Ramsay Test Electrical Knowledge 1

Question 1

Which of the following best describes the relationship between voltage, current, and resistance in a DC circuit?

Accepted Answer

Current equals voltage divided by resistance

Answer

Voltage equals current divided by resistance

Answer

Resistance equals current multiplied by voltage

Answer

Current equals resistance divided by voltage

Question 2

A circuit has a voltage of 120V and a resistance of 30 ohms. What is the current flowing through the circuit?

Accepted Answer

4 amps

Answer

3,600 amps

Answer

0.25 amps

Answer

150 amps

Question 3

What does a normally open (NO) contact do in a relay circuit?

Accepted Answer

Passes current only when the relay coil is energized

Answer

Passes current only when the relay coil is de-energized

Answer

Always allows current to flow

Answer

Blocks current in both states

Question 4

Which wire color is typically used for the grounding conductor in standard US residential wiring?

Accepted Answer

Green or bare copper

Answer

White

Answer

Black

Answer

Red

Question 5

What type of circuit has two or more resistors connected end-to-end, sharing the same current path?

Accepted Answer

Series circuit

Answer

Parallel circuit

Answer

Bridge circuit

Answer

Shunt circuit

Question 6

A transformer steps voltage up from 120V to 480V. What is the turns ratio of primary to secondary?

Accepted Answer

1:4

Answer

4:1

Answer

1:2

Answer

2:1

Question 7

Which of the following is the correct definition of electrical power?

Accepted Answer

Power equals voltage multiplied by current

Answer

Power equals voltage divided by current

Answer

Power equals current divided by voltage

Answer

Power equals voltage plus current

Question 8

What is the purpose of a fuse in an electrical circuit?

Accepted Answer

To protect the circuit by interrupting current when it exceeds a safe level

Answer

To increase circuit voltage

Answer

To reduce electrical resistance

Answer

To convert AC to DC

Question 9

In a 3-phase system, what is the phase angle difference between each phase?

Accepted Answer

120 degrees

Answer

90 degrees

Answer

60 degrees

Answer

180 degrees

Question 10

Which instrument is used to measure electrical resistance in a circuit?

Accepted Answer

Ohmmeter

Answer

Voltmeter

Answer

Ammeter

Answer

Wattmeter