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Consider the following statements: 1. The chain reaction process is used in nuclear bombs to release a vast amount of energy, but in nuclear reactors, there is no chain reaction. 2. In a nuclear reactor, the reaction is controlled, while in nuclear bombs, the reaction is uncontrolled. 3. In a nuclear reactor, all operating reactors are ‘critical’, while there is no question of ‘criticality’ in case of a nuclear bomb. 4. Nuclear reactors do not use moderators, while nuclear bombs use them. Which of the above statements about operational principles of a nuclear reactor and a nuclear bomb is / are correct?
Consider the following statements.
1. The chain reaction process is used in nuclear bombs to release a vast amount of energy, but in nuclear reactors, there is no chain reaction.
2. In a nuclear reactor, the reaction is controlled, while in nuclear bombs, the reaction is uncontrolled.
3. In a nuclear reactor, all operating reactors are 'critical', while there is no question of 'critically' in case of a nuclear bomb.
4. Nuclear reactors do not use moderators, while nuclear bombs use them.
Which of the above statements about operational principles of a nuclear reactor and a nuclear bomb is/are correct?
Which of the following nuclear reactors is the most prone to radioactive hazards?
Nuclear wastes is waste that contains radioactive material. Radioactive material is normally a by product of nuclear power generation. Radioactive waste is regulated by government agencies in order to protect human health and the environment. Radioactivity naturally decays over time, so radioactive waste has to be isolated and confined in appropriate disposal facilities for a sufficient period until it no longer poses a threat. Which of the following statements can be inferred from the paragraph?
Which of the following statements are truel false?
1. Chemical hazards include dust or fumes, mists, vapours, and gases that are a result of chemical processes that takes place inside the industrial unit.
2. Chemical hazards include excessive levels of electromagnetic and ionizing radiations, noise, irregularities in temperature, air quality.
3. Ergonomic hazards rise because of repetitive stress or injuries caused due to different processes such as lifting, pushing, pulling etc.
4. Psychological hazards includes bullying at workplace by a senior, supervisor, manger, fellow or junior employee.
Which of the following statements are true?
1. All radioactive elements decay exponentially with time.
2. Half-life time of radioactive elements is the time required for one-half of the radioactive atoms to disintegrate.
3. Age of the earth can be determined by radioactive dating.
4. Half-life time of a radioactive element is fifty percent of its average life period.
Select the correct answer:
Which of the following statement is true? I. In homogeneous reactors the nuclear fuel and the moderator represents a uniform mixture in the fluid form. II. In heterogeneous reactors separate fuel sludge or roads are inserted in the moderator III. Most of the nuclear reactors used these days are of homogeneous type
Which of the following statement/(s) is/are true with regard to "Nuclear Fuel Cycle"? A. It is a series of industrial processes which involve the production of electricity from uranium in nuclear power reactors. B. The nuclear fuel cycles start with the mining of uranium and end with the disposal of nuclear waste. C. To prepare uranium for use in a nuclear reactor, it undergoes the steps of mining, milling, conversion, enrichment, and fuel fabrication. Choose the correct answer from the options given below:
Correct answer for the given blank out of the four alternatives.
The main failings were of conception and a political willingness to settle _________ easy options. _______________ the expansive declarationsof the need "to maintain effective security of all nuclear materials, _______________ includes nuclear materials used in nuclear weapons”, thesummits narrowed their _______________ to civilian holdings __________________ non­nuclear weapon states.
_______________ includes nuclear materials used in nuclear weapons”
The critical reasoning question is based on a short argument, a set of statements, or a plan of action. For each question, select the best answer of the choices given. Radioactive pollution is highly dangerous and has become a very important topic to be concerned about in today's scenario. Radioactive pollution is caused when radioactive byproducts of a nuclear reaction is dumped in the environment. This is contaminating the eco-system causing air, water and soil pollution. It can lead to cancer in humans when it comes in contact with the body. Given below are few options, select which isn't one of the effects of this on the humans.