Michigan Practice Exam 2017

Question 1

There are 6 conductors in a raceway connected to 75 degree C rated circuit breaker. Each wire has a 70 amp load using THHN. The minimum size conductors used are ________ AWG.

Answer 1

4 AWG

310.15(B)(16), 310.15(B)(3)(a)

Question 2

Thermal insulation shall not be installed within ________ inches of recessed lighting fixtures.

Answer 2

3 inches

410.116(B)

Question 3

A 1” conduit contains three 3-wire circuits or a phase system. All conductors are #10TW. Each circuit consists of two-phase conductors and one grounded conductor and one equipment grounding conductor. The max ampacity of each phase conductor is _____________?

Answer 3

24 amps

Question 4

The volt/ampere rating of a device that consumes 14.5 amperes on a 240 circuit is _________?

Answer 4

3,480

VOLTS X AMPERE = VA

Question 5

A 208 volt, 3 phase heater draws 3,598 watts. How many amperes does the heater draw?

Answer 5

10 Amps

P=Ex1.73/I
3598=208x1.73/I
I=3598/359.84

Question 6

A pool underwater light fixture shall be installed at least _________ inches below the water level?

Answer 6

18 inches

680.23(A)(5)

Question 7

A pools general-purpose receptacle shall not be installed less than ________ feet from inside wall of the pool.

Answer 7

6 feet

680.22(A)(1)

Question 8

The junction box for the 120 volt wet-niche fixture shall be at least?

Answer 8

4 inches

680.24(A)(2)(a)

Question 9

A metal fence installed with-in _______ feet of the pool shall be bonded.

Answer 9

5 feet
680.26(B)(7)

Question 10

The feed to the wet-niche fixture shall be installed in _________ if installed in metal conduit.

Answer 10

Brass
680.23(B)(2)

Question 11

A 15 or 20 amp receptacle shall be located with-in ________ feet of a roof top air conditioner?

Answer 11

25 feet, on the same level
210.63

Question 12

The maximum over current protection for 8 current carrying #12 THHN conductors in a 1/2”EMTconduit is ________ amps.

Answer 12

20 amps

Question 13

An AC system of 50 to 1,000 volts shall be grounded if maximum voltage to ground does not exceed _______ volts.

Answer 13

150 Volts
250.20(B)(1)

Question 14

Type “S” adapters are installed in Edison base fuse holders to _________.

Answer 14

To limit the size of the fuse installed.
240.53(B)

Question 15

A laundry branch circuit shall be rated at ________ amps.

Answer 15

20 amps
210.11(c)(2)

Question 16

In a commercial building the minimum size ungrounded service entrance conductor for 120/240 volt 1 phase 200 amp service is __________.

Answer 16

3/0
310.15(B)(2)(a)

Question 17

The minimum service for a one family dwelling shall be ___________.

Answer 17

100 amps
230.79(C)

Question 18

Type _______ cable is not permitted for service entrance conductors.

Answer 18

UF
340.12(a)

Question 19

A motor rated 4750 watts, 208 volt 3 phase draws _______ amps.

Answer 19

13.2amps
I=P/Ex1.73

Question 20

Direct burial cables emerging from the ground and subject to physical damage shall be installed in

Answer 20

Schedule 80 PVC
300.5(D)(1-4)

Question 21

A high impedance grounded system is limited to systems operating as ______ volts or above.

Answer 21

480 volts
250.36

Question 22

An expansion joint is required for nonmetallic conduit when the temperature changes from r -15 degree to 105 degree Fahrenheit, the thermal expansion for 100 feet or rigid nonmetallic conduit is ________ inches.

Answer 22

4.87 inches
Table 352.44
under 120 degree difference

Question 23

The voltage rating of communication cables shall not be less then _______ volts.

Answer 23

300 volts
800.179

Question 24

The direction of rotation of a 3 phase motor can be reversed by interchanging any ______ lead.

Answer 24

2 leads.

Question 25

A _______ receptacle may be included on the small appliance branch circuit.

Answer 25

Electric clock or lighting on a gas range 210.52(B)(2) Exp 1 & 2

Question 26

A light fixture that weights more than _______ pounds shall be supported independently of the fixture junction box.

Answer 26

50 lbs 314.27 (A)(2)

Question 27

Disconnecting means shall be provide on the supply side of all cartridge fuses of any voltage where?

Answer 27

Accessible to other than qualified persons 240.40

Question 28

Furnaces shall be supplied by a _______ branch circuit.

Answer 28

Individual 422.12

Question 29

A screw connecting the neutral bar or a grounded system to the service equipment enclosure is called _______

Answer 29

Main bonding jumper 250.28(B)

Question 30

The minimum size rigid metal conduit for a commercial service rated for 150 amps 120/240 volt 3-wire single phase, using THWN wire is ______?

Answer 30

1.5 Chapter 9 tables 4 and 5

Question 31

Round boxes shall not be used where conduits or connectors fasten to the _______ of the box.