Ramsay Test Electrical 2 — Questions and Answers
Question 1: What is the total resistance of two 10-ohm resistors connected in parallel?
- 5 ohms (Correct answer)
- 10 ohms
- 20 ohms
- 0.5 ohms
Correct answer: 5 ohms
Equal parallel resistors give half the value, so 10/2 = 5 ohms.
Question 2: Which device protects a circuit by melting when current exceeds a rated value?
- Fuse (Correct answer)
- Capacitor
- Relay
- Transformer
Correct answer: Fuse
A fuse contains a metal element that melts to open the circuit during overcurrent.
Question 3: In a purely resistive AC circuit, the voltage and current are:
- In phase (Correct answer)
- 90 degrees out of phase
- 180 degrees out of phase
- 45 degrees out of phase
Correct answer: In phase
Resistance does not shift phase, so voltage and current peak together.
Question 4: What unit measures electrical power?
- Watt (Correct answer)
- Volt
- Ampere
- Ohm
Correct answer: Watt
Power is measured in watts, the product of volts and amperes.
Question 5: A step-down transformer has more turns on which winding?
- Primary (Correct answer)
- Secondary
- Both equal
- Neither has turns
Correct answer: Primary
A step-down transformer has more primary turns to lower the secondary voltage.
Question 6: What is the purpose of a grounding conductor?
- Provide a safe path for fault current (Correct answer)
- Increase circuit voltage
- Store electrical energy
- Reduce wire resistance
Correct answer: Provide a safe path for fault current
Grounding gives fault current a low-resistance path to safely trip protection.
Question 7: Doubling the voltage across a fixed resistor will:
- Double the current (Correct answer)
- Halve the current
- Quadruple the current
- Not change the current
Correct answer: Double the current
By Ohm's law, current is proportional to voltage for a fixed resistance.
Ramsay Test Electrical 2
What is the total resistance of two 10-ohm resistors connected in parallel?