Here is the list of different Interview Questions on Flow Measurement Devices or on flow measurement.
Flow Measurement Devices
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List the different units of flow.
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Define mass flow rate.
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What is meant by variable area flow meter ?
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Water is pumped through a 150 mm diameter pipe with a flow velocity of 3.5 m/sec. Find
the volume flow rate and the weight flow rate. The density of water is 1000 kg/m3. -
An incompressible fluid is flowing through an orifice plate with a flow coefficient of 0.5,
causing a pressure drop of 500 mm. Calculate the fluid velocity. -
Explain the flow measurement by orifice plate with the help of a sketch giving the installation details.
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Does the venacontracta position change in fluid flow line with change in fluid flow rate ?
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When is a Venturi tube preferable to orifice plate ?
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A pitot tube with coefficient of 0.93 is used to measure the velocity of air in a pipe. The
measured differential pressure is 300 mm. What is the velocity of air in the pipe ? -
Explain the advantages and disadvantages of the three main types of orifice plates.
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Discuss the basic principle used in positive-displacement flow meters to measure fluid
flow. -
An incompressible fluid is flowing in a 100 mm pipe under a pressure head of 1.5 kg/
cm2. Calculate the fluid velocity and volume flow rate. -
Explain in detail the operation of rotary-vane, oval-gear and nutating disk PD flow
meters. -
What is meant by inferential flow meters ?
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What are the types of inferential flow meters ?
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Explain about target flow meters.
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What is the principle of turbine flow meter ?
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Does the operation of the turbine flow meter depend on liquid characteristics ?
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Will you recommend DC supply to the electromagnet of a magnetic flow meter
carrying mercury ? -
Which flow meters are preferable for the measurement of flow of corrosive liquids ?
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What is the concept of cross-correlation flow meter ?
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How will you measure the flow rate of solids ?
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An incompressible fluid is flowing in a 300 mm pipe under a pressure head of 2.5 kg/
cm2. Calculate the fluid velocity and volume flow rate. -
How will you measure the mass flow rate ?
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What are the types of mass flow meters ?
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State the features of ‘coriolis’ mass flow meters.
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What is ‘Vortex’ ?
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What is a flow switch ?
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What are the types of flow switches ?
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What is the principle of hot-wire anemometers ?
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Explain the two types of hot wire anemometers.
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Explain the types of mechanical anemometers.
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Explain the principle of thermal mass flow meters.
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Explain the excitation schemes of an electro magnetic flow meter.
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Explain the principle of operations of an electromagnetic flow meter. Discuss its merits.
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In an ultrasonic flow meter, the beat frequency is 805 cps, the angle (θ) between the
transmitters and receivers is 45°, and the sound path is 125 mm. Calculate the fluid
velocity in m/sec. -
Which type of flow meter can be used to calibrate other flow meters ?
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State the types of calibration methods available for gas flow measurement.
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Write short notes on flow regulators.
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Briefly explain about the selection of a flow meter