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UNIT TEST-IT (2021-2022), , , , Class — VUIT", Science, (SET-1), Time: 30 min MM: 10 marks, Q1. Tick (\) the correct options: (1X 10=10), , (i) The decibel (dB) is a unit that measures, (a) Loudness (b) Pitch (c) frequency, , (ii) Applying grease to the moving parts of the machine, (a) Increase friction (b) Decrease friction —_(c) Increase force, (iii) Sound cannot travel through, (a) Solid (b) liquid (c) vacuum, (iv)Which of following is a contact force?, , (a) Muscular force (b) Magnetic force (c) Electrostatic force, (v)The maximum value of static friction is called, (a) Kinetic friction (b) limiting friction (c) sliding friction, (vi)The S.I. unit of force is, (a) Pascal (b) kilogram force (c) Newton, , (vii) Which of the following exerts greater friction?, , (a) Solid (b) liquid (c) gas, , (viii) The S.L. unit of frequency is, (a) Second (b) Hertz (c) metre, , (ix) Liquid pressure is measured with, (a) Manometer (b) Thermometer (c) Barometer, (x) An object is attracted towards the earth due to, (a) Muscular force (b) Magnetic force (c) Gravitational force, , KESTER SSAA