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Directions to Solve

Find the correctly spelt words.

Q1: (solve as per the direction given above)

A Hinderrance

B Hindrance

C Hindrence

D Hinderence

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

A constant

B rapidly increasing leading to the point of explosion

C reduced to zero

D decreasing from the specified value

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, paraffins, aromatics

B paraffins, aromatics, napthenes

C napthenes, aromatics, paraffins

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 volumetric efficiency

B indicated thermal efficiency

C mechanical efficiency

D overall 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 10 to 15

C 6 to 10

D 15 to 25

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

A Yes

B No

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

A Incorrect

B Correct

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

A ignition delay

B pre-ignition

C detonation

D auto-ignition