Question 1 of 6
Intermediate

A magnetic field is created around an electrical conductor when an electric current is passed through it. This is known as what?

Question 2 of 6
Intermediate

Which of the following electrical devices is most commonly used to start a single-phase motor?

Question 3 of 6
Intermediate

How far apart are the phase windings (electrical degrees) in a three-phase induction motor?

Question 4 of 6
Intermediate

A rotating magnetic field can be created by using which of the following?

Question 5 of 6
Intermediate

How can the magnetic field around an electrical conductor be strengthened?

Question 6 of 6
Intermediate

Which of the following single-phase motors offers the lowest starting torque?

Question 6 of 6
Intermediate

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1: A magnetic field is created around an electrical conductor when an electric current is passed through it. This is known as what?
Magnetism
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1: A magnetic field is created around an electrical conductor when an electric current is passed through it. This is known as what?
Resistance
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1: A magnetic field is created around an electrical conductor when an electric current is passed through it. This is known as what?
Electromagnetism
1: A magnetic field is created around an electrical conductor when an electric current is passed through it. This is known as what?
Opposites attract
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2: Which of the following electrical devices is most commonly used to start a single-phase motor?
Resistor
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2: Which of the following electrical devices is most commonly used to start a single-phase motor?
Switch
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2: Which of the following electrical devices is most commonly used to start a single-phase motor?
Thermostat
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2: Which of the following electrical devices is most commonly used to start a single-phase motor?
Capacitor
3: How far apart are the phase windings (electrical degrees) in a three-phase induction motor?
45 degrees
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3: How far apart are the phase windings (electrical degrees) in a three-phase induction motor?
90 degrees
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3: How far apart are the phase windings (electrical degrees) in a three-phase induction motor?
180 degrees
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3: How far apart are the phase windings (electrical degrees) in a three-phase induction motor?
120 degrees
4: A rotating magnetic field can be created by using which of the following?
Alternating current
4: A rotating magnetic field can be created by using which of the following?
Magnets
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4: A rotating magnetic field can be created by using which of the following?
Magnetism
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4: A rotating magnetic field can be created by using which of the following?
Magnetic flux
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5: How can the magnetic field around an electrical conductor be strengthened?
Reduce the voltage
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5: How can the magnetic field around an electrical conductor be strengthened?
Wind it into a coil around an iron core
5: How can the magnetic field around an electrical conductor be strengthened?
Add more poles
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5: How can the magnetic field around an electrical conductor be strengthened?
None of the above
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6: Which of the following single-phase motors offers the lowest starting torque?
Capacitor start/Induction run (CSIR)
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6: Which of the following single-phase motors offers the lowest starting torque?
Capacitor start/Capacitor run (CSCR)
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6: Which of the following single-phase motors offers the lowest starting torque?
Resistance start/Induction run (RSIR)
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6: Which of the following single-phase motors offers the lowest starting torque?
Permanent-split capacitor (PSC)