Ramsay Test Electrical Knowledge 4

Question 1

What is the purpose of a GFCI outlet?

Accepted Answer

To cut power when it detects a ground fault

Answer

To boost voltage to appliances

Answer

To convert AC to DC

Answer

To store backup power

Question 2

In a 240 V single-phase residential supply, how is the voltage typically derived?

Accepted Answer

Two 120 V legs out of phase

Answer

A single 240 V leg to ground

Answer

Three phases combined

Answer

A step-up transformer at the outlet

Question 3

What does an inductor oppose changes in?

Accepted Answer

Current

Answer

Voltage

Answer

Resistance

Answer

Temperature

Question 4

What happens to total resistance when you add more resistors in series?

Accepted Answer

It increases

Answer

It decreases

Answer

It stays the same

Answer

It becomes zero

Question 5

A diode primarily allows current to flow in how many directions?

Accepted Answer

One

Answer

Two

Answer

Three

Answer

None

Question 6

What is the main advantage of three-phase power over single-phase for motors?

Accepted Answer

Smoother, more constant power delivery

Answer

Lower voltage requirement

Answer

No need for grounding

Answer

Cheaper wiring everywhere

Question 7

What instrument measures the resistance of a de-energized circuit or component?

Accepted Answer

Ohmmeter

Answer

Ammeter

Answer

Wattmeter

Answer

Frequency meter