Everyday Science Multiple Choice Questions
42) A slow-running pendulum can be speeded by?
(a) Increasing the length of the rod
(b) Increasing the weight of bob
(c) Reducing the length of the rod
(d) Reducing the weight of bob
44) The approximate intensity level of sound which can cause damage to the ear drum is
(a) 20 dB
(b) 60 dB
(c) 100 dB
(d) 160 dB
46) Which one of the following is the main culprit in the thinning of Ozone layer in the earth's stratosphere?
(a) Carbon dioxide
(b) Chlorofluorocarbons
(c) Nitrogen oxides
(d) Methane
48) The property by virtue of which metals can be beaten into thin sheets is known as
(a) Ductility
(b) Malleability
(c) Conductivity
(d) Density




50) A tight-rope walker carries a long pole which he holds across his body. The purpose of this pole is to
(a) Prop him up if he falls
(b) Spread out his weight and reduce the pressure on the rope
(c) Add extra weight to keep the rope tightly stretched
(d) To keep the centre of gravity always vertically above the rope






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