, approximately how many pints did you buy? Given: 1 pint = 0.4732 liter
4.22
If the circular mil area for a No. 14 copper wire is 4,110 cm, what length of wire would be required to produce a resistance of 20 ohms? Use the approximate resistance method.
411x20=8220
Convert 0.528 inches to mils.
528 multiply by 1,000
Convert 0.650 inches to mils.
650 multiply by 1,000
If the circular mil area for a No. 12 copper wire is 6,530 cm, what length of wire would be required to produce a resistance of 12 ohms? Use the approximate resistance method.
653x12=7836
You have measured the diameter of a wire and found it to be ¾ inch. What is the diameter of the wire expressed in mils? 0.56 mils 0.75 mils 750 mils 5625 mils
750
Convert 0.785 inches to mils.
785 multiply by 1,000
You are bending and terminating an aluminum TYPE SER cable that measures 1.601 inch OD (outside diameter). The insulation thickness of one of the conductors is 0.068 inch. What is the minimum allowable bending radius?
8.0005
Which formula is used to find the circular mil area of a conductor?
Acmils=dmils2
Dual footswitches for wire pulling ___? Aid in communication Can save time and money Must both be depressed at the same time or the puller will not be energized All of the above
All of the above (ask)
Bends should be made to a single aluminum conductor ___? the terminal or conector is applied to the cable. After Before During the time Either before or after
Before
What type of fire-resistant rated assembly must have sufficient structural stability under fire conditions to allow collapse of construction on either side without collapse of the wall? Firewall Fire barrier Fire partition Smoke partition
Firewall
For wire sizes 1/0 AWG and larger, as the circular mil area of a wire increases, the AWG number ___? Decreases Doubles Increases Inverts
Increases
Using the prefix ___? Indicates that you should multiply a number by 0.000001. Kilo Mega Micro milli
Micro
What type of Aluminum cable is commonly used for residential services?
SE cable
Which material is the best electrical conductor?
Silver
Most general building wiring installed for power distribution is made of copper / tungsten alloy Hard drawn copper Medium drawn copper Soft drawn copper
Soft drawn copper
Which of the following factors does not help determine the resistance of a length of wire? The diameter of the wire The insulation used with the wire The length of the wire The type of material from which the wire is made
The type of material from which the wire is made
What is the significance of the "2" in the conductor insulation designated "RHW-2" This insulation consists of two layers of RHW This insulation has twice the insulating qualities of RHW This insulation is permitted to be used at a continuous 90°C This is a cable with two conductors
This insulation is permitted to be used at a continuous 90 C
During the process of terminating a properly stripped aluminum conductor(s) in a mechanical screw-type connector, the installer should ___? the conductor(s) and apply a listed aluminum joint compound on the exposed aluminum conductors(s) Clean File Wipe Wire brush
Wire brush
A fire partition has a minimum fire- resistance rating of ___? ½ hour 1 hour 2 hours 3 hours
`1 hour
