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Self-Test 1 Q&A 4-2
Self-Test Questions Volume 1
Question | Answer |
---|---|
What is the purpose of a switch? | To connect and disconnect electrical circuits or components to and from the power source. |
How are switches rated? | Switches are rated according to voltage and amperage capacities for the job it is chosen to do. |
How are single-pole toggle switches mounted? | Single-pole switches must always be mounted inside a switch-box. A switch –plate is then installed over the switch and box. When you install a switch, mount it in the box so the toggle points up when the switch is on. |
How many terminals does a double-pole switch have? | Four |
What switches may control a light or lights from two locations? | Two three-way switches |
A three-way switch has how many terminals? | Three |
What switches control a light or lights from more than two locations? | Two three-way switches and any number of four-way switches. |
Knife-blade switches equipped with three blades must open how many conductor(s) and in what order? | All conductors at the same time. |
How must a circuit breaker used as a switch for a 120-volt, fluorescent light circuit be marked? | SWD |
A circuit breaker used as a switch for a 120-volt, fluorescent light circuit should be mounted, in its highest position, so that the handle is mounted no more than how many feet above the floor? | 6 feet, 7 inches (79 inches). |
What is the device called that completes the connection between the receptacle and the equipment being served with power? | Attachment plug |
What is the function of a receptacle outlet? | To make it easy to connect and disconnect portable appliances, tools, and other electrical devices |
What precautions should you take when ordering a heavy-duty receptacle? | A heavy-duty receptacle is ordered for a specific voltage, amperage, and number of contact pins required |
Used frequently for window air-conditioners | 208/240 volt, 15-ampere receptacle |
Straight slot, used for ranges | 125/250 volt, 50-ampere receptacle |
L-slot, used for dryers | 125/250 volt, 30-ampere receptacle |
Parallel slot, wired with an equipment ground | 120 volt, three-wire duplex. |
Grooved case for alignment | 220/440 volt, three-phase receptacle |