85401. The hydraulic gradient line is always parallel to the centre line of the pipe.
85402. Barometer is used to measure
85403. A closed tank is completely filled with an oil. If it is made to move with a horizontal acceleration, then the pressure at the back end will be more than that at the front end.
85404. The mass of 2.5 m3 of a certain liquid is 2 tonnes. Its mass density is
85405. The dynamic viscosity of the liquid __________ with rise in temperature.
85406. When a vertical wall is subjected to pressures due to liquid on both sides, the resultant pressure is the __________ of the two pressures.
85407. The increase in pressure at the outer edge of a drum of radius (r) completely filled up with liquid of density (ρ) and rotating at (ω) rad/s is
85408. When the Mach number is between __________ the flow is called super-sonic flow.
85409. The property of a liquid which controls its rate of flow is called viscosity.
85410. The kinematic viscosity of an oil (in stokes) whose specific gravity is 0.95 and viscosity 0.011 poise, is
85411. The factional resistance of a pipe varies approximately with __________ of the liquid.
85412. If the coefficient of discharge is 0.6, then the discharge over a right angled notch is
85413. According to Bazin, the coefficient of discharge varies with the height of water over the sill of a weir.
85414. The product of mass and accelaration of flowing liquid is called
85415. The discharge through a wholly drowned orifice is given by (where H1 = Height of water (on the upstream side) above the top of the orifice, H2 = Height of water (on the downstream side) above the bottom of the orifice, and H = Difference between two water levels on either side of the orifice)
85416. If the value of coefficient of discharge increases, the discharge through the orifice decreases.
85417. A point, in a compressible flow where the velocity of fluid is zero, is called
85418. Falling drops of water become spheres due to the property of
85419. The D-Alembert's principle is used for changing the dynamic equilibrium of a fluid mass, into a static equilibrium.
85420. Whenever a plate is held immersed at some angle with the direction of flow of the liquid, it is subjected to some pressure. The component of this pressure, in the direction of flow of the liquid, is known as
85421. The height of a water column equivalent to a pressure of 0.15 MPa is
85422. The total energy of a liquid particle in motion is equal to
85423. The power transmitted through the nozzle is maximum when the head lost due to friction in the pipe is __________ of the total supply head.
85424. In case of flow through parallel pipes,
85425. The flow at critical depth in an open channel is called torrential flow.
85426. Coefficient of velocity is defined as the ratio of
85427. A differential manometer is used to measure
85428. The metacentric height of a ship is 0.6 m and the radius of gyration is 4 m. The time of rolling of a ship is
85429. The point at which the resultant pressure on an immersed surface acts, is known as
85430. A notch is used to measure __________ of liquids.
85431. A flow is called sonic, if the Mach number is unity.
85432. An error of 1% in measuring head over the crest of the notch (H) will produce an error of __________ in discharge over a triangular notch,
85433. A flow through a long pipe at decreasing rate is called __________ uniform flow.
85434. The surface tension of mercury at normal temperature is __________ that of water.
85435. The property of a liquid which enables it to resist tensile stress is called its surface tension.
85436. The magnitude of water hammer depends upon the
85437. The discharge over the trapezoidal notch is equal to the discharge over the rectangular notch __________ the discharge over the triangular notch.
85438. The dynamic viscosity of gases __________ with rise in temperature.
85439. A flow in which the quantity of liquid flowing per second is constant, is called __________ flow.
85440. The coefficient of venturifiume, generally, lies between
85441. Venturimeter is used to
85442. A hemispherical tank of radius (R) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to lower the level of liquid from (H1) to (H2) will be
85443. A flow is called super-sonic if the
85444. The force present in a moving liquid is
85445. The most efficient section of a channel is
85446. The ratio of the inertia force to the elastic force is called
85447. An opening in the side of a tank or vessel such that the liquid surface with the tank is below the top edge of the opening, is called
85448. The velocity of the liquid flowing through the divergent portion of a venturimeter
85449. In a broad-crested weir, the discharge is maximum if the head of water on the downstream side of weir is __________ the head of water on the upstream side of weir.
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