Energy and the First Law of Thermodynamics: Interactive Learning Quizzes

Question 1

The First Law of Thermodynamics asserts that:

Accepted Answer

Energy can neither be created nor destroyed.

Answer

Energy can be created but not destroyed.

Answer

Energy can be destroyed but not created.

Answer

Energy can be both created and destroyed.

Question 2

In the International System of Units (SI), the unit of energy is:

Accepted Answer

Joule

Answer

Newton

Answer

Watt

Answer

Pascal

Question 3

The work done by a gas during an isothermal expansion is given by which of the following expressions?

Accepted Answer

PVln(V/Vi)

Answer

PV

Answer

PV(V/Vi-1)

Answer

0

Question 4

Which of the following devices functions as a heat engine?

Accepted Answer

A steam turbine

Answer

A refrigerator

Answer

A solar cell

Answer

A battery

Question 5

The efficiency of a heat engine is defined as:

Accepted Answer

The ratio of work done to heat input

Answer

The ratio of heat input to work done

Answer

The ratio of heat rejected to heat input

Answer

The ratio of heat rejected to work done

Question 6

Which fundamental principle states that energy cannot be created or destroyed within a closed system?

Accepted Answer

First Law of Thermodynamics

Answer

Second Law of Thermodynamics

Answer

Zeroth Law of Thermodynamics

Question 7

How does the concept of energy quality impact energy transfer and conversion processes?

Accepted Answer

Energy quality determines the potential for useful work and influences efficiency.

Answer

Energy quality affects the rate of energy transfer but not efficiency.

Answer

Energy quality is irrelevant in energy conversion processes.

Answer

Energy quality measures the purity of energy sources.

Question 8

Identify the form of energy that is NOT included in the following list:

Accepted Answer

Time

Answer

Heat

Answer

Work

Answer

Electrical energy

Question 9

According to the first law of thermodynamics, which statement is accurate?

Accepted Answer

Energy can be transferred or converted between forms, but it cannot be created or destroyed.

Answer

Energy can be created or destroyed at will.

Answer

Heat always flows from cold to hot objects.

Answer

Entropy always increases in any process.

Question 10

Which thermodynamic process maintains constant pressure?

Accepted Answer

Constant pressure process

Answer

Constant volume process

Answer

Adiabatic process

Answer

Isothermal process

Question 11

Identify the type of system that permits neither heat nor mass transfer:

Accepted Answer

System allowing neither heat nor mass transfer

Answer

System allowing heat and mass transfer

Answer

System allowing heat transfer but not mass transfer

Answer

System allowing mass transfer but not heat transfer

Question 12

What is entropy?

Accepted Answer

Measure of disorder or randomness within a system

Answer

Measure of energy contained within a system

Answer

Measure of temperature of a system

Answer

Measure of volume of a system

Question 13

Which of the following is not a form of energy?

Accepted Answer

Mass

Answer

Kinetic energy

Answer

Heat

Answer

Potential energy

Question 14

How does enhancing the efficiency of an energy conversion process directly contribute to improved system performance?

Accepted Answer

Minimizes energy loss and optimizes energy utilization

Answer

Increases system power output

Answer

Enhances system reliability

Answer

Improves the durability of the system

Question 15

Which of the following is NOT a form of energy?

Accepted Answer

Time

Answer

Thermal energy

Answer

Kinetic energy

Answer

Potential energy

Question 16

The first law of thermodynamics states that:

Accepted Answer

Energy cannot be created or destroyed, only transferred or transformed.

Answer

Energy is always conserved in all processes.

Answer

The total energy of an isolated system decreases over time.

Question 17

In a closed system, energy can be transferred in the form of:

Accepted Answer

Heat, work, or both.

Answer

Work only.

Answer

Heat only.

Question 18

The internal energy of a system is:

Accepted Answer

The total amount of energy contained within the system.

Answer

The kinetic energy of the system

Answer

The potential energy of the system

Question 19

Which of the following is a cyclic process?

Accepted Answer

A process that returns the system to its initial state.

Answer

A process that involves isothermal expansion.

Answer

A process that involves heat transfer only.

Question 20

The efficiency of a heat engine is:

Accepted Answer

The ratio of the work output to the heat input.

Answer

The ratio of the heat input to the work output.

Answer

The ratio of the internal energy change to the work output.