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Mock Test: SSC JE (ME)- 5 - Mechanical Engineering MCQ


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30 Questions MCQ Test Mechanical Engineering SSC JE (Technical) - Mock Test: SSC JE (ME)- 5

Mock Test: SSC JE (ME)- 5 for Mechanical Engineering 2024 is part of Mechanical Engineering SSC JE (Technical) preparation. The Mock Test: SSC JE (ME)- 5 questions and answers have been prepared according to the Mechanical Engineering exam syllabus.The Mock Test: SSC JE (ME)- 5 MCQs are made for Mechanical Engineering 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Mock Test: SSC JE (ME)- 5 below.
Solutions of Mock Test: SSC JE (ME)- 5 questions in English are available as part of our Mechanical Engineering SSC JE (Technical) for Mechanical Engineering & Mock Test: SSC JE (ME)- 5 solutions in Hindi for Mechanical Engineering SSC JE (Technical) course. Download more important topics, notes, lectures and mock test series for Mechanical Engineering Exam by signing up for free. Attempt Mock Test: SSC JE (ME)- 5 | 100 questions in 60 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
Mock Test: SSC JE (ME)- 5 - Question 1
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A system comprising of a pure substance executes reversibly a cycle 1-2-3-4-1 consisting
of two isentropic and two isochoric processes as shown in the 

 

Which one of the following is the correct representation of this cycle on the tempertureentropy
coordinates?

Mock Test: SSC JE (ME)- 5 - Question 2
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Match List-I (Process index 'n') with List-Ii (Ts traces) and select the correct answer using the
code given below the list

Detailed Solution for Mock Test: SSC JE (ME)- 5 - Question 2

To match the process indices with the T-s traces, we need to understand what each process index 'n' corresponds to in thermodynamic processes:

  • A process with n = 1 represents an isothermal process, where temperature remains constant. On a T-s diagram, this would be a horizontal line.
  • An index n = γ (gamma) typically represents an adiabatic process for an ideal gas, where γ is the ratio of specific heats (Cp/Cv). This is also an isentropic process since it is adiabatic and reversible, represented by a vertical line on the T-s diagram.
  • An index n = 1.4 could be specifically indicative of the adiabatic process for a diatomic gas (like air), where γ is approximately 1.4.
  • An index n = 1.0 might be a special case representing an isobaric process where pressure remains constant. On a T-s diagram, this would not be a horizontal line, as that represents isothermal. It would actually be a line with a positive slope since entropy increases with temperature at constant pressure.

Based on the T-s diagram provided:

  • Trace 1 could be isothermal (A), where temperature remains constant as entropy increases.
  • Trace 2 shows an increasing temperature with increasing entropy, which could indicate an isobaric process (B).
  • Trace 3 is a vertical line, which would represent an adiabatic/isentropic process where entropy remains constant (D).
  • Trace 4, which is not vertical but has a steep slope, could correspond to an adiabatic process with a specific γ (C), although in an actual T-s diagram, an adiabatic process for an ideal gas might appear as a curved line due to the relationship between entropy and temperature.

So, the matching would most likely be:
A - 3 (Isothermal process, trace 1)
B - 1 (Isobaric process, trace 2)
C - 2 (Adiabatic process with γ = 1.4, trace 4)
D - 4 (Adiabatic/isentropic process, trace 3)
From the options given:
(A) A-3, B-1, C-4, D-2
(B) A-2, B-1, C-4, D-3
(C) A-3, B-4, C-1, D-2
(D) A-2, B-4, C-1, D-3
The correct match would be option (A).

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Mock Test: SSC JE (ME)- 5 - Question 3
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Direction : Each of the next consists of two statements, one labelled as the 'Assertion (A)' and the other as 'Reason (R)'. You are to examine these two statements carefully and select the answers to these items using the codes given below:

Assertion (A): An air filled balloon released from the ground goes up and up till it reaches a certain elevation and floats in the air.
 

Reason (R): with increase in elevation the temperature of the atmospheric air increases and so the density decreases.

