1. The rise or depression of liquid in a tube due to surface tension increase in size of tube will (a) increase (b) remain unaffected (c) may increase or decrease depending on the characteristics of liquid (d) decrease (e) unpred…
1. The capillary rise at 20°C in a clean glass tube of 1 mm bore containing water is approximately (a) 1 mm (b) 5 mm (c) 10 mm (d) 20 mm (e) 30 mm. Ans: e 2. The difference of pressure between the inside and outside of a liquid d…
1. The conditions for the stable equilibrium of a floating body are (a) the meta-center should lie above the center of gravity (b) the center of buoyancy and the center of gravity must lie on the same vertical line (c) a righting…
1. If 850 kg liquid occupies volume of one cubic meter, men 0.85 represents its (a) specific weight (b) specific mass (c) specific gravity (d) specific density (e) none of the above. Ans: c 2. Free surface of a liquid tends to co…
1. 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 (e) h/wh. Ans: b 2. Choose the wrong statement (a) Viscosity of a …
1. Which of the following meters is not associated with viscosity (a) Red wood (b) Say bolt (c) Engler (d) Orsat (e) none of the above. Ans: d 2. Choose the correct relationship (a) specific gravity = gravity x density (b) dynami…
1. A balloon lifting in air follows the following principle (a) law of gravitation (b) Archimedes principle (c) principle of buoyancy (d) all of the above (e) continuity equation. Ans: d 2. The value of the coefficient of compres…
1. The pressure at a point in a fluid will not be same in all the directions when the fluid is (a) moving (b) viscous (c) viscous and static (d) inviscous and moving (e) viscous and moving. Ans: e 2. An object having 10 kg mass w…
1. The value of mass density in kgsecVm4 for water at 0°C is (a) 1 (b) 1000 (c) 100 (d) 101.9 (e) 91 Ans: d 2. Property of a fluid by which its own molecules are attracted is called (a) adhesion (b) cohesion (c) viscosity (d) com…
1. Fluid is a substance that (a) cannot be subjected to shear forces (b) always expands until it fills any container (c) has the same shear stress at a point regardless of its motion (d) cannot remain at rest under action of any…
1. The length of a pipe is 1 km and its diameter is 20 cm. If the diameter of an equivalent pipe is 40 cm, then its length is a) 32 km b) 20 km c) 8 km d) 4 km Ans: a 2. Two pipes of same length and diameters d and 2d respective…
1. The wake a) always occurs before a separation point b) always occurs after a separation point c) is a region of high pressure intensity d) none of the above Ans: b 2. The maximum thickness of boundary layer in a pipe of radiu…
1. The value of friction factor ‘f’ for smooth pipes for Reynolds number 106 is approximately equal to a) 0.1 b) 0.01 c) 0.001 d) 0.0001 Ans: b 2. For laminar flow in a pipe of circular cross-section, the Darcy’s friction factor…
1. Stanton diagram is a a) log-log plot of friction factor against Reynolds number b) log-log plot of relative roughness against Reynolds number c) semi-log plot of friction factor against Reynolds number d) semi-log plot of fri…
1. Coefficient of discharge for a totally submerged orifice as compared to that for an orifice discharging free is a) slightly less b) slightly more c) nearly half d) equal Ans: a 2. The major loss of energy in long pipes is due…
1. Which of the following is used to measure the discharge ? a) current meter b) venturimeter c) pitot tube d) hotwire anemometer Ans: b 2. Select the incorrect statement. a) The pressure intensity at vena contracta is atmospher…
1. The continuity equation pi V,A,= p2V2A2 is based on the following assumption regarding flow of fluid a) steady flow b) uniform flow c) incompressible flow d) frictionless flow where pi and p2 are mass densities. Ans: a 2. Whi…
1. A right circular cylinder open at the top is filled with liquid and rotated about its vertical axis at such a speed that half the liquid spills out, then the pressure intensity at the center of bottom is a) zero b) one-fourth…
1. Centre of buoyancy always a) coincides with the centre of gravity b) coincides with the centroid of the volume of fluid displaced c) remains above the centre of gravity d) remains below the centre of gravity Ans: b 2. If the …
1. Pascal-second is the unit of a) pressure b) kinematic viscosity c) dynamic viscosity d) surface tension Ans: c 2. An ideal fluid is a) one which obeys Newton’s law of viscosity b) frictionless and incompressible c) very visco…
