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PEC 11 - 15 > PEC 11 > Flashcards

PEC 11 Flashcards

1
Q

A convenience outlet circuit consisting of 8 outlets connected across a 220-V supply considering 180W per outlet, what is the maximum circuit current?

A

6.54 A

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2
Q

Plug fuses and fuse holders shall NOT be installed or such in circuit’s exceeding ____ between conductors.

A

250 V

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3
Q

The standard length of rigid metal conduit is

A

10 feet

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4
Q

For warehouse, the feeder demand load for the general lighting and small appliance load for the first 12,500VA or less is 100%, while the remainder over 12,500VA is charged at ____.

A

70%

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5
Q

Liquid tight flexible non-metallic conduit shall NOT be used in lengths longer than

A

1,800 mm

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6
Q

Line and ground connecting conductors to surge arresters shall NOT be smaller than ______ copper or ______ aluminum.

A

2.0 mm², 3.5 mm²

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7
Q

Electrical metallic tubing shall be securely fastened in place at least every______.

A

3,000 mm

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8
Q

For the purpose of lighting protection, class I ordinary building is one that is at less than_____ in height.

A

23 m

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9
Q

For dwelling units, the demand factor for the first 3000 voltamperes of load is

A

100%

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10
Q

Ventilating pipes for motors, generators or other rotating electric machinery or for enclosures for electric equipment shall be of metal NOT less than _____ in thickness.

A

0.50 mm

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11
Q

Direct burial cables or conductors with nominal voltage of 600V or less and passes under streets, hi-way, roads, alleys, driveways and parking lots shall have a minimum cover distance of ____

A

600 mm

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12
Q

A factor assembly of parallel conductors formed integrally with an insulating _____ material web specifically designed for field installation in metal surface raceway.

A

type FC

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13
Q

Snap switches shall not be grouped or ganged in enclosures unless they can be so arranged that the voltage between adjacent switches does not exceed ____.

A

300 V

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14
Q

Wiring located above heated ceilings shall be spaced not less than ____ above the heated ceiling and shall be considered as operating at an ambient of 50°C.

A

50 mm

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15
Q

Are rectangular sheet metal enclosures equipped with removable covers providing access to conductors inside

A

Wireways

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16
Q

Each unit length of heating cable shall have a permanent legible marking of each non-heating lead located within ____ of the terminal end.

A

75 mm

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17
Q

Metal faceplates of receptacles shall be of ferrous metal not less than ____ in thickness or of non-ferrous metal not less than ____ in thickness.

A

0.76 mm, 1.0 mm

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18
Q

Surface mounted incandescent fixture shall be permitted to be installed in clothes closets provided there is a minimum clearance of _____ between the fixture and the nearest point of the storage area.

A

300 mm

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19
Q

Thermal insulation shall not be installed within _____ of the recessed fixture enclosure.

A

38 mm

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20
Q

Lighting track load shall NOT be installed where less than _____ above the finished floor EXCEPT where protected from physical damage.

A

1,500 mm

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21
Q

Where circuit breakers are used to protect the primary side of a transformer over 600 V nominal, their continuous current rating shall NOT exceed _____ of the rated primary current.

A

300%

22
Q

The lowest standard size of disconnect is ______.

A

30 A

23
Q

The primary winding of the step down transformer shall be protected on the primary side by an overcurrent device rated NOT more than a certain percentage of the primary current. Which is this percentage?

A

125%

24
Q

For a two wire FCC cable system with grounding, the grounding conductor shall be _____ conductor.

A

the middle

25
Q

Where passing through wood cross members in plastered partitions, conductors in concealed knob and tube wiring shall be protected by insulating tubes extending NOT less than _____ beyond the wood member.

A

76 mm

26
Q

Branch circuit conductors supplying a single motor shall have an ampacity NOT less than _____ percent of the motor full load current rating.

A

125

27
Q

In indoor wet locations, the entire wiring system including all boxes, fittings, control boards and panelboards shall be installed on walls with a minimum clearance. What is the clearance?

