Q. The point at which the resultant pressure on an immersed surface acts, is known as

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Q. A tank of uniform cross-sectional area (A) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to bring the liquid level from H1 to H2 will be

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Q. The torque required to overcome viscous resistance of a collar bearing is (where R1 and R2 = External and internal radius of collar)

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Q. The power transmitted through the nozzle is maximum when the head lost due to friction in the pipe is __________ of the total supply head.

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Q. In case of flow through parallel pipes,

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Q. The flow at critical depth in an open channel is called torrential flow.

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Q. The torque required to overcome viscous resistance of a footstep bearing is (where μ = Viscosity of the oil, N = Speed of the shaft, R = Radius of the shaft, and t = Thickness of the oil film)

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Q. Coefficient of velocity is defined as the ratio of

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Q. The mass of 2.5 m³ of a certain liquid is 2 tonnes. Its mass density is

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Q. The dynamic viscosity of the liquid __________ with rise in temperature.

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Q. When a vertical wall is subjected to pressures due to liquid on both sides, the resultant pressure is the __________ of the two pressures.

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Q. 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

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Q. When the Mach number is between __________ the flow is called super-sonic flow.

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Q. A glass tube of small diameter (d) is dipped in fluid. The height of rise or fall in the tube given by (where w = Specific weight of liquid, α = Angle of contact of the liquid surface, and σ = Surface tension)

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Q. An internal mouthpiece is said to be running free if the length of the mouthpiece is __________ the diameter of the orifice.

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Q. The discharge over a rectangular notch is

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Q. The volume of a fluid __________ as the pressure increases.

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Q. The pressure of the liquid flowing through the divergent portion of a venturimeter

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Q. The vacuum pressure can be measured with the help of a piezometer tube.

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Q. 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

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