MCQs of Conventional Generation, Load Curves and Tariffs (Power System - I - 3140914)

Power System - I (3140914) MCQs

MCQs of Conventional Generation, Load Curves and Tariffs

Showing 241 to 250 out of 425 Questions

241.

In the nuclear fission reactions, isotope of uranium used is

(a)	U₂₃₄
(b)	U₂₃₅
(c)	U₂₃₃
(d)	U₂₃₈

242.

When a nuclear reactor is operating at constant power the multiplication factor

(a)	Is equal to unity
(b)	Is less than unity
(c)	Is greater than unity
(d)	Any of above

243.

One fission of U₂₃₅ releases energy of

(a)	335 MeV
(b)	200 MeV
(c)	430 MeV
(d)	525 MeV

244.

Which of the following statements are correct?
1. Nuclear fission occurs whenever a uranium nucleus reacts with a neutron
2. Nuclear fission is accompanied by the release of neutrons and gamma rays
3. About 200 MeV of energy is released in the fission of a uranium nucleus
4. Energy from the fission of uranium nucleus is released mainly as the kinetic energy of the neutrons and the energy of gamma radiations

(a)	1, 2, 3 and 4
(b)	2 and 3
(c)	2, 3 and 4
(d)	1 and 4

245.

The operation of a nuclear reactor is controlled by controlling the multiplication factor (k), defined as, K = Number of neutrons of any one generation/Number of neutron of immediately preceding generation. The power level of the reactor can be increased by

(a)	Raising the value of k above 1 and keeping it at that raised value
(b)	Raising the value of k above 1, but later bringing it back to k = 1
(c)	Lowering the value of k below 1 and keeping at that lowered value
(d)	Lowering the value of k below 1, but later bringing it back to k = 1

246.

Critical mass of the fuel is the amount required to make the multiplication factor

(a)	Less than unity
(b)	More than unity
(c)	Equal to unity
(d)	0.5

247.

The power output of a nuclear power station is proportional to

(a)	Rate at which fission reaction occurs
(b)	Square root of the rat at which fission reaction occurs
(c)	Square of the rate at which fission reaction occurs
(d)	None of above

248.

The purpose of the moderator in a nuclear power plant is to

(a)	Control the flow of water inlet
(b)	Control the amount of nuclear fuel into the reactor
(c)	Control the nuclear fission or fission rate by slowing down the neutrons
(d)	Control the steam flow to the turbine

249.

The function of moderator in a nuclear reactor is

(a)	To absorb the excess neutrons
(b)	To increase the energy of the neutrons
(c)	To slow down the neutrons
(d)	None of above

250.

A moderator material should have

(a)	Small atomic mass
(b)	Large atomic mass
(c)	Either (a) or (b)
(d)	None of above

Showing 241 to 250 out of 425 Questions