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4th Year > 4th Year Final > Flashcards

4th Year Final Flashcards

1
Q

Name two main functions of control devices in electrical sustenance

A
  1. Monitoring and maintain the quality of the power

2. switching electrical loads

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2
Q

What three conditions will require shutdown of the supply air fan?

A
  1. Signal from fire alarm control panel to shutdown
  2. Close isolation damper
  3. Reaching low temperature limit
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3
Q

What type of control system uses only one controller to run all system logic?

A

DDC Control

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4
Q

What condition aids in keeping contagion from entering an isolation room?

A

Positive relative pressure

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5
Q

____time is the time it takes a programmable controller to make a sweep of the program.

A

Scan

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6
Q

The output module sends a signal to a control field device, the power needed to energize the field device is provided by____.

A

Separate power source

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7
Q

The current output of a solar cell depends on_____.

A

Temperature
Irradiance
Operating voltage

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8
Q

Which effects size and cost of any standalone photovoltaic system?

A

Load energy consumption

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9
Q

Solar___is the total amount ofsolar energy accumulated on area over time.

A

Irradiation

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10
Q

When reading PLC ladder logic,a good rule to adhere to is “follow the current flow.”

True or False

A

False

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11
Q

PLCs are___designed for use in the control of a wide variety o fmanufacturing machines and systems.

A

Special purpose industrial computers

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12
Q

Actuated by a separate electrical circuit…

A

Relay

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13
Q

In PLC programming, the term “force”refers to….

A

Overriding a program input value by using the PLCs software

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14
Q

A solar irradiance level of 1000W/m2 is commonly associated with____.

A

Module output ratings

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15
Q

Wallwasher luminaries are said to have ____form of light distribution.

A

Asymmetric

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16
Q

A light emitted from a metal object heated to the point of incandescent, best describes____light operation.

A

Halogen

17
Q

Two major principles to controlling lighting systems. Controlling___and controlling____.

A

Power, time

18
Q

What are two broad categories that HID and fluorescent ballasts fall into?

A

Magnetic and electronic

19
Q

3 fluorescent lamp starting techniques?

A

Rapid start
Instant start
Programmed rapid start

20
Q

Four main considerations or concepts to apply to lighting technology

A
  1. Matching lights to the application or area
  2. Color characteristics of the lighting
  3. Energy savings and the power supplied/ required
21
Q

Electronic ballast that provides precise heating of lamp filaments and tightly controls the preheat duration…

A

Programmed start ballast

22
Q

Single pin contacts, no filament heating to ignite…

A

Slimline lamp

23
Q

Which type of HID lamp operates more like a fluorescent lamp?

A

Low pressure sodium

24
Q

Mercury vapor includes an internal____within the arc tube.

A

Probe

25
Q

What are two measures of the quality of white light

A

1 Color rendering index

2 correlated color temperature

26
Q

Ability of magnet to retain magnetism

A

Retentivety

27
Q

Requires phase shift to start…

A

Single phase motor

28
Q

What are the fourpossibilities of using advanced micro processor based electronic ballasts in a building lighting system?

A

Daylight harvesting
Load shedding
Automatic lighting control
Programmable scene lighting

29
Q

What are the three basic tasks of a ballast in a fluorescent lighting system?

A

Producing the appropriate starting voltage

Limit the current

30
Q

If the frequency is increased in an RC circuit, the resistance will _____.

A

Remain the same

31
Q

In a purely inductive circuit, the current____the supplied voltage by 90 degrees.

A

Lags

32
Q

3 elements required for induction to exist

A

Conductor
Magnetic field
Relative motion

33
Q

You run the risk of losing your IBEW membership if you owe more than____months of dues.

A

6

34
Q

The single most important thing you can do to stay safe is to_____.

A

Be aware

35
Q

The inductor always opposes a change in_____.

A

Current

36
Q

List 5 things that determine the amount of harm from electrical shock?

A 
Frequency
Amperage
Length of time
Position on the body
Environment

4th Year (13 decks)

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