Question 1: Which of the following instrument detects the bubbles in refrigerant liquid line?
- Megger
- Electronic sight glass
- Electronic charging meter
- Halogen leak detector
HVAC
NEC 2023
HVAC Basic Electrical Questions -3
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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.
Requirements vary by state. HVAC technicians typically need EPA 608 certification and may need a separate electrical license for line voltage work.
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TimeHVAC Basic Electrical Questions -3 — Question List
Question 2: The battery cells connected in series produces …………..
- Higher voltages
- Higher currents
- High power
- High resistance
Question 3: A fuse in the electrical circuit protects the circuit from ……………..
- Excess power
- Excess current
- Excess voltage
- Excess impedance
Question 4: In parallel resistive network the voltage applied is equal to sum of voltages across the each individual resistor?
- True
- False
Question 5: Which of the following is the symbol of impedance?
- Z
- I
- R
- V
Question 6: What is the power flow in a circuit, if a 50 coulombs moved at a point in 20 seconds with an applied voltage of 8 Volts?
- 3.2 watts
- 20 watts
- 8 watts
- 8 watts
Question 7: Which of the following is produced around the conductor if an electric current passes through it?
- Magnetic field
- Negative field
- Static field
- Capacitance field
Question 8: If the resistance of the circuit is decreases keeping the voltage same, what happens to the current in the circuit?
- Increases
- Decreases
- Remains same
Question 9: Which of the following batteries action provides electricity?
- Chemical
- Electrical
- Mechanical
- Hydroelectric
Question 10: An ohm meter cannot simple connected to …………….
- Coil
- Motor winding
- Resistor
- Energized circuit
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