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313D Refrigeration Training > 313D Electrical Exam (complete) > Flashcards

313D Electrical Exam (complete) Flashcards

Electrical (68 cards)

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1
Q

If the total voltage drop in a circuit does not equal the applied voltage?

A

Poor wire connection

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2
Q

A blackened fuse indicates?

A

Short Circuit

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3
Q

The total resistance in a parallel circuit?

A

Will be lower than the lowest resistance

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4
Q

If the current through a conductor increases, the magnetic field around the conductor will?

A

Increase

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5
Q

A fuse that is good will have a resistance of?

A

A measurable resistance

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6
Q

A blown fuse will have a reading of?

A

Infinity(OL)

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7
Q

Four Resisters are connected in Parellel, the current flow will be highest through which resistor?
1. 3 Ohms
2. 5 Ohms
3. 7 Ohms
4. 9 Ohms

A

3 Ohms

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8
Q

The value of two 5 MFD Capacitors connected in Parellel are?

A

10 MFD

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9
Q

The value of two 5MFD Capacitors connected in series is?

A

2.5 MFD

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10
Q

The value of two 20 Ohm resistors in parellel is

A

10 Ohms

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11
Q

The value of two 20 ohms resistors in series is?

A

40 Ohms

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12
Q

The ohm reading across a closed switch should be?

A

0 Ohms

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13
Q

The voltage reading across an open switch should be?

A

The applied voltage

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14
Q

Which conductor has the largest cross section or diameter?
1. #10
2. #12
3. #18
4. #14

AWG

A

10

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14
Q

14awg wire is rated to carry____ amps max?

A

15

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14
Q

10 awg wire is rated to carry____ amps max?

A

30

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15
Q

How many conductors can be wrapped around a screw terminal on a switch or receptacle?

A

One

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16
Q

What is the minimum distance that conductors must extend into a junction box?

A

6”

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17
Q

If using an analog Ohmeter and the needle points to the symbol “0” what does this indicate?

A

Measurable resistance

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18
Q

If using an analog ohmmeter and the needle points to (8) symbol what does this indicate?

A

Open circuit

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19
Q

When using an analog voltmeter to measure an unknown votage, what range should your meter be set to?

A

0-750 V

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20
Q

If using an analog voltmeter to what should you set your meter scale to on a 120 volt circuit?

A

0-125 V

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21
Q

If the resistance remains constant in a circuit, and the voltage goes down, what will the remaining amperage do?

A

Go down

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22
Q

If the amperage remains constant in a circuit, and the resistance goes down, what will the voltage do?

A

Decrease

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23
If the voltage remains constant, and the resistance goes down, what will the amperage do?
Go up
24
A contactor resembles?
A relay
25
Transformer output is measured in what units?
VA Volt-amps
26
A 120 volt primary and a 24 secondary, would be considered what type of transformer?
Step down
27
The neutral connections on a receptacle are attached to what color terminal?
Silver
28
The hot connections on a receptacle are attched at what color terminal?
Gold
29
Potential is another term used for?
Voltage
30
How many BTU's are there in 10,000 W(10kW) of power?
34,100
31
How many BTU's are there in 1 watt of power?
3.41
32
Voltage may also be expressed as
Electromotive force
33
When measuring parellel circuit amperage
Use an ammeter in Series with the load
34
When measuring a parellel circuit voltage
Use a voltmeter in parellel with the load
35
When measuring series circuit amperage?
Use an ammeter in series with the load
36
In a series circuit…?
There is one path for current to flow
37
The number of watts an appliance is using is obtained by?
Multiplying the voltage and amperage used by the appliance
38
Resistance is measured in?
Ohms
39
Amperage is measured in?
Amperes
40
Voltage is measured in?
Volts
41
Power is measured in?
Watts
42
How many watts are in one horsepower?
746
43
In the E,I,R triangle (Ohm's Law) the 'R' represents?
Resistance
44
In the E,I,R triangle the 'I' represents?
Amperage
45
In the E,I,R triangle the 'E' represents?
Voltage
46
Resistance in an electrical circuit is compared to what in a water piping system?
Resistance ex pipe size
47
Amperage in an electrical circuit is compared to what in a water piping system?
Flow
48
Voltage in an electrical circuit is compared to what in a water piping system?
Pressure
49
What devices are used in the circuit for amperage protection?
Fuses
50
How many Milliamps are found in 1 ampere?
1000
51
A kilovolt has how many volts?
1000
52
How many millivolts are there in a volt?
1000
53
The simple electrical circuit consist of?
Conductors, load,energy source
54
Rubber, glass and wood are good?
Insulators
55
Atoms are electrically neutral when they contain the same number of?
Protons and electrons
56
Copper and aluminum are good..?
Conductors
57
What are the three components that make up atoms?
Electrons, protons, neutrons
58
What is the term used to indicate that equipment is safe to be worked on?
The "Zero" mechanical state
59
After a lock is installed on equipment being serviced, who can remove the lock?
The person who installed the lock
60
What is the minimum sized bonding cable that can be used to bond the electrical system to the water supply?
6 Gauge
61
What must be marked on the electrical distribution panel when installing a breaker?
The name of the appliance served by the breaker
62
What is the minimum distance electrical equipment can be installed from a gas regulator?
36”
63
When a co-worker is being shocked, what is the most important rule to remember?
Disconnect power to circuit
64
The main factors affecting electrical shock are?
Amount of current, amount of voltage, condition of skin,
65
The main concern with static electricity is?
Arcing
66
A fuse that is blown will have a resistance reading of?
Infinity (OL)

313D Refrigeration Training (10 decks)

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