Instruction: The Question cum answer booklet contains 39 questions including sub question of match the following and main questions. 1. Due to heavy traffic near the school the department of traffic police wants to install automatic traffic lights. This am be done by using the Principle of a) Raman effect b) Radiography c) Holography d) Photoelectric effect 2. Water is to be sterilized for drinking purpose without using any chemicals this can be done by using a) u v rays b) visible light c) short wave length radio waves d) long wave length Radio waves 3. In a heat engine the linear motion of the Piston is converted into rotation by the component a) Spart plug b) Carburetor c) Crank Shaft d) Fuel injection pump 4. An Engineer wants to design an engine to convert 800 KJ of heat into 840KJ of useful mechanical work. The correct statement related to the above engine is that it a) Is less efficient b) Is more efficient c) Cannot be designed d) Is 100% efficient 5. An astrophysics observes that Galaxy “A” is more red shifted than galaxy “B”. The conclusion that can be frown from this is that a) The velocity of ‘A’ is more than ‘B’ b) The velocity of ‘B’ is more than ‘A’ c) Both the galaxies have equal velocity. d) Both the galaxies are at rest. 6. In a unclear reactor, the number of cadmium rods used are less than the required number. Then one of the possibilities is a) The reactor may explode b) The chain reaction stops c) Number of fissions decrease d) The number of neutrons decreases
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7. If emission test is required for an LPG run auto rickshaw, the availability of oxygen is moles for combustion of one mole of butane is a) Less than 5 b) Between 8.5 and 9.5 c) Between 9.5 and 10.5 d) More than 10.5 8. In a soap industry the chemist forgets to add sodium chloride during the manufacture of soap, The possible effect is a) Soap cannot be easily separated. b) Chemical composition of soap changes c)