SawaalBoxसवाल बॉक्स

Energy & Environment

49 questions in Science & Technology.

Asked in 2011, 2010, 2009, 2008, 2007, 2006, 2005, 2004, 2001, 2000, 1999, 1998, 1997, 1996, 1995

2011 · Q64Science & TechnologyEnergy & Environmentmoderate

What is the difference between a CFL and an LED lamp? 1. To produce light, a CFL uses mercury vapour and phosphor while an LED lamp uses semi-conductor material. 2. The average life span of a CFL is much longer than that of an LED lamp. 3. A CFL is less energy-efficient as compared to an LED lamp. Which of the statements given above is/are correct?

  1. (a)1 only
  2. (b)2 and 3 only
  3. (c)1 and 3 only
  4. (d)1, 2 and 3
Show answerHide answer

Official answer(c) 1 and 3 only

2006 · Q28Science & TechnologyEnergy & Environmentmoderate

In which one of the following areas did the Indira Gandhi Center for Atomic Research make significant progress in the year 2005?

  1. (a)Re-processing the uranium-plutonium mixed carbide fuel of the Fast Breeder Test Reactor
  2. (b)New applications of radio-isotopes in metallurgy
  3. (c)A new technology for production of heavy water
  4. (d)A new technology for high-level nuclear waste management
Show answerHide answer

Official answer(a) Re-processing the uranium-plutonium mixed carbide fuel of the Fast Breeder Test Reactor

2005 · Q88Science & TechnologyEnergy & Environmenteasy

Assertion (A): The main constituent of the Liquefied Petroleum Gas is methane. Reason (R): Methane can be used directly for burning in homes and factories where it can be supplied through pipelines.

  1. (a)Both A and R are individually true and R is the correct explanation of A
  2. (b)Both A and R are individually true but R is not the correct explanation of A
  3. (c)A is true but R is false
  4. (d)A is false but R is true
Show answerHide answer

Official answer(d) A is false but R is true

2004 · Q92Science & TechnologyEnergy & Environmentmoderate

Consider the following statements: 1. Indira Gandhi Centre for Atomic Research uses fast reactor technology. 2. Atomic Minerals Directorate for Research and Exploration is engaged in heavy water production. 3. Indian Rare Earths Limited is engaged in the manufacture of Zircon for India's nuclear programme beside other rare earth products. Which of these statements given above are correct?

  1. (a)1, 2 and 3
  2. (b)1 and 2
  3. (c)1 and 3
  4. (d)2 and 3
Show answerHide answer

Official answer(c) 1 and 3

2001 · Q106Science & TechnologyEnergy & Environmentmoderate

Consider the following statements: In a nuclear reactor, self-sustained chain reaction is possible, because I. More neutrons are released in each of the fission reactions. II. The neutrons immediately take part in the fission process. III. The fast neutrons are slowed down by Graphite. IV. Every neutron released in the fission reaction initiates further fission. Which of these statements are correct?

  1. (a)I, II and III
  2. (b)I and III
  3. (c)II and IV
  4. (d)II, III and IV
Show answerHide answer

Official answer(b) I and III

1996 · Q123Science & TechnologyEnergy & Environmentmoderate

Consider the following statements: At the present level of technology available in India, solar energy can be conveniently used to I. Supply hot water to residential buildings. II. Supply water for minor irrigation projects. III. Provide street lighting. IV. Electrify a cluster of villages and small towns. Of these statements

  1. (a)I, II, III and IV are correct
  2. (b)I and IV are correct
  3. (c)I and III are correct
  4. (d)I, II and III are correct
Show answerHide answer

Official answer(d) I, II and III are correct

1995 · Q116Science & TechnologyEnergy & Environmenteasy

The difference between a nuclear reactor and an atomic bomb is that

  1. (a)no chain reaction takes place in nuclear reactor while in the atomic bomb there is a chain reaction
  2. (b)the chain reaction in nuclear reactor is controlled
  3. (c)the chain reaction in nuclear reactor is not controlled
  4. (d)no chain reaction takes place in atomic bomb while it takes place in nuclear reactor
Show answerHide answer

Official answer(b) the chain reaction in nuclear reactor is controlled