Question 1: The input side of the transformer is termed as ……………………….
- Primary side
- Secondary side
- High voltage side
- Low voltage side
HVAC
NEC 2023
HVAC Basic Electrical Questions -2
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HVAC electrical exams cover electrical theory (Ohm's Law, circuits), transformers, single-phase and three-phase motors, control wiring, safety, and troubleshooting.
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TimeHVAC Basic Electrical Questions -2 — Question List
Question 2: What is the measuring unit of inductance?
- Henry
- Farad
- Ohm
- Mho
Question 3: If smallest resistance and higher resistance resistors are connected in parallel, what will be its equivalent resistance?
- Less than smallest resistance resistor
- Equal to smallest resistance resistor
- Equal to highest resistance resistor
- Higher than smallest resistance resistor and lesser than highest resistance resistor
Question 4: The strength of electronic magnet or coil conductor depends on the amount of ……………………
- Current flow in the coil
- Voltage applied to the coil
- Power of the coil
Question 5: An electric current seeks the path of ……………..
- Low resistance
- High resistance
- Low reluctance
- High reluctance
Question 6: A magnetic field seeks the path of ………….
- Low reluctance
- High reluctance
- Less resistance
- High resistance
Question 7: A DC meter can be used to measure AC by inserting a ………………….. in series with meter movement?
- Rectifier
- Capacitor
- Impedance
- Inductor
Question 8: A meter which is used to measure low resistances is ……………..
- Series ohmmeter
- Shunt ohmmeter
- Impedance meter
- Combination of voltmeter and ammeter
Question 9: Which of the following is used to check insulation breakdown in motors and compressors?
- Shunt ohmmeter
- Multimeter
- Megger
- Capacitive volt meter
Question 10: A halogen leak detector can detect refrigerant leaks as small as …………….ounce per year
- 0.5
- 1
- 1.5
- 2
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