Etcp Electrical

Front 1

Cable Pick

Back 1

Length = A + B - C

Front 2

Passive Load

Back 2

A load in which the resistance doesn't change if the applied voltage changes.

Front 3

Active Load

Back 3

A load in which the power consumed doesn't change if the applied voltage changes.

Front 4

Servicing Chain

Motor

Back 4

Check Voltage

to Coil

Front 5

Device for testing

the effectiveness of insulation

Back 5

Meg-ohm meter (commonly called a megger)

Front 6

Cold Filament

Back 6

Low Resistance

Large In-Rush Current

Front 7

Half the Voltage at

the same Resistance

Back 7

Draws 1/2 the Current

Front 8

Power =

Back 8

Voltage2 / Resistance (voltage square divided by resistance)

Front 9

Apprent Power =

Back 9

Voltage x Current

Front 10

Dip Switch Settings

1 thru 9

Back 10

1-2-4-8-16-32-64-128-256

Front 11

Assignment of Dimmers

to virtual control channel

Back 11

Soft Patch

Front 12

DMX-512 is an ___ bit

Protocol

Back 12

8-bit

Front 13

DMX- 512 Operates at

__________ Kbytes per sec

Back 13

DMX@ 250Kbytes

Per sec

Front 14

DMX can control _______

dimmers per channel

in ________ steps per device

Back 14

512 - 256

Front 15

Maximum Allowable

Voltage Drop on

Feeders or Branch Circuits

Back 15

3%

Front 16

Maximum Total

Allowable Voltage Drop

on Both

Feeder and Branch Circuits

Back 16

5%

Front 17

In the case of Capacitive Loads

current_______ the Voltage

Back 17

Leads

Front 18

In the case of Resistive Loads

current is_______with the Voltage

Back 18

In phase

Front 19

In an Inductive Load

the current ________ the Voltage

Back 19

Lags

Front 20

Power Factor =

Back 20

cos (phase angle between voltage and current)

Front 21

Power Factor of 1

is a______load

Back 21

Resistive

Front 22

Single Phase

kVA

(formula)

Back 22

kVA = (Iphase x Vphase )

1000

Front 23

Three Phase

kVA

(formula)

Back 23

kVA = (ILine x VLine x 1.732)

1000

Front 24

What does an Extension Cord

extend?

Back 24

It extends the electrical outlet

to the power supply cord

Front 25

Power (Watts) =

Back 25

V x I

Front 26

Power is

Back 26

The rate of doing work

Front 27

What must be on

Lock-out Devices

Back 27

1 - Identity of employee applying device

2 - the Date the device was applied

3 - a legend that says:

"Do Not Energize"

Front 28

An Opto-Splitter can

protect a lighting system

from_____on the DMX Cable

Back 28

Over Voltage

Front 29

A Bull/Company Switch

allows an Electrician to

Back 29

Disconnect Power

from a System

Front 30

At one venue the Chain Motors

worked properly with 100' of cable run.

At next venue a cable run was 300'

and the motors became intermittent.

Why?

Back 30

Longer cable run

caused a Voltage drop

Front 31

On single purchase

counter-weight battens,

what is the First action

an Electrician should take?

Back 31

Attach all fixtures

before loading

counter-weights

Front 32

Best Material for temporarily hanging 15 Luminares on ___?

Back 32

schedule 40

iron pipe

Front 33

Best location to ground

a portable power generator providing supplementary power to a building for a show?

Back 33

at house

service entry (where power enters building) or service panel

Front 34

Minimum Voltage

allowable on a

120v branch circuit?

Back 34

116.4

(3%)

Front 35

For low hanging Fog effect

a technician would use

________

Back 35

Dry Ice

Front 36

If two control devices are connected

on an Ethernet switch

but can't communicate

Back 36

The IP address

settings are incorrect (should have the same network portion)

Front 37

Live work is only permitted under NFPA 70E (Standard for Electrical Safety in the Workplace) if...

Back 37

1- locking out all sources of Energy is Not possible

2- de-energizing a circuit will introduce a greater hazard (e.g., life support system)

Front 38

8 LED fixtures are separatley controlled

by a lighting console but currently

units #2 & #7 are operating in unison.

