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Test: Basic Concept - 3 - Mechanical Engineering MCQ


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10 Questions MCQ Test Thermodynamics - Test: Basic Concept - 3

Test: Basic Concept - 3 for Mechanical Engineering 2024 is part of Thermodynamics preparation. The Test: Basic Concept - 3 questions and answers have been prepared according to the Mechanical Engineering exam syllabus.The Test: Basic Concept - 3 MCQs are made for Mechanical Engineering 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Basic Concept - 3 below.
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Test: Basic Concept - 3 - Question 1

 The study of thermodynamics provides answer to the followings:
1. whether a process is feasible or not
2. to quantity the energy required for a process
3. rate or speed with which a process occurs
4. extent to which a reaction/process takes place

Which of the above statements are correct?

Detailed Solution for Test: Basic Concept - 3 - Question 1

The correct answer is 3: 1, 2, and 4.

1. The study of thermodynamics can determine whether a process is feasible or not. This is done by analyzing the energy changes and entropy changes associated with the process. If the energy change is positive (indicating energy input) and the entropy change is negative (indicating a decrease in disorder), the process may not be feasible.

2. Thermodynamics allows us to quantify the energy required for a process. By analyzing the energy changes (such as heat and work) associated with a reaction or process, we can determine the amount of energy needed for it to occur.

3. The study of thermodynamics does not directly provide information about the rate or speed with which a process occurs. However, it can provide insights into the factors that influence reaction rates, such as temperature and pressure. This is because the rate of a reaction is influenced by the energy changes involved (activation energy) and the thermodynamic properties of the reactants and products.

4. Thermodynamics also provides information about the extent to which a reaction or process takes place. This is typically determined by the concept of equilibrium, which is governed by the thermodynamic properties of the system. The equilibrium constant of a reaction is related to the extent to which reactants are converted into products at equilibrium.

Test: Basic Concept - 3 - Question 2

Consider the following statements:

1. Thermodynamic properties are the macroscopic coordinates significant only for systems existing in states of thermodynamic equilibrium.
2. Engineering thermodynamic studies about transfer and transformation of energy.
3. Engineering thermodynamics studies about storage, transfer and transformation of energy.

Which of the above is/are correct?

Test: Basic Concept - 3 - Question 3

An adiabatic boundary is one which

Test: Basic Concept - 3 - Question 4

Match the following List-I with List-ll:

List-I
A. Centrifugal fan
B. Control volume
C. Intensive property
D. Microscopic property

List-ll
1. Open system
2. Internal energy
3. Filling a tire at air station
4. Specific energy

Test: Basic Concept - 3 - Question 5

 Match the following List-I (Thermometer) with  List -II ( Thermometric property)

Detailed Solution for Test: Basic Concept - 3 - Question 5

Test: Basic Concept - 3 - Question 6

 In a quasiequilibrium process, the pressure in a system

Test: Basic Concept - 3 - Question 7

Convert the following readings of pressure to kPa, assuming that the barometer reads 760mm of Hg and match  the List-I and List-II

Detailed Solution for Test: Basic Concept - 3 - Question 7

50 cm Hg vacuume:

80 cm Hg gauge:

1.2 m of H20 guage:

Test: Basic Concept - 3 - Question 8

Match the List-I (Terms) with List-ll (Description) and select the correct answer:

List-I
A. Change of state
B. Path
C. Process

List-ll
1. Succession of states
2. One or more properties changes
3. Change of state for specified path

Detailed Solution for Test: Basic Concept - 3 - Question 8

Properties are the coordinates to describe the state of a system. They are state variables of the system. Any operation in which one or more of the properties of a system changes is called a change of state. The succession of states passes through during a change of state is called the path of the change of state is called a process. A thermodynamic cycle is defined as a series of state changes such that the final state is identical with the initial state.

Test: Basic Concept - 3 - Question 9

Ice kept in a wail insulated thermo-flask is an example of which system?

Test: Basic Concept - 3 - Question 10

For an isolated system executing a process
1. no heat transfer takes place
2. no work is done
3. no mass crosses the boundary
4. no chemical reaction takes place within the system

Which of the above statement are correct?

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