January 2000

Test your knowledge of the code, by taking E.T.E.'s code quiz.
There are 10 questions, which are multiple choice.
Based on the 1999 Code Book.


Quiz by Bob Keis

Question #1:
A motor controller for a 20 hp. Design E motor if not marked for use with a Design E motor shall have a rating of not less than ________ horsepower.
(A) 20.0
(B) 25.5
(C) 28.0
(D) 40

Question #2:
An installation of 150 feet of rigid nonmetallic conduit installed in a location where the maximum summer temperature is 105 deg F. and the winter temperature could go down to 10 deg. F. would need expansion fittings to allow for _______ inches of movement.
(A) 3.8
(C) 5.7
(D) 7.05

Question #3:
Power for a legally required standby system shall be available _________.
(A) immediately  
within 10 seconds
within 30 seconds
within 60 seconds

Question #4:
Where a conduit run passes from a nonclassified location into a Class I, Div 1 location, the only fitting permitted between the boundary and the seal fitting is a ________.
(A) explosionproof union
explosionproof coupling
explosionproof reducer
explosionproof condulet

Question #5:
What is the maximum number of 120-volt 15- or 20-amp duplex receptacles that can installed on a 20 ampere circuit in a motel unit?
(A) 10
(B) 13
(C) 15
(D) unlimited

Question #6:
1 inch Electrical Metallic Tubing (EMT) has an internal diameter of ________ inches.
(A) 1.000
(B) 1.049
(C) 1.054
(D) 1.063

Question #7:
17). A recreational vehicle park has a total of 42 sites. What is the demand factor for sizing the service conductors?
(A) 23%
(B) 42%
(C) 41%
(D) none

Question #8:
A 30 ampere circuit is run underground to a residential garage. If this circuit runs under the driveway what is the minimum burial depth permitted?
(A) 12 inches
(B) 18 inches
(C) 24 inches
(D) 30 inches

Question #9:
The ampacity of supply conductors to a resistance welder with a duty cycle of 20% and a primary current rating of 32 amperes and is wired for a specific operation is ________ amperes.
(A) 40
(B) 32
(C) 18

Question #10:
A 4" rigid metal conduit is installed under a 8" thick concrete highway. What is the minimum depth of the ditch to contain this raceway?
(A) 12 inches
(B) 16 1/2 inches
(C) 24 inches
(D) 28 1/2 inches

Thanks for taking E.T.E.'s Code quiz!

If you find any discrepancies please feel free to email E.T.E. at http://www.elec-toolbox.com/email.htm.

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This month Code quiz was brought to you by Bob Keis.

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