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L.E. > big one 61-80 > Flashcards

big one 61-80 Flashcards

1
Q

What is the output in KWof a 5000 KVA tramsformer feeding a load that has a PF. of 80 % is:

a. 375 KW
c. 400 KW
b. 3750 KW
d. 4000 KW

A

4000 KW

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2
Q

A 100 HP DC motor at 220 volts with 90% efficiency requires a fuse size of ?

a. 400 Amps
c. 600 Amps
b. 800 Amps
d. 550 Amps

A

600 amps

430.52

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3
Q

What is the minimum number of duplex receptacles required for each patient bed in the critical care area of a hospital ?

a. 3
c. 4
b. 6
d. 8

A

3

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4
Q

Service switches may be installed on the outside of a building only if :

a. The building is 3 stories or less in height
c. The building has only 4 dwelling units or less
b. The building has only 5 dwelling inits or less
d. None of the above

A

The building has only 4 dwelling units or less

430.70 (A)
NYC ammendment

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5
Q

The internal bonding bus of a multisection switchboard shall have a cross secional area of at least :

a. 1 Sq.Inch
c. 3/4 Sq. Inch
b. 1/2 Sq. Inch
d. 1 1/2 Sq. In

A

1/2 sq inch

408.6 (O)

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6
Q

What is the interrupting capacity of a class H fuse?

a. 5000 fuse
c. 100,000 fuse
b. 10,000 fuse
d. 200,000 fuse

A

10,000 fuse

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7
Q

What is not part of the classification of an incandescent lamp ?

a. Shape of the bulb
c. Type of service
b. Type of the base
d. The size of the bulb

A

type of the base

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8
Q

An electrician buys 100 units of armored cable connectors. He purchases them at the price of $2.10 each. He than sells them at cost of $ 3.00 per unit. Assuming his overhead is 30 % ,what is his profit. ?

a. $15.00
c. $27.00
b. $24.00
d. $70.00

A

$24.00

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9
Q

*?How many 20 amp branch circuit are required for 80 linear feet of show windows lighting space?

a. 6 Ckt.
c. 9 Ckt.
b. 7 Ckt.
d. 10 Ckt.

A

9 ckt

20 x 120 = 2400 VA

2400 x 80% CL = 1920 VA

1920 / 20 = 9.6

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10
Q

An electrician assigns men to install outlets n a room. It takes 2.6 hours to install outlets in each room. At the end of 5 days , how many rooms are completed? Assume the men work 8 hours per day.

a. 12
c. 16
b. 18
d. 15

A

15

8 / 2.6 = 3.077

3.077 x 5 = 15.385

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11
Q

Mandatory rules of the code are those that identify actions that a specifically required or prohibited and are characterized by the use of the terms:

a. Shall be permitted or shall not be required
c. may be used or may not be used
b. Shall or shall not
d. olny for information

A

shall or shall not

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12
Q

Which is not considered a power supply?

a. UPS
c. Photoboltaic
b. Fuel cell
d. Capacitor

A

capacitor

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13
Q

A 15 amp or 20 amp 125 volt receptacle outlet shalll be located within 25 feet of heating, air conditioning, and refrigeration equipment for _____________ occupancies.

a. dwelling
c. industrial
b. commercial
d. all of these

A

all of these

210.63

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14
Q

For other than dwelling occupancies, banks, or office buildings, each receptacle outlet shall be calculated at not less than______VA.

a. 90
c. 270
b. 180
d. 360

A

180

220.14 (I)

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15
Q

The minimum feeder load for show window lighting is _____per linear foot.

a. 180 VA
c. 300 VA
b. 200 VA
d. 400 VA

A

200 VA

220.43 (A)

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16
Q

On a 4 wire, delta connected, three phase system, where the midpoint of one phase winding is grounded, the conductor with the higher phase voltage to ground must be durably and permanently marked be an outer finish_______in color, or other effective means.

a. Brown
c. yellow
b. orange
d. all of these

A

orange

215.8

17
Q

The load for electric clothes dryers in a dwelling unit shall be ____watts or the nameplate rating, whichever is larger, per dryer.

a. 1500 c. 5000
b. 4500 d. 8000

A

5000

18
Q

A branch circuit that suppliesonly one utilization equipment is a _____branch circuit.

a. individual
c. isolated
b. general purpose
d. special purpose

A

individual

19
Q

The voltage of a circuit is defined be the code as the _____RMS(root means square) or effective difference of potential between any conductors of the circuit.

a. lowest c. average
b. greatest d. nominal

A

greatest

20
Q

The connection between the grounded conductor and the equipment grounding conductor at the service is accomplished be installing a

a. main bonding
c. equipment bonding
b. system bonding
d. circuit bonding

A

main bonding

L.E. (18 decks)

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