Mechanical Engineering - IC Engines and Nuclear Power Plants

6.
In diesel engines, the ignition takes place due to the heat produced in the engine cylinder at the end of compression.
Correct
Incorrect
Answer: Option
Explanation:
No answer description is available. Let's discuss.

7.
The fuels in order of decreasing knock tendency for spark ignition engines are
paraffins, aromatics, napthenes
paraffins, napthenes, aromatics
napthenes, aromatics, paraffins
napthenes, paraffins, aromatics
Answer: Option
Explanation:
No answer description is available. Let's discuss.

8.
The ratio of the work obtained at the crankshaft in a given time to the energy supplied during the same time is called
mechanical efficiency
overall efficiency
indicated thermal efficiency
volumetric efficiency
Answer: Option
Explanation:
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9.
Plutonium (Pu239) is produced
artificially
by fission of Th232
when U238 is irradiated by neutrons
as basic raw material
Answer: Option
Explanation:
No answer description is available. Let's discuss.

10.
A petrol engine has compression ratio from
6 to 10
10 to 15
15 to 25
25 to 40
Answer: Option
Explanation:
No answer description is available. Let's discuss.