1. Thermal treatment methods used to remove impurities like:
a) Dissolved carbon dioxide and other gases
b) Solid materials
c) Carbonate
d) Bacterial impurities
Explanation: Thermal treatment method involves distillation and derative heating of feed water. During distillation water is evaporated then condensed and collected. During derating heating water is broken up into fine droplets and heated to produced vapour within the deaerator. During these process carbon dioxide and other days of devices separated from feet water.
2. Heat treatment arrangement used to separate or remove deserved gases and impurities from feed water is called the year later.
a) True
b) False
Explanation: A deaerator is a device that is widely used for the removal of oxygen and other dissolved gases from the feedwater to steam-generating boilers. These gases make house corrosion scale formation
3. Chemical method of treatment is used for treatment of:
a) Diissolve gases
b) Carbonate and carbon dioxide
c) Bacterial impurities
d) Send and suspended materials
Explanation: Treatment involvs line treatment, soda treatment, lime and soda treatment. Zeolite treatment and demineralisation. Iime treatment is done for treatment of carbonate hardness, carbon dioxide in water. soda treatment is done for treatment of water containing non carbonate hardness and line soda treatment is used when both carbonate and none carbonate hardness for feed water.
4. Scall formation in boiler tube causes ____________
a) reduction of heat transfer and overheating of boiler tube
b) corrosion of boiler surface
c) feeling up of steam passage
d) cracks in the ages rivites
Explanation: Dissolved gases include oxygen and carbon dioxide which may lead to scale formation corrosion, carry over and imbrittlement in boiler and other apprature. Scale formation reduces the heat transmission through the heating surface.
5.The best capable alternative source which can meet the future energy demand is _____________
a) thermal power plant
b) nuclear power plant
c) hydroelectric power plant
d) geothermal power plant
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 demand, only nuclear power plants are capable of doing that.
6. How much coal is required to generate energy equivalent to the energy generated by 1 kg of uranium?
a) 30000 tonnes of high grade coal
b) 300 tonnes of high grade coal
c) 10000 tonnes of high grade coal
d) 3000 tonnes of high grade coal
Explanation: One of the main attention for nuclear fuel is the huge amount of energy that can be released from a small quantity of active nuclear fuel. The energy obtainable by completely using 1 kg of Uranium would give energy equivalent 3000 tons of high grade coal i.e. Uranium has three millions times the energy of coal.
7. Nuclear fuel in reactor lasts for ________________
a) more than 5 months
b) few weeks
c) few days
d) more than 5 years
Explanation: Very small amount of nuclear fuel can produce very high amount of energy. Nuclear fuel may remain in a reactor for more than 5 years.
8. Cost of nuclear fuel in nuclear power plant economics is considered as __________
a) running cost
b) maintenance cost
c) capital cost
d) development cost
Explanation: Nuclear fuel in a nuclear reactor may remain for more than 5 years. So the cost of fuel injected initially is taken as capital cost and may be a few crore rupees
9. In economics of nuclear power plant taxes and insurance charges are taken as _______
a) operating cost
b) maintenance cost
c) capital cost
d) fixed cost
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.
10. Which of the following are not taken as operation and maintenance cost in economics of nuclear power plant?
a) Taxes and insurance
b) Salaries and wages of staff
c) Cost of waste disposal
d) Cost of processing materials
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.