QUESTIONS AND ANSWERS FLOW_INSTRUMENTATION

QUESTIONS AND ANSWERS FLOW_INSTRUMENTATION

A factor that influences measurement accuracy in magnetic flow meters is:

  1. Excessive fluid
  2. Signal distortion
  3. Temperature fluctuations
  4. Solids in the fluid

What does the magnetic flowmeter measure?

  1. Fluid velocity through the meter
  2. Density of the process fluid
  3. Specific gravity of the fluid
  4. Density, viscosity and specific gravity of the material

What is the relationship of voltage to the magnetic field and the velocity of the conductor?

  1. Voltage is inversely related to the magnetic field intensity and the conductor velocity
  2. Voltage is directly proportional to the magnetic field intensity and the conductor velocity
  3. Voltage is proportional to the magnetic field intensity only
  4. Voltage is proportional to the conductor velocity only

The best types of material to be used in the metering section should be:

  1. Metal
  2. Magnetic
  3. Nonmagnetic
  4. Nonporous

What name is given to the straight length of the pipe where the process fluid passes through the magnetic field?

  1. Electrode
  2. Conductor
  3. Faraday’s field
  4. Metering section

What type of problem is associated with using a magnetic flow meter?

  1. Signal distortion caused by noise
  2. Relatively high thermal conductivity
  3. Fluctuating heat capacity
  4. Sound waves or vibrations

What is a disadvantage associated with a magnetic flow meter?

  1. It can only measure specific Reynolds number profiles
  2. It can only be used to measure flow of conductive liquids
  3. It can only be used with low viscosity fluids
  4. You must shut down the process to use a magnetic flowmeter

Which of the following is compatible with a magnetic flow meter?

  1. Gas applications
  2. Ultrasonic systems
  3. Electronic control systems
  4. Flow measurement applications with low velocity fluid

A factor that has the largest influence on measurement accuracy in magnetic flow meters is:

  1. Slurries in the process fluid
  2. Variations in density
  3. The Reynolds number
  4. Coating of the electrodes

The Coriolis force is the result of:

  1. Volumetric flow rate
  2. Specific gravity
  3. Density of liquid
  4. Acceleration acting on a mass

Define mass.

  1. Mass is a measure of the quantity of matter
  2. Mass is a measure of the proximity of the molecules of a substance
  3. Mass is a measure of the density of a fluid
  4. Mass is a measure of how rapidly a substance flows

Which property has an affect on calculating the true mass flow rate of a substance?

  1. Viscosity
  2. Density
  3. Reynolds number
  4. Velocity

In a mass flow meter, what is the relationship between the sensing element and mass flow rate?

  1. Reaction of the sensing element is dependent upon the composition of the fluid
  2. The velocity and the density of the mass flow rate is proportional to the sensing element
  3. Reaction of a sensing element is proportional to the mass flow rate
  4. The mass flow rate must be a measure of the Reynold’s number profile

A factor that affects the measurement accuracy of mass flow rate is:

  1. Temperature of the process fluid
  2. Slurries in the process fluid
  3. The Reynolds number
  4. Variations in density

 

The effect of the earth’s rotation on a rising or falling mass is called:

  1. Coriolis effect
  2. Venturi effect
  3. Specific gravity
  4. Bernoulli’s law

Describe what effect a Coriolis force has on an object?

  1. The Coriolis acceleration pulls the object into the force
  2. The Coriolis acceleration pushes the object tangential to the force
  3. The Coriolis acceleration increases the object’s specific gravity
  4. The Coriolis acceleration raises the object’s temperature

The Coriolis Effect is produced by:

  1. Density
  2. Temperature
  3. Rotation
  4. Viscosity

How does the Coriolis force effect an object?

  1. Pulls the object toward the center of the gravitational core
  2. Pushes the object out from the center of the gravitational core
  3. Produces an increase in the flow rate
  4. Produces an acceleration of a mass

What is the name given to the area of a Coriolis flow meter that process fluid flows through?

  1. U-shaped tube
  2. Vortex shedder
  3. Elbow tap
  4. Orifice plate

Which component is responsible for vibrating the U-shaped tube as the process fluid flows through the open ends?

  1. Impeller
  2. Oscillator
  3. Pickup coil
  4. Wheatstone bridge

If fluid is flowing in opposite directions in the two arms of the tube:

  1. There is a difference in the fluid density that flows throughout the arms of the U-shaped tube
  2. There is a difference in the amount of fluid flowing throughout the arms of the U-shaped tube >
  3. The direction of the force will be exerted in opposite directions in both arms of the tube
  4. The direction of the force will be exerted in the same directions as in both arms of the tube

Component detects the amount of deflection?

  1. Oscillator
  2. U-shaped tube
  3. Concentric or eccentric orifice plate
  4. Optical or magnetic sensing device

What does a turbine flow meter use to prevent swirling fluid from entering the rotor?