A

10 mm

28
Q

Type NM cable shall NOT be installed ______.

A. where exposed to corrosive material

B. where embedded in concrete

C. in a shallow chase in masonry, concrete or adobe

D. all of these

A

D. all of these

29
Q

Dry type transformers installed indoors and rated 112.5 kVA or less shall have a separation of at least ____ from combustible material.

A

300 mm

30
Q

A factory assembly of two or more insulated conductors in an extruded core of moisture resistant, flame retardant, non-metallic material covered with an overlapping spiral metal tape and wire shield and sunlight resistant nonmetallic material.

A

type SNM cable

31
Q

To cut rigid metal conduits, an electrician should do one of the following. Which one is this?

A. Order it cut to size from the supplier

B. Use a three-wheel pipe cutter

C. Use a cold chisel and ream the ends

D. Use a hack saw and ream the ends

A

D. Use a hack saw and ream the ends

32
Q

Where the overload relay selected using the factor 125 % is not sufficient to start the motor or to carry the load, the multiplying factor shall be increased but shall NOT exceed _____ percent.

A

140

33
Q

Where the protection of a motor-compressor load is not sufficient for the start current of the motor, the rating or setting shall be increased but not more than ____ of its rated load current.

A

225%

34
Q

An insulator designed to electrically insulate the end of a type FCC cable

A

Insulating end

35
Q

Consists of three or more flat copper conductor placed edge to edge separated and enclosed within an insulating assembly

A

Flat conductor cable

36
Q

Lampholders installed in wet or damp locations shall be of the ____ type.
A. heavy-duty

B. waterproof

C. weatherproof

D. all of these

A

C. weatherproof

37
Q

The single phase conductors supplying the less phase than converter shall have an ampacity NOT ____times the full current rating of the motor or load being served.

A

2.16

38
Q

An assembly of the two insulated conductors within a nonmetallic jacket or an extruded thermoplastic covering.
A. Shielded non-metallic sheathed cable

B. Non-metallic sheathed cable

C. Non-metallic extension

D. None of these

A

Non-metallic extension

39
Q

Dry type transformers rated over ____ volts, shall be installed in vaults.

A

35,000

40
Q

In walls or ceilings of concrete tile, or other noncombustible materials, boxes and fittings shall be installed that the front edge of the box or fitting will NOT set back of the finished surface more than_____.

A

6.4 mm

41
Q

A type of cable which is a single or multi conductor solid dielectric insulated cable rated 2001 volts or higher.

A

MV

42
Q

In selecting the maximum setting of an instantaneous trip CB to be used to protect all AC motors from short circuit, a multiplying factor of ____ shall be used.

A

700%

43
Q

The paper spacer thickness if type IGS cable having a conductor size of 125 mm2 to 500 mm2 shall be______.

A

1.02 mm

44
Q

What is the maximum number of overcurrent devices of a lighting and appliance panel board that shall be installed in a cabinet?

A

48 devices

45
Q

Intermediate metal conduit shall be firmly fastened within _____ of each outlet box junction box, cabinet or fitting.

A

900 mm

46
Q

Resistance type heating elements in electric space heating equipment shall be protected at NOT more than ____.

A

60 A

47
Q

Heavy-duty lighting track is a lighting track identified for use exceeding ____.

A

20 A

48
Q

For three-phase motors supply by any 3-phase system, the number of overload units required shall be ____.
A. three, one in each phase

B. two, in any two of each phase

C. one, in any one phase

D. none of these

A

A. three, one in each phase

49
Q

As compared with solid wires, stranded wires of the same cross sectional area have the following advantage EXCEPT one. Which one is this?

A. It is larger in overall diameter

B. It is easier to skin off the insulation

C. It is better for high voltage

D. It has a higher current rating

A

B. It is easier to skin off the insulation

50
Q

Each length of the rigid metal conduit shall be clearly and durably identified in every ______ as required.

A

3,000 mm

PEC 11 - 15 (2 decks)

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