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Module 3 - Electrical Systems > 3.5 > Flashcards

3.5 Flashcards

1
Q

Characteristics of lead acid electrolysis

A

+ lead peroxide
- lead
Sulphuric acid and water = electrolyte
30% 70%

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2
Q

Nickel cadmium electrolysis

A

+ nickel oxyhydroxide
- metal cadmium
Potassium hydroxide = electrolyte

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3
Q

Total voltage and discharge for lead acid battery

A

2 V

1.83 V discharge

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4
Q

Voltage and discharge for a nickel cadmium battery

A

1.2 V

1 V

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5
Q

Factors of mercury oxide coil cell

A

Negative pole - compressed zinc powder
Positive pole- mercury oxide

Electrolyte - lime potash

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6
Q

Voltage for a mercury oxide coin cell

A

1.35 V

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7
Q

Characteristic of a mercury oxide coin cell

A

Constant internal resistant

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8
Q

Silver oxide coin cells

A

Silver oxide , lime potash and zinc

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9
Q

Voltage for lithium coin cells

A

3.5V

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10
Q

What are primary cells

A

Batteries that immediately supply a voltage and are non reversible. Can not be recharged

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11
Q

An example of a primary cell

A

Zinc carbon battery

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12
Q

What is a secondary cell

A

A rechargeable battery that is used for aircraft

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13
Q

What are thermocouples

A

Similar metals welded together to measure temperatures above 0K
They measure the exhaust gas temperature in engines

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14
Q

Factors of a parallel circuit

A

Like terminals
Current - Split
Voltage - Constant
Resistance - R= 1/Rt

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15
Q

Factors of a series circuit

A

Unlike terminals
Current: constant
Voltage: Sum
Resistance: Sum

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16
Q

What is single phase voltage

A

115 V

17
Q

What is the voltage for phase to phase

A

200V

18
Q

What is the degrees for separation of coils

A

120 degrees

19
Q

What is the ambient temp for a wire

A

25

20
Q

Max temp for a wire

A

60

21
Q

What temperature do thermocouples operate

A

-200 - 2,300

22
Q

What is RMS for Ac

A

0.707

23
Q

What is the amplitude

A

0 to the peak

24
Q

What is the symbol for current

A

I

25
Q

Symbol for charge

A

Q

26
Q

Symbol for resistance

A

R

27
Q

Symbol for temp

A

T

28
Q

Symbol for current density

A

J

29
Q

Symbol for conductance

A

G

30
Q

What does Vpk mean

A

Voltage peak

31
Q

What does Vpk-pk mean

A

Peak to peak

32
Q

What are the characteristic for AC

A 
Average is 0
Velocity changed over time
Polaris changes 
Sine curve 
Repeats
33
Q

Why do we use a multi phase generator

A

We can get two different voltages

34
Q

What are the advantages and disadvantages of a nickel cadmium battery

A

Power to weight ratio.
Larger capacity

Dis
Costly
Larger

Module 3 - Electrical Systems (3 decks)

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