Ramsay Test Electrical Knowledge 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
Two equal resistors in parallel give half the value of one resistor.
Question 2: In a series circuit, what stays the same through every component?
- Current (Correct answer)
- Voltage
- Resistance
- Power
Correct answer: Current
Current is identical at every point in a series circuit.
Question 3: What does a transformer's turns ratio determine?
- The ratio of primary to secondary voltage (Correct answer)
- The frequency of the output
- The total resistance
- The direction of current
Correct answer: The ratio of primary to secondary voltage
Voltage transforms in direct proportion to the turns ratio between windings.
Question 4: Which device protects a circuit by melting and breaking when current is too high?
- Fuse (Correct answer)
- Capacitor
- Diode
- Resistor
Correct answer: Fuse
A fuse contains a metal element that melts under excessive current.
Question 5: What is the power dissipated by a 120 V appliance drawing 5 A?
- 600 W (Correct answer)
- 24 W
- 125 W
- 115 W
Correct answer: 600 W
Power equals voltage multiplied by current (120 × 5 = 600 W).
Question 6: What is the primary function of a circuit breaker?
- To automatically interrupt overcurrent and be reset (Correct answer)
- To increase voltage
- To store electric charge
- To convert AC to DC
Correct answer: To automatically interrupt overcurrent and be reset
A breaker trips on overcurrent and can be reset rather than replaced.
Question 7: In North American residential wiring, what color is typically used for the grounding conductor?
- Green or bare (Correct answer)
- Black
- Red
- White
Correct answer: Green or bare
Ground conductors are green, green with yellow stripe, or bare copper.
Ramsay Test Electrical Knowledge 2
What is the total resistance of two 10-ohm resistors connected in parallel?