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The main body of reactor is called ____________
b Explanation: The reactor core, reflector and thermal shielding are all enclosed in the main body of reactor and is called reactor vessel or tank. It is strong walled container
b
See lessExplanation: The reactor core, reflector and thermal shielding are all enclosed in the
main body of reactor and is called reactor vessel or tank. It is strong walled container
Which of the following is the most essential requirement of control rod material?
c Explanation: The function of control rod is to control the rate of nuclear reaction by absorption extra release neutrons. Chain reaction is controlled either by removing or inserting neutron absorbing materials. The materials used for control rods must have very high absorption capacity for entranRead more
c
See lessExplanation: The function of control rod is to control the rate of nuclear reaction by
absorption extra release neutrons. Chain reaction is controlled either by removing or
inserting neutron absorbing materials. The materials used for control rods must have
very high absorption capacity for entrance.
The critical mass for U235 fission reaction is about _____________
d Explanation: For a chain reaction to occur the sample of the fissionable material should be large enough to capture the neutron internally. The minimum mass of fissionable material required to sustain a chain reaction is called the Critical Mass”. The critical mass varies for each reaction, for U2Read more
d
See lessExplanation: For a chain reaction to occur the sample of the fissionable material should
be large enough to capture the neutron internally. The minimum mass of fissionable
material required to sustain a chain reaction is called the Critical Mass”. The critical
mass varies for each reaction, for U235 fission reaction it is about 10 Kg
With respect to the load centre which location is suitable for stablishment of nuclear power plant?
b Explanation: These plants can be located near the load centre because of the negligible cost of transportation of fuel. But there should be a reasonable distance between the nuclear power plant and the nearest populated areas from point of view of safety against danger of radioactivity. It is highRead more
b
See lessExplanation: These plants can be located near the load centre because of the negligible
cost of transportation of fuel. But there should be a reasonable distance between the
nuclear power plant and the nearest populated areas from point of view of safety against
danger of radioactivity. It is highly undesirable to choose a site adjacent to chemical
industries oil refineries PWD works hospitals and schools.
Which of the following are not taken as operation and maintenance cost in economics of nuclear power plant?
a Explanation: Taxes and insurance are taken as fixed costs. Salaries and wages of operation and maintenance staff, cost of waste disposal and cost of processing materials are the operation and maintenance cost.
a
See lessExplanation: Taxes and insurance are taken as fixed costs. Salaries and wages of
operation and maintenance staff, cost of waste disposal and cost of processing
materials are the operation and maintenance cost.
In economics of nuclear power plant taxes and insurance charges are taken as _______
d Explanation: The life of reactor plant may be taken as between 15 to 20 years. For the other parts of the plant equipment the life may be taken as 30 years. The fixed cost would be interest, depreciation, taxes and insurance charges
d
See lessExplanation: The life of reactor plant may be taken as between 15 to 20 years. For the
other parts of the plant equipment the life may be taken as 30 years. The fixed cost
would be interest, depreciation, taxes and insurance charges
The best capable alternative source which can meet the future energy demand is _____________
b Explanation: Demand of electrical energy is increasing at fast rate owing to booming increase in the population and industrial growth. The reserves of fossil fuel i.e., coal, oil and gas are fast depleting. There are many alternative sources of energy but they are not enough to supply such huge deRead more
b
See lessExplanation: Demand of electrical energy is increasing at fast rate owing to booming
increase in the population and industrial growth. The reserves of fossil fuel i.e., coal, oil
and gas are fast depleting. There are many alternative sources of energy but they are
not enough to supply such huge demand, only nuclear power plants are capable of
doing that.
Which method is used in large modern thermal power plants to heat feed water?
c Explanation: Open and contact type haters are in small power plants. Such heaters recives steam from back pressure turbine. In large modern power plants heaters bleed steam from the main turbine and use it for heating of feed water.
c
See lessExplanation: Open and contact type haters are in small power plants. Such heaters
recives steam from back pressure turbine. In large modern power plants heaters bleed
steam from the main turbine and use it for heating of feed water.
Spread stockers can be employed for boiler capacitors of _________
d Explanation: In spreader stoker coal is fed from the coal hopper into the path of the rotor by means of a conveyor and rotor throws the coal into the furnace. Grate collects the ash and moves it out of the furnace
d
See lessExplanation: In spreader stoker coal is fed from the coal hopper into the path of the rotor
by means of a conveyor and rotor throws the coal into the furnace. Grate collects the
ash and moves it out of the furnace
In case of underfeed stokers fuel is supplied in the furnace ________
a Explanation: Mechanical stokers are of two types namely underfeed stokers and overfeed stokers. The two differ in manner of feeding of coal below or above the level at which primary air is admitted in the furnace. In case of underfeed stokers fuel is supplied into the furnace below the point of aiRead more
a
See lessExplanation: Mechanical stokers are of two types namely underfeed stokers and
overfeed stokers. The two differ in manner of feeding of coal below or above the level at
which primary air is admitted in the furnace. In case of underfeed stokers fuel is supplied
into the furnace below the point of air admission.
113. Which of the following is most