C-47 Manufactured Housing Exam

Welcome to your free C-47 Manufactured Housing Exam

1. 
When would you use a crane to install a mobile home?

2. 
A 1/4 inch scale refers to:

3. 
What is the minimum size THWN branch circuit conductor required for a 20 HP, 480-volt, 3 Phase Induction type squirrel cage motor with nameplate FLI of 26.5 amps?

4. 
For a one-family dwelling with a 200 ampere, 120/240-volt, single-phase main service panel, supplied with size 2/0 AWG THW copper ungrounded service-entrance conductors in rigid metal conduit (RMC), what is the minimum allowed size of bonding jumper for the service-entrance conduit?

5. 
With 15-kW or less on portable generators manufactured before __________ , listed cord sets or adapters incorporating listed GFCI protection are allowed to be used to meet the GFCI requirement.

6. 
What is the minimum size THW copper branch-circuit conductor required by the NEC for a 3-phase, continuous-duty, ac motor drawing 70 amperes for phase, when all terminations are rated for 75° C?

7. 
Lighting and trolley busway must be installed __________ ft. or more above the floor or working platform, unless a cover is provided that is identified for the purpose.

8. 
Electrical nonmetallic tubing (ENT) shall be securely fastened in place within __________ of each cabinet, device box, fitting, junction box, or outlet box where it terminates.

9. 
What is the minimum size for a copper grounding electrode conductor attached to the concrete-encased steel reinforcing bars used as a grounding electrode, when the ungrounded service-entrance conductors for a residence are size 3/0 AWG copper conductors?

10. 
What is the demand factor applied in calculating feeder or service conductor load for a commercial kitchen having four electrical ovens?

11. 
What is the minimum allowable trade size intermediate metal conduit (IMC) required to contain a total of ten (10) copper THW conductors in a 20 foot run, five (5) size 1 AWG and five (5) size 3 AWG?

12. 
A test of the complete legally required standby system when installed must be conducted and witnessed by the __________.

13. 
The minimum required size 75° C rated copper conductors for a demand load of 200 amperes when installed in an area with an expected ambient temperature of 120° F is __________.

14. 
Which insulation gives conductors a greater ampacity when used in a dry location rather than a wet location?

15. 
If a pole is over 8 ft. in height, a __________ terminal must be accessible from a handhole.

16. 
Conductors, based on the __________°C temperature rating and ampacity as given in Table 310.60(C)(67) through Table 310.60(C)(86), may be terminated unless otherwise identified.

17. 
For equipment rated 1200 amperes or more and over 6 feet wide that contain overcurrent devices, there shall be one entrance to and egress from the required working space not less than __________ inches wide and __________ feet high at each end of the working space.

18. 
For required disconnecting means for a fluorescent luminaire, which of the following statements is true?

19. 
Except for __________ all 120-volt, single phase, 15-and 20-ampere branch circuits supplying outlets installed in dwelling units shall be protected by a listed arc-fault circuit interrupter, combination type installed to provide protection of the branch circuit.

20. 
Where a cable or raceway type wiring method is installed through bored holes in joist, rafters, or wood members, in both concealed and exposed locations, holes must be bored so that the edge of the hole is __________ in. or more from the nearest edge of the wood member. Where the distance is not possible, the cable or raceway must be protected from penetration by nails or screws by use of a steel bushing or plate, __________ in thick or more, and of the correct length and width installed to cover the area where the wiring is located.