EIAT - Elevator Industry Aptitude Basic Electrical Principles Questions and Answers

Question 1

A technician measures a voltage of 24 VDC across a resistor with a resistance of 8 ohms. According to Ohm's Law, what is the current flowing through the resistor?

Accepted Answer

3 A

Answer

192 A

Answer

0.33 A

Answer

32 A

Question 2

In a simple series circuit containing three light bulbs, which of the following statements is true about the electric current?

Accepted Answer

The current is the same through all three bulbs.

Answer

The current is divided equally among the three bulbs.

Answer

The current is highest at the first bulb and lowest at the last.

Answer

The total current is the sum of the current in each bulb.

Question 3

An elevator's door motor operates on a 120V AC circuit and draws a current of 2 amps. How much power does the motor consume?

Accepted Answer

240 Watts

Answer

60 Watts

Answer

122 Watts

Answer

0.016 Watts

Question 4

If two components in an elevator's control panel are wired in parallel to a 24V DC power source, what is the voltage across each component?

Accepted Answer

24V across each

Answer

12V across each

Answer

48V total across both

Answer

It depends on the resistance of each component.

Question 5

What is the primary characteristic that distinguishes Alternating Current (AC) from Direct Current (DC)?

Accepted Answer

The direction of current flow periodically reverses in AC.

Answer

AC has a higher voltage than DC.

Answer

The flow of current is constant in one direction in AC.

Answer

DC can only be used for low-power devices.

Question 6

A technician is troubleshooting a circuit that keeps shutting off. They find a device designed to open the circuit automatically if the current becomes excessive. What is the primary function of this device?

Accepted Answer

To protect the circuit from overcurrent conditions.

Answer

To increase the voltage in the circuit.

Answer

To store electrical charge for later use.

Answer

To convert AC to DC.