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

Ohm's Law states that Current (I) = Voltage (V) / Resistance (R). In this scenario, I = 24V / 8Ω, which equals 3A.

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

A primary characteristic of a series circuit is that it provides only a single path for the current to flow. Therefore, the amount of current is constant at all points throughout the circuit.

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

Electrical power (P, in Watts) is calculated by multiplying voltage (V) by current (I). Therefore, P = 120V * 2A = 240W.

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

In a parallel circuit, all components are connected across the same two points of the circuit. This means that the voltage across each component is the same as the source voltage.

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

The fundamental difference is that Direct Current (DC) flows in a single, constant direction, while Alternating Current (AC) periodically reverses its direction of flow.

EIAT - Elevator Industry Aptitude Test Practice Test

EIAT - Elevator Industry Aptitude Test Practice Test

EIAT - Elevator Industry Aptitude Basic Electrical Principles Questions and Answers