1. When you first start making splices, you should judge your work according to ______. Later on, when you become more experienced, you should concentrate on __________.a. how long it makes you to complete; the quality of the connections
b. the quality of the connections; how long it makes you to complete
c. how secure the splices are; using the minimun amount of material for each splice
d. using the minimum amount of material for each splice; the quality of the connections
2. Electrical codes in North America require the voltage at an outlet to be _________ of voltage that is available at the electrical panel where the circuit begins.
a. up to 5%
b. 5% or more
c. up to95%
d. 95 % or more
3. What is the name of the code that provides specifications for electrical wiring projects in the United States?
a. National Electricians' Code
b. National Code for Electrical Wiring
c. National Electrical Code
d. North American Electrical Code
If one of the cables in a three-wire cable is damaged, you can test each wire individually with an ohmmeter. How will you tell which one is faulty?
a. When the damaged wire is in the circuit, the test should show maximum resistance.
b. When the damaged wire is in the circuit, the test should low resistance
c. When the damaged wire is in the circuit, the test should show resistance clos to the middle of the range selected.
d. When the damaged wire is in the circuit, the tester should not work at all.
5. According the numbers from the U.S Department of Energy, there was a roughly ______increase in electric consumption in U.S homes between 1949-1958 and 1989-1998.
a. twofold
b. threefold
c. fivefold
d. tenfold
6. Conduits and raceways are ________________.
a. special types of conductors used mainly in industrial settings
b. metal boxes designed to hold a large number of splices
c. materials for protecting electrical cables or conductors in situations where they will be exposed to possible damage
d. special types of insulation designed to reduce voltage drop in very long cables wires
7. What is an electric Arc?a. a movement of electrons along a conductor
b. a negatively charged particle
c. a discharge of electricity between two electrodes
d. a piece of wire used to connect two or more wires to terminal or other device
8. Why must electricians be extra careful when calculating power requirement for circuits that will run motors?
a. Many motors draw more power when they first start up when they have been running for awhile, and the circuits must be able to handle this initial burst.
b. For many motors, the longer they are running, the more power they draw, so the circuits must be able to handle a large amount of power.
c. Many motors draw power in a cyclical fashion, alternating between high and low power requirements, and the circuits must be able to handle these variation.
d. Motor are generally used to run other large devices, and the circuits need to be able to supply enough power to run both the motor and the additional device (s)
9. An electrician is testing a switch with an ohmmeter. The switch is in the OFF position, and the probes of tester are attached to the two terminal screws. The ohmmeter returns a numerical reading. What conclusion can be drawn?a. the switch is working properly.
b. The switch is defective.
c. The probes of the ohmmeter are placed incorrectly.
d. No conclusion can be drawn without knowing the exact reading obtained.
10. Some Homeowners feel that there isn't enough electrical power available to them. What is the most likely cause of this problem?a. there is no enough power in the distribution system for their homes.
b. the wiring and panels in their homes are not capable of safely handling the power that would be necessary to run all of their electrical devices.
c. They are probably trying to run too many devices off of each outlet.
d. They probably have one large device that is using all of the power alloted to their home.
d. Tienen probablemente un dispositivo grande que esté utilizando toda la energía asignada a su hogar.
ELECTRICIAN COURSE
STRATFORD CAREER INSTITUTE
The electrician need to know how:
1. Read wiring diagrams for complex electrical circuits.
2. Know well National Electrical Code and regulations.
3. Skill to start electrical circuits, replacing and fixtures, wiring and components.
4. Know well about types of circuits and how they are wiring.
5. Some electrical safety precautions already.
6. Circuit design , capacity and limitations, or Code requirements. What is safe or legal.
7. Enough skill for the most common electrical jobs, and exposures you to live electricity.
EQUIPMENTS AND HANDS TOOLS:
1. Wire stripper.
2. Lineman's pliers.
3. Screwdrivers.
4. Cable ripping tool.
5. Utility Knife.
6. Electrical supply: Wire nuts different gage, electrical tape.
WIRE, STRIPPING AND SPLICING:
On a length of non-metallic cable, mark a spot on the outer sheath about 10 inches from one end. Remove the sheathing to expose the individual insulated wires inside. If you have a cable ripper, you can use it. However, make sure you do not nick the insulation on any of the individual conductor underneath. If you do, you will need to cut off the damaged part of the cable and start the exercise again. Peel back the cable sheath and any paper wrapping that might be around the conductors, and cut them off using the cutting jaws of your wire stripping tool or long-nose pliers.
Strip about 1 inch of insulation from each of the individual conductors, using the appropriately sized hole in your wire strippers and following the steps already described in the text. Eventually, you will need to work with a bit less than an inch of stripped wire, perhaps closer to 3/4 of an inch. However in the veginning give yourself plenty of wire to work with. Once you have mesterd the technique, you can try it on shorter lengths of stripped wire.
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