fluid mechanics objective questions with answers part8

Q1. The value of the coefficient of compressibility for water at ordinary pressure and temperature in kg/cm is equal to
(A) 1200
(B) 2100
(C) 2700
(D) 21000

Q2. The increase of temperature results in
(A) increase in viscosity of gas
(B) increase in viscosity of liquid
(C) decrease in viscosity of gas
(D) decrease in viscosity of liquid

Q3. Surface tension has the units of
(A) ampere/m
(B) newton/kg
(C) newton/m
(D) newton

Q4. 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

Q5. The stress-strain relation of the newtoneon fluid is
(A) linear
(B) parabolic
(C) hyperbolic
(D) inverse type

Q6. The units of viscosity are
(A) metres2 per sec
(B) kg sec/metre
(C) newton-sec per metre2
(D) newton-sec per meter

Q7. Kinematic viscosity is dependent upon
(A) pressure
(B) distance
(C) flow
(D) density

Q8. Units of surface tension are
(A) energy/unit area
(B) distance
(C) both of the above
(D) it has no units

Q9. Which of the following meters is not associated with viscosity
(A) Red wood
(B) Say bolt
(C) Engler
(D) Orsat

Q10. 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

Q11. Choose the wrong statement. Alcohol is used in manometer, because
(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

Q12. The property of fluid by virtue of which it offers resistance to shear is called
(A) surface tension
(B) adhesion
(C) cohesion
(D) viscosity

Q13. Choose the wrong statement
(A) fluids are capable of flowing
(B) fluids conform to the shape of the containing vessels
(C) when in equilibrium, fluids cannot sustain tangential forces
(D) when in equilibrium, fluids can sustain shear forces

Q14. The density of water is 1000 kg/m3 at
(A) 0°C
(B) 0°K
(C) 4°C
(D) all temperatur

Q15. If w is the specific weight of liquid and k the depth of any point from the surface, then pressure intensity at that point will be
(A) h
(B) wh
(C) w/h
(D) h/w

Q16. Choose the wrong statement
(A) Viscosity of a fluid is that property which determines the amount of its resistance to a shearing force
(B) Viscosity is due primarily to interaction between fluid molecules
(C) Viscosity of liquids decreases with in-crease in temperature
(D) Viscosity of liquids is appreciably affected by change in pressure

Q17. The units of kinematic viscosity are
(A) metres2 per sec
(B) kg sec/metre
(C) newton-sec per metre
(D) newton-sec per metre

Q18. The ratio of absolute viscosity to mass density is known as
(A) specific viscosity
(B) viscosity index
(C) kinematic viscosity
(D) coefficient of viscosity

Q19. Which of the following is the unit of kinematic viscosity
(A) pascal
(B) poise
(C) stoke
(D) faraday

Q20. A one dimensional flow is one which
(A) is uniform flow
(B) is steady uniform flow
(C) takes place in straight lines
(D) involves zero transverse component of flow