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4th Year Electrical > IP Prep > Flashcards

IP Prep Flashcards

1
Q

What does an NPN transistor consist of?

A

Two cathodes and one anode

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2
Q

What is the minimum clearance distance that must be behind the rungs of a vertical ladder used to gain access to the working platform of a scaffold?

A

0.15M (6 in.)

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3
Q

What test should be performed after the installation of a stress cone on a high-voltage conductor termination?

A

High pot test

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4
Q

In a DC motor, what are interpoles used to correct?

A

Excessive sparking at the brushes

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5
Q

How many sprinkler system flow switches can be put on one fire alarm panel zone?

A

One

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6
Q

Which code prescribes requirements for the removal of abandoned communication cables in a lay-in tile ceiling used as a plenum space?

A

National fire code of Canada

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7
Q

What type of timing contact does the symbol represent?

A

NC/TC

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8
Q

Where is electrical equipment required to be seismically restrained?

A

Where required by local authorities having jurisdiction

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9
Q

In a transition from conventional wiring to a flat conductor cable, what is the maximum length that CFC cable can be run as an extension of the conventional wiring system to serve areas or zones?
A. 5 m
B. 10 m
C. 15 m
D. 20 m

A

15 m

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10
Q

What is the most common type of connector used for Power over Ethernet (PoE) switches in building automation systems?
A. RJ45
B. DB15
C. SC
D. F-Type coax

A

RJ45

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11
Q

Whoch government body mist be complied with if a fire wall is pierced by an electrical cable or raceway to prevent fire spread?
A. Canadian electrical code of Canada
B. National building code of Canada
C. National plumbing code of Canada
D. None of the above

A

National building code of Canada

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12
Q

What is the maximum ampacity rating of a two wire conductor designated #14 AWG NMD90 if connected to a piece of equipment without a marked termination temperature?
A. 12 amps
B. 25 amps
C. 20 amps
D. 15 amps

A

25 amps

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13
Q

For the purpose of determining voltage drop in an installation, what is the demand load of a branch circuit when the connected load is unknown?
A. The connected load
B. 80% of the connected load
C. 75% of the connected load
D. 100% of the overcurrent protection device

A

The connected load

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14
Q

One of the objectives of grounding and bonding is to limit AC circuit voltages-to-ground to ________ or less on circuits supplying interior wiring systems.
A. 115 volts
B. 120 volts
C. 150 volts
D. 240 volts

A

150 volts

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15
Q

What symbol is this?

A

Products that can damage the ozone layer

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16
Q

What symbol is this?
What hazard class?

A

Acute toxicity-oral, dermal, inhalation
Class D1

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17
Q

What symbol is this?
What hazard class?

A

Gas under pressure
Class A

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18
Q

What symbol is this?
What hazard class?

A

Oxidizing liquids, gases, solids
Class C

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19
Q

What symbol is this?
What hazard class?

A

Flammables
Class B1 to B6

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20
Q

What symbol is this?
What hazard class?

A

Skin/eye corrosion. Corrosive to metals
Class E

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21
Q

What are the journeyman ratios?

A

4:1 when main service is 200A or less
2:1 when main service is greater than 200A

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22
Q

What tool is used to tighten a split bolt?

A

Adjustable wrench

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23
Q

Where could you find motor FLA of a DC motor?

A

Table D2

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24
Q

What is located in table B18-6?

A

Ingress protection

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25
Q

2000W load, what size breaker if rated continuous?

A

2000\120= 16.6A
16.6A\0.8 = 20.8A——> 25A breaker
80% RATED BREAKER

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26
Q

What type of circuit for power over ethernet (PoE)?

A

Likely class 2

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27
Q

What systems would you not install with an energy management system?

A

Nothing life safety, not a fridge etc…

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28
Q

Neutral bus in a 3 phase system is bent. Why?

A

Harmonics

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29
Q

How is rigid metal conduit bonded when terminating to a box?

A

Two lockrings. One on the outside, one on the inside

30
Q

What DC motor will ‘run away’ if no load is connected?

A

DC series motor

31
Q

Where does solar breaker go in a panel?

A

As far away from the main as possible

32
Q

Where to find expansions of pvc, aluminum conduit etc…?

A

Section 12–> appendix B
Table B12-2

33
Q

Crane signals

34
Q

How far should sills be extended beyond scaffold?

A

610mm (2ft.) and be long enough to extend under at least two scaffold feet

35
Q

What type of screws should a scaffold be installed with? Why?

A

Jackscrews
They allow for minor adjustments to help keep the scaffold plum and level

36
Q

How high should a scaffold top rail be above the platform?

A

1m (40in.)

37
Q

What is the maximum ratio between scaffold height to base width?

A

3:1, unless the scaffold is:
Tied into a structure
Stabilized by guy wires
Secured by outriggers or stabilizers to maintain the ratio

38
Q

How far must an extension ladder be extended past the landing platform?

39
Q

At what height must you be tied off when working on a portable ladder?

A

3m (10ft.)

40
Q

What is considered “hot work”?

A

Working with ignition sources near flammable materials

41
Q

What does section 2 cover?

A

General rules

42
Q

What does section 4 cover?

A

Conductors

43
Q

What does section 6 cover?

A

Services and service equipment

44
Q

What does section 10 cover?

A

Grounding and bonding

45
Q

What does section 12 cover?

A

Wiring methods

46
Q

What does section 14 cover?

A

Protection and control

47
Q

What does section 16 cover?

A

Class 1 and class 2 circuits

48
Q

What does section 26 cover?

A

Installation of electrical equipment

49
Q

What does section 28 cover?

A

Motors and generators

50
Q

What does section 30 cover?

A

Installation of lighting equipment

51
Q

What does section 38 cover?

A

Elevators, dumbwaiters, escalators, etc.

52
Q

What does section 46 cover?

A

Emergency power supply, exit signs, etc.

53
Q

What does section 62 cover?

A

Fixed electric heating systems

54
Q

What does table 13 cover?

A

Rating or setting of overcurrent devices protecting conductors

55
Q

What does table 23 cover?

A

Number of insulated conductors in boxes

56
Q

What does table 27 cover?

A

Determining conductor sizes for motors for different requirements of service

57
Q

What does table 36A cover?

A

Maximum allowable ampacity for aluminum conductor neutral supported cables

58
Q

What does table 44 cover?

A

Three phase AC motors

59
Q

What does table 53 cover?

A

Minimum cover requirements for direct buried cables or insulated conductors in raceways

60
Q

AND gate truth statement

A

Any low gives a low
A•B=Y

61
Q

OR gate truth statement

A

Any high gives a high
A+B=Y

62
Q

NAND gate truth statement

A

Any low gives a high
—-
A•B=Y

63
Q

NOR gate truth statement

A

Any high gives a low
——
A+B=Y

64
Q

What gate is this?

65
Q

What gate is this?

66
Q

What gate is this?

67
Q

What gate is this?

68
Q

What characteristics will a shunt field winding have?

A

High resistance, many turns

69
Q

What is the purpose of a shading coil in a magnetic switch?

A

Reduce chattering

70
Q

An AC three phase induction motor is required to have dynamic braking. How would this be done?

A

Applying DC current to the stator winding

71
Q

Which code prescribes requirements for the removal of abandoned communication cables in a lay in tile ceiling used as a plenum space?

A

National fire code of canada

72
Q

A resistor connected to the slip rings shorts out on a wound rotor motor that is running at full speed. What will happen to the motor?

A

Motor will run like an induction motor

4th Year Electrical (8 decks)

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