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Directions to Solve

Find the correctly spelt words.

Q1: (solve as per the direction given above)

A Valnerable

B Velnerable

C Vulnerable

D Vulnarable

Q2: The reflectivity depends upon

A energy of neutrons

B properties of the reflector

C all of these

D geometry of the reflector

Q3: The indicated power for multi-cylinder engine will be same as that of a single cylinder engine.

A True

B False

Q4: In order to prevent knocking in spark ignition engines, the charge away from the spark plug should have

A low density

B low temperature

C long ignition delay

D all of these

Q5: The size of a reactor at which the chain reaction can be initiated (i.e. when system becomes critical) with just enough fissionable material (called critical mass of fuel) is known as critical size of reactor.

A Correct

B Incorrect

Q6: The mechanical efficiency (ηm) of the engine is given by

A

B none of these

C

D

Q7: A gas engine has a swept volume of 300 cm3 and clearance volume of 25 cm3. Its volumetric efficiency is 0.88 and mechanical efficiency is 0.90. The volume of the mixture taken in per stroke is

A 248 cm3

B 286 cm3

C 252 cm3

D 264 cm3

Q8: A supercharger receives air from the atmosphere surrounding the engine, compresses it to a higher pressure and then feeds it into the inlet valve of the engine.

A Incorrect

B Correct

Q9: Iso-octane (C8H18) has octane number of

A 0

B 100

C 50

D 120

Q10: The brake power is always greater than indicated power.

A Agree

B Disagree