What's most practical

troubleshooting step?

Back 38

Verify that the DMX address of each unit

is unique.

Front 39

An incoming road board requires 300A

of 3-phase ,

how best to assure for a

successful load-in?

Back 39

Locate a company switch

fed by a transformer capable

of delivering the required 300a

Front 40

When a 3phase motor runs incorrectly

in reverse rotation

you should..

Back 40

Swap two of the

phase connections

Front 41

The best method for definitively determining

the ampacity of a

power panel is

Back 41

Check ampacity indicated on Breaker

feeding the Company Switch

Front 42

10.0.0.1 is a ______

Back 42

Valid IP address

Front 43

Flame Resistant long Sleeve Shirt,

Flame Resistant Pants,

and Saftey Glasses

Back 43

Personal Equipment required

when working on 240v equipment

where available fault

current is unknown

Front 44

Connection that returns

fault current

to the source

Back 44

Make First

Break Last

Front 45

When installation of tails

are required at Company panel

this is the safest way to proceed

Back 45

Lock-out/Tag-out the breaker

feeding the panel serving

as the Company switch

Front 46

Regarding OSHA/OHSA compliance

for the entertainment electrician

______is a concern

Back 46

Personel Protection

Equipment

Front 47

Most Common service

found at a Company switch

in North America is?

Back 47

120/208v

3-phase

Front 48

On a twist lock connector

the __________ connects

first when mating

Back 48

Ground

Front 49

A Rig of 208V HMI fixtures are on branch circuit breakers from distribution panel.

The breakers are within rated use for the current load but are extremly Hot,

most likely from?

Back 49

Harmonics

Front 50

Best diagnostic tool

for working with

SCR dimmer system

is a ______

Back 50

True RMS Digital Meter

Front 51

DMX "Slot to channel"

best describes _______

Back 51

the function

of a Soft patch

on a console

Front 52

Most Chain motors designed

for use in North America

operate correctly

on___________ voltages

Back 52

120/208v

Front 53

The best reason

to power up a large Rig

in sections is?

Back 53

The intial power surge

can overload power sources

Front 54

The best way

to deal with a non-sinusoidal load

is to use a _________

Back 54

Transformer

with a High K-rating or an HMT

Front 55

A follow spot puts out 100fc @200 ft

with a 40ft beam size.

What is the beam size

and foot candles at 100'

Back 55

20 ft and 400fc

1/2 the size

4x times the intensity

Front 56

When metering the load side

of a transformer

supplying 120/208v 3-phase

what is the minimum category meter

to be used?

Back 56

Category III

Front 57

To assemble a

Cat 5 data cable

use a _________ tool

Back 57

RJ-45 crimp tool,

jacket stripper,

cable shears

Front 58

If a lighting designer asks you to "Flag" a light what do you do?

Back 58

Wave an hand in front of Luminaire

Front 59

VRMS =

Back 59

Vpeak x 0.707

Front 60

Vpeak =

Back 60

V

Front 61

Phase angle of 0 degrees =

Back 61

PF of 1

Front 62

Phase angle of 90 degrees =

Back 62

PF of 0

Front 63

Loss of power

due to resistance

is known as

Back 63

I2R

Front 64

Lost power is proportional

to the _________ in the circuit

Back 64

Resistance

Front 65

Lost power is proportional

to the________ of the_________

of the current

flowing thru the circuit

Back 65

Square of the Current

Front 66

AED UNIT will....

Back 66

not schock

if heartbeat is detected

Front 67

MBJ

SBJ

Back 67

MainBonding

Jumper

Secondary Bonding

Jumper

Front 68

Chain Motor

is a

_________ load

Back 68

Linear

Front 69

maximum %

of phase current found thru neutral

Back 69

173%

Front 70

The average value of a fully rectified sinewave

is __________ of peak

Back 70

62%

Front 71

Electricity takes________________

to return to source

Back 71

as many paths

available to it

Front 72

K - Factor

Back 72

Rating of how well

transformers can handle loads

current in the neutral conductor

Front 73

Use a _______ type

fire extinguisher

on electrical fires.

