EIAT Basic Electrical Principles 5

Question 1

What is the effect of increasing temperature on the resistance of most metallic conductors?

Accepted Answer

Resistance increases

Answer

In most metals, higher temperatures cause increased atomic vibration, which impedes electron flow and raises resistance.

Question 2

In a parallel circuit with two branches carrying 4A and 6A respectively, what is the total current from the source?

Accepted Answer

10 A

Answer

In a parallel circuit, total current equals the sum of branch currents: 4 + 6 = 10 A.

Question 3

What is 'apparent power' in an AC circuit measured in?

Accepted Answer

Volt-amperes (VA)

Answer

Apparent power is the product of RMS voltage and RMS current in an AC circuit, expressed in volt-amperes (VA).

Question 4

Which type of motor is most commonly used in elevator traction drives?

Accepted Answer

AC induction motor

Answer

AC induction motors are widely used in elevator traction drives due to their reliability, low maintenance, and efficiency with variable frequency drives.

Question 5

What does a voltmeter measure and how should it be connected in a circuit?

Accepted Answer

Voltage; connected in parallel

Answer

A voltmeter measures the potential difference (voltage) between two points and must be connected in parallel across those points.

EIAT - Elevator Industry Aptitude Test Practice Test

EIAT - Elevator Industry Aptitude Test Practice Test

EIAT Basic Electrical Principles 5