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Test: I.C. Engines- 1


25 Questions MCQ Test Mechanical Engineering SSC JE (Technical) | Test: I.C. Engines- 1


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Attempt Test: I.C. Engines- 1 | 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

If compression ratio of an engine working on Otto cycle is increased from 5 to 6, its air standard efficiency will increase by

Solution:
QUESTION: 2

In a diesel engine compression Ratio is 20 : 1.The temperature before and after heat addition at 500K and 1000K respectively, what is the expansion ratio ?

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QUESTION: 3

In a IC engine The ratio of Indicated work done to frictional losses is 4 : 3. The mechanical efficiency of the engine is

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QUESTION: 4

Mean effective pressure multiplied by swept volume per second gives.
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QUESTION: 5

Thermal efficiency of an Diesel cycle is given by

r = Compression ratio
r = Cut off ratio
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QUESTION: 6

Morse test is conducted on.
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QUESTION: 7

In diesel engine delay period means.
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QUESTION: 8

In S.I. engines supercharging will.
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QUESTION: 9

In C.I. engines injection advance makes knocking
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QUESTION: 10

A S. I. engine working on C.N.G does not require the following part.
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QUESTION: 11

For a 6- cylinder engine for evenness of torque firing order is
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QUESTION: 12

The ctance number of a mixure containing 60% ISO octane and 40% n - heptane is .
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QUESTION: 13

With increase in temperature of intake air, I.C. engine efficiency.
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QUESTION: 14

Which of the following engines deve lops maximum brake power
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QUESTION: 15

For same compression ratio and for same heat added
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QUESTION: 16

Piston compression rings are made of which of the following
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QUESTION: 17

Knocking tendency in SI engine reduces with increase in
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QUESTION: 18

The maximum limit of air fuel ratio for petrol is
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QUESTION: 19

Knocking in C.I. engine occurs during which stage of combustion.
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QUESTION: 20

In CI engine the Air fuel mixure is
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QUESTION: 21

The area inside an indicator diagram represents
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QUESTION: 22

The relationship between swept volume (Vs) clearance volume (Vc) and compression ratio (r) is
Solution:

For calculating compression ratio you should know the swept volume and clearance volume of the engine cylinder. Then you can use the relation,

  r= 1+(Vs/Vc).

Where, r- compression ratio, Vs- Swept Volume and Vc- Clearance Volume.

QUESTION: 23

Octane no. of a fuel can be increased by adding
Solution:
QUESTION: 24

Methane burns with stoichiometric quantity of a air. The air fuel ratio by weight is
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QUESTION: 25

For determining ignition quality of CI engines The reference fuel used are:
Solution:
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