EIT Electrical, Thermodynamics & Fluid Systems

Question 1

What is the primary unit of electric current?

Accepted Answer

Ampere

Answer

The Ampere (A) is the primary and base SI unit of electric current. It quantifies the rate of flow of electric charge through a conductor. Other options like Volt (unit for electric potential difference), Ohm (unit for electrical resistance), and Watt (unit for power) are related but measure different electrical quantities.

Question 2

What does the first law of thermodynamics state?

Accepted Answer

Energy is conserved and changes form

Answer

The first law of thermodynamics, also known as the Law of Conservation of Energy, states that energy cannot be created or destroyed in an isolated system. Instead, it can only be transformed from one form to another, such as from potential energy to kinetic energy or from chemical energy to heat. This fundamental principle underpins all energy transformations in physical and chemical processes.

Question 3

What type of fluid flow has layers sliding past each other smoothly?

Accepted Answer

Laminar flow

Answer

Laminar flow is a type of fluid motion characterized by smooth, parallel layers of fluid that slide past each other without significant mixing. This occurs at low Reynolds numbers, where viscous forces dominate inertial forces. In contrast, turbulent flow involves chaotic, irregular fluid motion with eddies and vortices.

Question 4

What device is used to measure electric potential difference?

Accepted Answer

Voltmeter

Answer

A voltmeter is an instrument specifically designed to measure the electric potential difference, or voltage, between two points in an electrical circuit. It is connected in parallel across the components where the voltage measurement is desired. Ammeters measure current, ohmmeters measure resistance, and galvanometers detect small currents.

Question 5

In thermodynamics, what does entropy represent?

Accepted Answer

Degree of disorder

Answer

In thermodynamics, entropy is a measure of the disorder or randomness within a system. The second law of thermodynamics states that the total entropy of an isolated system can only increase over time, or remain constant in ideal cases. This means that systems naturally tend towards states of greater disorder and energy dispersal.

(EIT) Engineer In Training Certification Practice Test

(EIT) Engineer In Training Certification Practice Test

EIT Electrical, Thermodynamics & Fluid Systems