  1. Secondary device
  2. Orifice plates
  3. Straightening vanes
  4. U-shaped tube

Which type of flow meter is most appropriate for small pipe sizes?

  1. Turbine
  2. Nutating disc
  3. Lobed impeller
  4. Oval gear

How does a turbine flowmeter measure the velocity of flow?

  1. Translating the linear motion of the fluid into rotational motion
  2. Translating the rotational motion of the fluid into linear motion
  3. By first determining the viscosity of the fluid to be laminar
  4. A turbine flow meter only measures flow that has a low temperature

How is flow rate recorded in a turbine flow meter?

  1. Electrical energy emitted from the pickup coils
  2. Electrical signal taken from the rotating blades
  3. Recording the change in pressure of the fluid
  4. By counting the specific amount of volume entering the inlet

What is the name of the component that is installed in the pipeline?

  1. Inlet-outlet tube
  2. Pickup coil
  3. Meter housing
  4. Straightening vane

Since turbine flow meters measure the flow rate by the reaction of the fluid on a propeller, what other factor needs to be considered?

  1. The Coriolis effect
  2. The volume of the fluid
  3. The temperature of the fluid
  4. The density of the fluid

How is flow rate recorded in a positive displacement flow meter?

  1. By counting the amount of volume entrapped by the flow meter
  2. Electrical energy emitted from the pickup coils
  3. Electrical signal taken from the rotating blades
  4. Recording the change in pressure of the fluid

Which component of the nutating disc flow meter is responsible for keeping track of the volume of fluid?

  1. Nutating disc
  2. Counter
  3. Inlet
  4. Counter drive pin

Which application is best suited for a nutating disc flow meter?

  1. Ultrasonic systems
  2. Gas applications
  3. Water meter for residences
  4. Flow measurement of slurries in mining operations

In a nutating disc flow meter, what causes the disc to turn?

  1. The opening of the meter outlet
  2. The rotation of the impeller vanes
  3. The vibration of the oscillator
  4. Fluid entering the inlet

Which of the following is an example of a positive displacement flow meter?

  1. Lobed impeller flowmeter
  2. Axial turbine flowmeter
  3. Coriolis flowmeter
  4. Vortex shedder

Fluid enters the inlet of the meter and causes the impeller of a lobed impeller flow meter to:

  1. Rotate in the same direction
  2. Rotate in opposite directions
  3. Rotate in a clockwise position
  4. Rotate in a counter-clockwise position

The rotation of the impellers in positive displacement flow meters creates:

  1. An Archimedes’ effect
  2. An ultrasonic flow
  3. A measuring chamber
  4. A Coriolis effect

How does a lobed impeller flow meter measure flow?

  1. By counting the number of revolutions of the impeller and doubling it
  2. By knowing the volume of the fluid entering and subtracting the number of revolutions of the impellers
  3. By measuring the Coriolis acceleration of the impellers
  4. By counting the number of revolutions of the impellers

Which of the following is a component of a vortex precession flowmeter?

  1. Swirl blades
  2. Bluff body
  3. Vortex generating element
  4. Transmitter

What is the name given to an obstruction positioned in a “flowing stream”?

  1. Bluff body
  2. Pickup coil
  3. Metering float
  4. Rota meter

 

How does the vortex shedding flow meter measure fluid flow?

  1. Counts the number of vortices created and divides by two
  2. Measures the effects produced by the vortices
  3. Counts the number of bluff bodies installed in the flow stream
  4. Measures the vortices upstream of the bluff body

What is the relationship between the frequency of the vortices and the fluid velocity?

  1. As the frequency increases, the fluid velocity decreases
  2. As the frequency decreases, the fluid velocity increases
  3. Frequency is directly proportional to the fluid velocity
  4. When a vortex is formed, fluid velocity increases and when a vortex is shed, fluid velocity decreases

Which component of the vortex shedding flow meter measures the pressure fluctuations?

  1. Shedder
  2. Transmitter
  3. Counter
  4. Sensor

In a vortex precession flow meter, which component forces the fluid into a swirl condition?

  1. Guide vanes
  2. Straightening vanes
  3. Transducer
  4. Sensor

In a vortex precession flow meter, which component detects and measures the frequency of the swirling precessions?

  1. Transmitter
  2. Sensor
  3. Swirl blades
  4. Straightening vanes

The helical path of vortex precession flow meters cause fluctuations in:

  1. Density and temperature
  2. Specific gravity and temperature
  3. Pressure and velocity
  4. Viscosity and density

What is the relationship between the frequency of the flow and the flow rate in a vortex precession flow meter?

  1. When a vortex is formed, fluid velocity increases; and, when a vortex is shed, fluid velocity decreases
  2. As frequency increases, the fluid velocity decreases
  3. As frequency decreases, the fluid velocity increases
  4. Frequency is directly proportional to the fluid velocity

 

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1 Response

  1. August 2, 2018

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