1) Hot wire anemometer is used to measure_______________? a. discharge b. velocity of gas c. pressure intensity of gas d. pressure intensity of liquid
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2) Density of water is maximum at ___________________? a. 0°C b. 0°K c. 4°C d. 100°C e. 20°C.
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3) Property of a fluid by which its own molecules are attracted is called ________________? a. adhesion b. cohesion c. viscosity d. compressibility e. surface tension
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4) The property of a fluid which enables it to resist tensile stress is known as________________? a. compressibility b. surface tension c. cohesion d. adhesion e. viscosity
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5) The specific weight of water is 1000 kg/m” _______________? a. at norma] pressure of 760 mm b. at 4°C temperature c. at mean sea level d. all the above e. none of the above.
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6) When the flow parameters at any given instant remain same at every point, then flow is said to be____________________? a. quasi static b. steady state c. laminar d. uniform e. static
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7) The normal stress in a fluid will be constant in all directions at a point only if_________________? a. it is incompressible b. it has uniform viscosity c. it has zero viscosity d. it is frictionless e. it is at rest
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8) An object having 10 kg mass weighs 9.81kg on a spring balance. The value of ‘g’ at this place is___________________? a. 10m/sec2 b. 9.81 m/sec2 c. 10.2/m sec d. 9.75 m/sec2 e. 9 m/sec
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9) The surface tension of mercury at normal temperature compared to that of water is____________________? a. more b. less c. same d. more or less depending on size of glass tube e. none of the above
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10) For very great pressures, viscosity of moss gases and liquids __________________? a. remains same b. increases c. decreases d. shows erratic behaviour e. none of the above
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11) Viscosity of water in comparison to mercury is ______________________? a. higher b. lower c. same d. higher/lower depending on temperature e. unpredictable
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12) The bulk modulus of elasticity __________________? a. has the dimensions of 1/pressure b. increases with pressure c. is large when fluid is more compressible d. is independent of pressure and viscosity e. is directly proportional to flow
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13) The value of the coefficient of compressibility for water at ordinary pressure and temperature in kg/cm is equal to _________________? a. 1000 b. 2100 c. 2700 d. 10,000 e. 21,000
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14) Surface tension _____________________? a. acts in the plane of the interface normal to any line in the surface b. is also known as capillarity c. is a function of the curvature of the interface d. decreases with fall in temperature e. has no units
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15) A liquid compressed in cylinder has a volume of 0.04 m3 at 50 kg/cm2 and a volume of 0.039 m3 at 150 kg/cm2. The bulk modulus of elasticity of liquid is _________________? a. 400 kg/cm2 b. 4000 kg/cm2 c. 40 x 105 kg/cm2 d. 40 x 106 kg/cm2 e. none of the above
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16) Units of surface tension are_________________? a. energy/unit area b. distance c. both of the above d. it has no units e. none of the above
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17) Choose the correct relationship_________________? a. specific gravity = gravity x density b. dynamicviscosity = kinematicviscosity x density c. gravity = specific gravity x density d. kinematicviscosity = dynamicviscosity x density e. hydrostaticforce = surface tension x gravity
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18) For manometer, a better liquid combination is one having______________? a. higher surface tension b. lower surface tension c. surface tension is no criterion d. high density and viscosity e. low density and viscosity
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19) Alcohol is used in manometer, because___________________?
Choose the wrong statement ? a. its vapour pressure is low b. it provides suitable meniscus for the inclined tube c. its density is less d. it provides longer length for a given pressure difference e. it provides accurate readings
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20) The property of fluid by virtue of which it offers resistance to shear is called____________________? a. surface tension b. adhesion c. cohesion d. viscosity e. all of the above
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