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WorksheetsDay 31-Oct 20-Diploma-worksheet-Fluid dynamics
Total questions: 15
Worksheet time: 10mins
The major reason why venturimeter has the highest coefficient of discharge among all flow meters is —
Throat is longest
No energy conversion occurs
Pressure recovery in diffuser is maximum
Velocity fluctuation is maximum
The float in a rotameter reaches equilibrium when —
Buoyant force = weight of fluid
Drag force = inertia force
Drag + buoyancy = weight of float
Static head = stagnation head
For measurement in open channels, which device becomes unsuitable?
Pitot tube
Venturimeter
Current meter
None
Vena-contracta occurs at a section where the………..is maximum and ……………….. is minimum.
(a)
In rotameter, the tube is tapered in the (a) direction.
Euler’s equation is obtained from Newton’s 2nd law by neglecting (a) forces
Venturimeter cannot be used in open channels due to absence of full pipe flow
True
False
The ……………of a venturimeter is designed to minimize separation and energy loss
(a)
In nozzle meter, pressure recovery is poorer than venturimeter.Is this statement true?
(a)
The …………. in a pitot tube has zero velocity
(a)
A pitot-static tube indicates stagnation head = 7.5 m and static head = 6.5 m. If Cv = 0.98, the velocity of flow is:
(a)
A pitot tube measures air flow. If water manometer difference = 15 mm and density of air = 1.2 kg/m³, find velocity.
(a)
Which gives larger manometric head for same discharge — orifice meter or venturimeter?
(a)
“Measurement depends on balancing drag force against buoyancy force until equilibrium” —
Name the instrument
(a)
Which instruments rely on Bernoulli + continuity together?
Venturimeter
Orifice meter
Rotameter
None
