85351. When the pressure intensity at a point is more than the local atmospheric pressure, then the difference of these two pressures is called
85352. The hammer blow in pipes occurs when
85353. When a body is placed over a liquid, it will sink down if
85354. A flow whose streamline is represented by a curve, is called
85355. When the Mach number is less than unity, the flow is called
85356. When the end contractions of the weir are suppressed, then number of end contractions (n) are taken as zero
85357. A flow is called hyper-sonic, if the Mach number is
85358. The intensity of pressure at any point, in a liquid, is
85359. If the depth of water in an open channel is greater than the critical depth, the flow is called
85360. A submerged body is said to be in a stable equilibrium, if its centre of gravity __________ the centre of buoyancy.
85361. The liquid used in manometers should have
85362. The viscosity of a liquid __________ its rate of flow through a hole in a vessel.
85363. The formula for discharge over a sharp-crested weir and Ogee weir is same as that of a rectangular weir
85364. The Cippoletti weir is a __________ weir.
85365. When a body is placed over a liquid, it will float if
85366. Gauge pressure at a point is equal to the absolute pressure __________ the atmospheric pressure.
85367. The pressure of a liquid measured with the help of a piezometer tube is
85368. The hydraulic gradient line lies over the centre line of the pipe by an amount equal to the
85369. The flow in a pipe or channel is said to be non-uniform when
85370. A flow whose streamline is represented by a straight line, is called __________ dimensional flow.
85371. The velocity at which the flow changes from laminar flow to turbulent flow is called
85372. The discharge through a channel of trapezoidal section is maximum when
85373. The vacuum pressure is always the negative gauge pressure.
85374. The value of coefficient of discharge is __________ the value of coefficient of velocity.
85375. When the water level on the downstream side of a weir is above the top surface of a weir, the weir is known as
85376. Reynold's number is the ratio of the inertia force to the
85377. A uniform body 3 m long, 2 m wide and 1 m deep floats in water. If the depth of immersion is 0.6 m, then the weight of the body is
85378. A weir is said to be narrow-crested weir, if the width of the crest of the weir is __________ half the height of water above the weir crest.
85379. The total pressure on an immersed surface inclined at an angle θ with the liquid surface is
85380. Turbulent flow takes place at high velocities.
85381. When a plate is immersed in a liquid parallel to the flow, it will be subjected to a pressure __________ that if the same plate is immersed perpendicular to the flow.
85382. The hydraulic mean depth for a circular pipe of diameter (d) is
85383. The tangential velocity of the water element having a free vortex is
85384. The unit of kinematic viscosity in S. I. units is
85385. A fluid whose viscosity does not change with the rate of deformation or shear strain is known as
85386. The variation in the volume of a liquid with the variation of pressure is called its
85387. The pressure measured with the help of a pressure gauge is called
85388. A venturiflume is used to measure
85389. The line of action of the force of buoyancy acts through the centre of gravity of the volume of the liquid displaced.
85390. The metacentric height is the distance between the
85391. An internal mouthpiece is said to be running free if the length of the mouthpiece is __________ the diameter of the orifice.
85392. The discharge over a rectangular notch is
85393. The volume of a fluid __________ as the pressure increases.
85394. The pressure of the liquid flowing through the divergent portion of a venturimeter
85395. The vacuum pressure can be measured with the help of a piezometer tube.
85396. A jet of water discharging from a 40 mm diameter orifice has a diameter of 32 mm at its vena contracta. The coefficient of contraction is
85397. A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. Which of the following statement is correct?
85398. Water is a __________ fluid.
85399. The celerity (velocity) of a pressure wave in a fluid is given by (where K = Bulk modulus, and ρ = Density of the fluid)
85400. The pressure intensity in kN/m2 (or kPa) at any point in a liquid is (where w = Specific weight of liquid, and h = Depth of liquid from the surface)
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