Question 1: To protect an electrical circuit a fuse should be placed in ………………….
- Series
- Parallel
- Both series and parallel
HVAC
NEC 2023
HVAC Basic Electrical Questions -4
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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 -4 — Question List
Question 2: If the is no deflection in a voltmeter which is used to measure voltage between two electrical contacts it indicates ……………..
- Two contacts are shorted
- Two contacts are opened
- Two contacts are driven by same voltage source
- Same current is flowing across two contacts
Question 3: The primary winding of a transformer has 1000 turns and secondary coil has 400 turns. What will be its secondary voltage if 480 volts is applied at primary?
- 192 volts
- 240 volts
- 480 volts
- 1200 volts
Question 4: A magnetic field seeks the path of ………….
- Low reluctance
- High reluctance
- Less resistance
- High resistance
Question 5: Which of the following meter is used to measure electrical pressure in the circuit?
- Voltmeter
- Ammeter
- Ohmmeter
- Wattmeter
Question 6: Which of the following is used to measure high resistance of circuit?
- Series ohmmeter
- Shunt ohmmeter
- Impedance meter
- Wattmeter
Question 7: Battery cells connected in parallel produces ………….
- Higher current
- Higher voltages
- High power
Question 8: Which of the following battery cell can be recharged?
- Primary cell
- Secondary cell
Question 9: How many 1.5 volts cells should be connected in series to form a 9 volt battery?
- 4
- 6
- 9
- 2
Question 10: A primary cell is a device which converts …………………
- Chemical energy into electrical energy
- Electrical energy into chemical energy
- Mechanical energy into electrical energy
- Electrical energy into mechanical energy
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