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Thomas Johnston - Test
  • 1. Where was Thomas Johnston born?
A) India
B) United States
C) Australia
D) Scotland
  • 2. What type of energy is typically associated with electric motors?
A) Nuclear energy
B) Solar energy
C) Electrical energy
D) Wind energy
  • 3. What material is traditionally used to create the coils in an electric motor?
A) Steel
B) Silver
C) Aluminum
D) Copper
  • 4. Which physical principle is fundamental to the operation of an electric motor?
A) Quantum mechanics
B) Thermodynamics
C) Electromagnetism
D) Kinetic energy
  • 5. What is a common issue that can occur with electric motors due to prolonged use?
A) Overspeeding
B) Underpowering
C) Short-circuiting
D) Overheating
  • 6. In which industry are electric motors commonly used for automation and control systems?
A) Construction
B) Agriculture
C) Manufacturing
D) Healthcare
  • 7. What do VFDs (Variable Frequency Drives) do in relation to electric motors?
A) Adjust wire gauge
B) Stabilize electrical current
C) Change motor size
D) Control motor speed and torque
  • 8. What is the role of the commutator in an electric motor?
A) Stores energy
B) Generates electricity
C) Reverses the direction of current
D) Regulates motor speed
  • 9. What role do capacitors play in some electric motors?
A) Suppress electromagnetic interference
B) Improve power factor
C) Regulate voltage
D) Store kinetic energy
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