165) The sensing element in the control system of nuclear reactors measure the __________ of the neutron flux in the reactor.

Answer is:

density

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166) If the temperature of intake air in internal combustion engine increases, then its efficiency will

Answer is:

decrease

167) In a coil ignition system of petrol engines, a condenser is connected across the contact-breaker in order to

prevent sparking across the gap between the points

cause more rapid break of the primary current, giving a higher voltage in the secondary circuit

prevent sparking across the gap between the points and cause more rapid break of the primary current, giving a higher voltage in the secondary circuit

none of these

Answer is:

prevent sparking across the gap between the points and cause more rapid break of the primary current, giving a higher voltage in the secondary circuit

168) Which of the following statement is correct regarding normal cetaine?

Answer is:

all ofthe above

169) Enriched uranium is required as a fuel in a nuclear reactor, if light water is used as moderator and coolant, because light water has

Answer is:

low moderating efficiency

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