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Electrotechnology Cert II > Electrical > Flashcards

Electrical Flashcards

1
Q

What is reactance ?

A

It opposes the change in current and causes the current to be out of phase with the voltage.

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2
Q

List 2 types of reactance

A
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3
Q

How does capacitive reactance work ? ( DC )

A
  • Current rush out when first closed
  • Current build up , starts to oppose/ impede the force (Voltage)
  • leading current
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4
Q

What happens to capacitive reactance in low and high frequency ?

A
  • low frequency - capacitors have time to charge - push back more - more reactance
  • high frequency - no time to charge - less reactance
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5
Q

What is the capacitive reactance formula ?

A
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6
Q

What happens in inductive reactance ? (DC)

A
  • when circuit is closed, inductor starts to create a magnetic field.
  • the magnetic field doest want to change so oppose
  • eventually it’s overcome by the voltage, magnetic field forms, current flow easily
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7
Q

What happens to inductive reactance in low and high frequencies ?

A
  • low frequency - lower reactance
  • high frequency - higher reactance
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8
Q

What is the formula for inductive reactance ?

A
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9
Q

What is the phase angle for capacitive reactance ?

A
  • -90° phase angle
  • bcz when circuit close, current rush out
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10
Q

What is the phase angle for capacitive reactance ?

A
  • -90° phase angle
  • bcz when circuit close, current rush out
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11
Q

What is the impedance formula in a series circuit ?

A
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12
Q

Phase angle can be found using the …. ?

A

Impedance triangle

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13
Q

What is Hazchem code ?

A
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14
Q

Name the following dangerous goods.

A
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15
Q

What is SDS ?

A
  • A Safety Data Sheet (SDS) is an informative document detailing the safety information for a given material.
  • Contains ff sections

Identification of Substance / Preparation / Company
Composition / Information on Ingredients
Hazard Identification
First Aid Measures
Firefighting Measures
Accidental Release Measures
Handling and Storage
Exposure Controls / Personal Protection
Physical and Chemical Properties
Stability and Reactivity
Toxicology Information
Ecological Information
Disposal Considerations
Transport Information
Regulatory Information

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16
Q

What is the recommended ratio for using an extension ladder ?

A
  • 4:1
17
Q

What are the first aid procedures ?

A
18
Q

Define Hazard, Risk and Control measures.

A
  • Risk is the likelihood of the hazard causing harm and the severity of the potential harm.
19
Q

List the ff workplace safety signs.

A
20
Q

What are the required mounting heights for fire extinguishers ?

A
21
Q

State the procedure for using a portable fire extinguisher.

A

PASS acronym

Pull out the safety pin
Aim the nozzle at the base of the fire
Squeeze the trigger
Sweep from side to side

22
Q

Fill in the blanks

A

Electrotechnology Cert II (9 decks)

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