Test: Thermodynamics- 2


25 Questions MCQ Test Mechanical Engineering SSC JE (Technical) | Test: Thermodynamics- 2


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Attempt Test: Thermodynamics- 2 | 25 questions in 50 minutes | Mock test for Mechanical Engineering preparation | Free important questions MCQ to study Mechanical Engineering SSC JE (Technical) for Mechanical Engineering Exam | Download free PDF with solutions
QUESTION: 1

At critical point enthalpy of vaporizations is

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QUESTION: 2

A carnot engine is made to work on amonoatomic gas first (g = 1.67) and then on adia atomic gas (g = 1.4). Among the two whichwill have better efficiency

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QUESTION: 3

Two carnot engine are in series operatingbetween source temperature of 180º C and 20ºCsink temperature. If both produce equal amountof work the intermediated temperature is.

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QUESTION: 4

Which law of thermodynamics predicts the degree of completion of chemical reactions.

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QUESTION: 5

Entropy of the universe

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QUESTION: 6

Isentropic flow is always
1. zero increase in entropy flow.
2. revertrible adiabatic flow.
3. Frictionless reversible flow.

Solution:

In fluid dynamics, an isentropic flow is a fluid flow that is both adiabatic and reversible. That is, no heat is added to the flow, and no energy transformations occur due to friction or dissipative effects. For an isentropic flow, entropy density can vary between different streamlines.

QUESTION: 7

If the entropy of a system increases it means.

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QUESTION: 8

The energy of an isolated system is

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QUESTION: 9

Joule thomson coefficient is the slope of constantenthalpy lines in

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QUESTION: 10

With increase of pressure latent heat of steam

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QUESTION: 11

For a pure substance, the degree of freedom forsaturated vapour and superheated vapour are

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QUESTION: 12

At tripple point of water which of the followingcan be found.

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QUESTION: 13

The term which can differentiate thermodynamics from other sciences is ____.

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QUESTION: 14

When water is heated from 0º C its specificvolume will,

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QUESTION: 15

Which of the following is a pure substance
i. Gaseous combustion product
ii. Dry air
iii. Moist Air

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QUESTION: 16

During boiling vapour pressure is _______ toatmospheric pressure.

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QUESTION: 17

Change of state ex. freezing, melting, evaporationetc. are

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QUESTION: 18

First law of thermodynamics provides

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QUESTION: 19

A vessel of volume 1m3 contains oxygen(molecular weight = 32) at P = 1 bar and T = 47º C. The mass of oxygen in vessel is [R = 8314 J/mol-k]

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QUESTION: 20

As temperature increases values of Cp, Cv and g for polyatomic gas

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QUESTION: 21

For a free expansion process work done is

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QUESTION: 22

The heat transfer in a polytropic process can be given as.

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QUESTION: 23

The cyclic integral of (dQ - dw) is

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QUESTION: 24

The unit of temperature in S.I. units is

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QUESTION: 25

Which of the following is an extensive property.

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