RRB-General Science-Quiz

1. What is the maximum limit of sound intensity in decibel units beyond which a human being cannot hear? (2)

1. 80 decibel
2. 85 decibel
3. 90 decibel
4. 95 decibel

2. Who proposed the ‘Wave Theory’ of light? (1)

1. Huygens
2. Albert Einstein
3. Isaac Newton
4. Thomas Edison

3. If a bar magnet is broken into two pieces, then (3)

1. one piece will have North Pole on both ends and other piece will have South Pole on both ends
2. only longer piece will behave as bar magnet
3. each piece will remain a magnet with North Pole at one end and South Pole at the other end
4. both pieces will lose their magnetism

4. Why does a corked bottle filled with water break when frozen (4)

1. glass is a bad conductor of heat
2. the bottle contracts on freezing
3. volume of water decreases on freezing
4. volume of water increases on freezing

5. Wood is the primary raw material for the manufacture of: (1)

1. paint
2. paper
3. ink
4. gun powder