Electrical and Mechanical Troubleshooting Quiz

Prioritization of Quality, Safety, Waste, and Efficiency

• Quality, Safety, Waste, and Efficiency should be prioritized in the following order: Safety, Quality, Efficiency, and Waste.

3-Phase Motor Running in the Wrong Direction

• If a 3-phase motor is running in the wrong direction, the steps to be taken are:
  • Check the motor wiring diagram to ensure correct connections.
  • Verify the motor rotation direction using a multimeter or other test equipment.
  • Correct the wiring connections to match the motor wiring diagram.

Wiring a New Receptacle

• The silver screw on a receptacle is for: Neutral wire.

Troubleshooting a Standing Pilot Water Heater

• If the pilot light on a standing pilot water heater won't stay lit, the possible cause is: Thermocouple.

Series Resistance Calculation

• 35 resistors of 15 ohms each connected in a series have a total resistance of: 525 ohms.

Discrete Input Card vs. Analog Card

• A discrete input card is used for digital signals, while an analog card is used for analog signals.

Positive Displacement Pump Cavitation

• If a positive displacement pump is cavitating, a high likely cause is: Air in the pump.

3-Phase System Voltage Measurement

• In a 480V 3-phase system, the meter reading from one leg to ground would be: 277V.

Grease Fire Extinguisher

• The best type of fire extinguisher to use for putting out a grease fire is: Baking soda.

Automatically Operated Electrical Switch

• An automatically operated electrical switch designed to protect an electrical circuit from damage caused by overload is called: Circuit breaker.

Painting a Room

• The number of gallons of paint required to paint the walls of a 7'6" x 9' room with an 8' ceiling height is: ½ gallon.

Neutral Wire Color

• In a 100-220 volt three-wire circuit, the neutral wire is usually: White.

Tubing Dimensions

• Tubing with an outside diameter of 2" and a wall thickness of 1/16" has an inside diameter of: 1 ¾".

Testing Elements on a Forced Air Electric Heater

• The best way to test if the elements on a forced air electric heater work or come on properly is by using: Continuity tester.

Thermocouple Operation

• The thermocouple on a gas heater operates: Gas valve.

Electrical Fire Extinguisher

• The correct substance to use in putting out an electrical fire is: Co2 or Baking soda.