Mock Test: SSC JE (ME)- 5 - Question 4
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When a system is taken from state A to state B along the path A-C-B, 180 kJ of the heat flows into the system and it does 130 kJ of work (as shown in the figure below): 


How much heat will flow into the system along the path A-D-B if the work done by it along the path is 40 kJ?
Detailed Solution for Mock Test: SSC JE (ME)- 5 - Question 4

Mock Test: SSC JE (ME)- 5 - Question 5
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A system while undergoing a cycle A-B-C-D- A has the values of heat and work transfers as given
in the table

The power developed in kW is, nearly,
Detailed Solution for Mock Test: SSC JE (ME)- 5 - Question 5

Mock Test: SSC JE (ME)- 5 - Question 6
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In a throttling process, which one of the following parameters remains constant ?
Mock Test: SSC JE (ME)- 5 - Question 7
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At critical point the enthalpy of vaporization is
Mock Test: SSC JE (ME)- 5 - Question 8
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Joule-Thomson coefficient is defined as
Mock Test: SSC JE (ME)- 5 - Question 9
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The specific heat at constant volume is
Mock Test: SSC JE (ME)- 5 - Question 10
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When a system changes its state from one equilibrium state to another equilibrium state, thenthe path of successive states through which the system has passed, is known as
Mock Test: SSC JE (ME)- 5 - Question 11
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When the gas is cooled at constant pressure,
Mock Test: SSC JE (ME)- 5 - Question 12
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The polytropic index (n) is given by
Mock Test: SSC JE (ME)- 5 - Question 13
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In aqua-ammonia and Lithium -bromide water absorption refrigeration systems, the refrigerantsare respectively
Mock Test: SSC JE (ME)- 5 - Question 14
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The desirable property of a refrigerant is
Detailed Solution for Mock Test: SSC JE (ME)- 5 - Question 14

Physical Properties of Refrigerants

Low Condensing Pressure.
High Evaporator Pressure.
High Critical Pressure.
High Vapor Density.
High Dielectric strength.
High Latent Heat of Vaporization.
High Heat Transfer Coefficient.

Mock Test: SSC JE (ME)- 5 - Question 15
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The refrigerant used for absorption refrigerators working heat from solar collectors is mixture ofwater and
Mock Test: SSC JE (ME)- 5 - Question 16
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The maximum COP for the absorption cycle is given by (TG = generator temperature TC=environment temperature, TE= refrigerated space temperature)
Mock Test: SSC JE (ME)- 5 - Question 17
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The coefficient of performance of a refrigeration working on a reversed Carnot cycel is 4. Theratio of the highest absolute temperature to the lowest absolute temperature is
Detailed Solution for Mock Test: SSC JE (ME)- 5 - Question 17

Mock Test: SSC JE (ME)- 5 - Question 18
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In a petrol engine, the fuel supplied to the engine cylinder is mixed with required quanity of air andthe mixture is ignited with a
Mock Test: SSC JE (ME)- 5 - Question 19
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In a petrol engine, the mixture has the lowest pressure at the
Mock Test: SSC JE (ME)- 5 - Question 20
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The diameter of the cylindrical shell of a Lancashire boiler is about
 
Mock Test: SSC JE (ME)- 5 - Question 21
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The correct sequence of the given four cycles on T-s plane in figure 1, 2, 3, 4
(A) Rankine, Otto, Carnot and Diesel
(B) Rankine, Otto, Diesel and Carnot
(C) Otto, Rankine, Diesel and Carnot
(D) Otto, Rankine, Carnot and Diesel
Mock Test: SSC JE (ME)- 5 - Question 22
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The two reference fuels used for cetane rating are
Mock Test: SSC JE (ME)- 5 - Question 23
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The object of providing masked inlet valve in the air passes of compression ignition engines isto
Mock Test: SSC JE (ME)- 5 - Question 24
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List-I gives the different terms related to combustion while List-II gives the outcome of
the events that follows. Match List-I with List-II and select the correct answer using the codes given below the lists:
Mock Test: SSC JE (ME)- 5 - Question 25
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What is the main objective of supercharging of the engine?
Mock Test: SSC JE (ME)- 5 - Question 26
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Which of the following is boiler mounting?
Mock Test: SSC JE (ME)- 5 - Question 27
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Induced draught fans of a large steam generator have
Mock Test: SSC JE (ME)- 5 - Question 28
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Benson boiler is one of the high pressure boilers having
Mock Test: SSC JE (ME)- 5 - Question 29
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Which one of the following safety devices is used to protect the boiler when the water level fallsbelow a minimum level ?
Mock Test: SSC JE (ME)- 5 - Question 30
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A gas turbine works on which one of the following cycles?
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