Back 73

Type C

extinguisher

Front 74

NEC Code for:

- Stage

- Carnivals

- Motion Picture

Back 74

stage - 520

carnivals - 525

Motion Picture - 530

Front 75

LED's are inherently

___________ loads

Back 75

Capacitive

Front 76

Inductive loads have

___________ fields

Back 76

electromagnetic

Front 77

Capacitive loads have

_____________ fields

Back 77

electrostatic

Front 78

An Inductor is to current what a

___________ is to water.

Back 78

Paddle wheel

Front 79

RMS voltage =

Back 79

.707 of peak

Front 80

Hots can be

referred to as

Back 80

Ungrounded

conducters, phase conductors, live conductors

Front 81

Neutrals can be

referred to as

Back 81

The grounded conductor;

a normally current-carrying conductor

Front 82

If fall protection

has been used it

Back 82

must be taken out of service

Front 83

HRC

Back 83

High Rupture

Capacity Fuses

Front 84

The rule for Lightning

is called the

Back 84

30/30 rule (if you hear thunder within 30 seconds of lightning, shut down outdoor generator and wait 30 minutes after last lightning strike to re-start)

Front 85

Maximum units on

multi-point bus

(daisy chain)

Back 85

32 Units

Front 86

Maximum length of

ethernet cable is

Back 86

100 meters/328 ft.

Front 87

RMD

Back 87

Remote device management

Front 88

DMX to Ethernet/

Ethernet to DMX

connectors

Back 88

Gateway or Protocol

converter

Front 89

P.O.E.

Back 89

Power over ethernet

allows 48vdc over

2 - unused wires

Front 90

A isolated ground 120v outlet,

used in conjuction with an isolation transformer has a ________

Back 90

Orange triangle

on its face

Front 91

DMX cable must be

Back 91

Twisted pair, low capacitance, and 120-ohm characteristic impedance

Front 92

NEC. Rule which allows

an over-current device

to be located 25 feet

after a change in cable size.

Back 92

25 foot Tap Rule

(sec.520-69)

Front 93

3-phase AC power per leg

formula

Back 93

KVA / V x 1.732

3

Front 94

Peak Voltage

formula

Back 94

Vpeak = Vrms/1.414

Front 95

RMS Voltage

formula

Back 95

Vrms = Vpeak x 0.7071

Front 96

Power Factor

formulas

Back 96

1- PF = cosine(phase angle)

2- PF = Power(watts)/(V x I )

3- PF = Real Power(watts)

Apparent Power(VA)

Front 97

Single Phase AC power

formula

Back 97

P(watts) = V x I x PF

Front 98

What is considered to be the maximum allowable cable length for a DMX Cable?

Back 98

1000 meters

or 3281'

Front 99

An Arc Flash Can reach as much as _____________degrees F.

Back 99

20,000º

Front 100

Copper expands at what rate when vaporized in an Arc Flash?

Back 100

67,000X

Front 101

How much pressure can be created by an Arc Blast?

Back 101

Hundreds or possibly Thousands of Pounds per Sq. Ft.

Front 102

Possible sound pressure during an Arc Blast

Back 102

160 db or greater

Front 103

At what speed is molten metal, schrapnel, and other material ejected during an Arc Blast?

Back 103

Can exceed 700 mph

Front 104

What is the appropriate hard hat to wear near high voltage live work?

Back 104

G-Rated, with a non=melting headliner

Front 105

What is the proper footwear when working with high voltage?

Back 105

Shoes rated EH for Electrical Hazard

Front 106

What type of dimmer is forward phase?

Back 106

SCR/ Triac= Silicone Controlled Rectifier

Turns the current on in the middle of the sine wave. Requires choke.

Proportional "on" time to "off" time determines dimming.

Front 107

What type of dimmer is reverse phase?

Back 107

IGBT= Insulated Gate Bi-Polar Transistor

Turns the current off in the middle of the sine wave. Requires no choke.

Proportional "off" time to "on" time determines dimming.

Front 108

The most common types of dimming are

Back 108

Conventional or Forward Phase (SCR/Triac)

Reverse Phase (IGBT)

Sinewave Dimming/ High Freq. Sinewave Dimming

Pulse Width Modulation

Front 109

What are the common forms of Lockout/Tagout?

Back 109

Simple and Complex