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Directions to Solve

Find the correctly spelt words.

Q1: (solve as per the direction given above)

A Hindrence

B Hinderrance

C Hindrance

D Hinderence

Q2: A nuclear reactor is said to be critical when the neutron population in the reactor core is

A decreasing from the specified value

B rapidly increasing leading to the point of explosion

C reduced to zero

D constant

Q3: In diesel engines, the ignition takes place due to the heat produced in the engine cylinder at the end of compression.

A Correct

B Incorrect

Q4: The fuels in order of decreasing knock tendency for spark ignition engines are

A napthenes, aromatics, paraffins

B napthenes, paraffins, aromatics

C paraffins, aromatics, napthenes

D paraffins, napthenes, aromatics

Q5: The ratio of the work obtained at the crankshaft in a given time to the energy supplied during the same time is called

A mechanical efficiency

B volumetric efficiency

C overall efficiency

D indicated thermal efficiency

Q6: Plutonium (Pu239) is produced

A when U238 is irradiated by neutrons

B as basic raw material

C artificially

D by fission of Th232

Q7: A petrol engine has compression ratio from

A 25 to 40

B 6 to 10

C 15 to 25

D 10 to 15

Q8: In petrol engines, using a fixed octane rating fuel, the increase in engine speed will decrease the knocking tendency.

A No

B Yes

Q9: Materials which make good moderators do not make good reflectors.

A Correct

B Incorrect

Q10: The ignition of the charge by some hot surface within the engine before the passage of spark is called

A pre-ignition

B auto-ignition

C ignition delay

D detonation