Fundamentals of Engineering Basic 4

Question 1

Which thermodynamic law states that energy cannot be created or destroyed?

Accepted Answer

First Law

Answer

The First Law of Thermodynamics is the law of conservation of energy.

Question 2

What is the efficiency of a heat engine that absorbs 1000 J and rejects 600 J?

Accepted Answer

40%

Answer

Efficiency η = (Q_H − Q_C) / Q_H = (1000 − 600) / 1000 = 0.40 = 40%.

Question 3

Which process occurs at constant pressure?

Accepted Answer

Isobaric

Answer

An isobaric process occurs at constant pressure, while the other terms describe constant temperature, constant volume, and no heat transfer respectively.

Question 4

The ideal gas law is best expressed as:

Accepted Answer

PV = nRT

Answer

The ideal gas law PV = nRT relates pressure, volume, moles, and temperature using the universal gas constant R.

Question 5

Entropy is a measure of:

Accepted Answer

Disorder or randomness of a system

Answer

Entropy quantifies the degree of disorder or the number of possible microscopic configurations of a thermodynamic system.

Fundamentals of Engineering Practice Test

Fundamentals of Engineering Practice Test

Fundamentals of Engineering Basic 4