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2008 NEC Review Practice Test 9

Course Name: 2008 NEC Review
Quiz Number:  No. 9
Teacher:  Gerald Newton
Teacher's Home Page:  http://www.electrician2.com
Teacher's Email:  electrician@electrician2.com

No. of Questions= 20


1 The branch circuit load for a 12-kilowatt electric range in a dwelling is 8-kilowatts.
            
a)
True
b)
False
2 An appliance always requires a disconnecting means.
            
a)
True
b)
False
3 A 40-ampere branch circuit may supply several fixed electric space heaters in a dwelling.
            
a)
True
b)
False
4 The rating of the overcurrent protective device for a circuit supplying a hermetic motor-compressor may not exceed 225% of the rated load current under any circumstances.
            
a)
True
b)
False
5 To measure the area of a dwelling to determine the lighting load, the outside dimensions, including the garage, are used.
            
a)
True
b)
False
6 Under no circumstances can the continuous load supplied by a branch circuit exceed 80% of the conductor ampacity before the application of any derating factors..
            
a)
True
b)
False
7 A 20-ampere laundry circuit is always required in each dwelling unit.
            
a)
True
b)
False
8 Branch circuit conductors supplying fixed resistive type space heaters must be rated at 125% of the heater load.
            
a)
True
b)
False
9 The computed load of a feeder shall not be less than the sum of the loads on the branch circuits after any applicable demand factors have been applied.
            
a)
True
b)
False
10 When the standard calculation method is used, the minimum feeder load for a household electric clothes dryer is 5,000 watts.
            
a)
True
b)
False
11 The optional calculation method for a dwelling unit may be used when the service is a two-wire, 120-volt service.
            
a)
True
b)
False
12 The optional calculation method for multi-family dwellings does not apply to dwellings whose units have neither electric space heating nor air-conditioning.
      
a)
True
b)
False
13 The service-entrance equipment for a one-family dwelling, if rated 200-amperes and installed indoors, must be illuminated.
            
a)
True
b)
False
14 The working clearance in front of live parts, operating at 120-volts, must be at least three feet.
      
a)
True
b)
False
15 The minimum headroom around a motor control center must be 6 feet.
            
a)
True
b)
False
16 On a switchboard with bus bars, normally, phase B would have the highest voltage to ground in a high-leg delta arrangement.
            
a)
True
b)
False
17 All panelboards shall have a rating not less than the minimum feeder capacity required for the calculated load.
      
a)
True
b)
False
18 In general, a panelboard shall be protected by an overcurrent protective device having a rating not greater than that of the panelboard. This overcurrent protective device shall be located within the panelboard.
            
a)
True
b)
False
19 The grounding terminal bar is not connected to the neutral bar in a panel board not used as service equipment.
            
a)
True
b)
False
20 Transformers rated over 35,000-volts must be installed in a vault.
            
a)
True
b)
False





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