CHE 220 quiz 7

Water at 20°C is flowing in a 2-in. schedule 40 steel pipe. Its flow rate is measured by a venturi meter having a throat diameter of 20 mm. The manometer reading is 214 mm of mercury. The venturi coefficient is 0.98. Calculate the flow rate.
THREE Decimal places and don't forget the units in L/s

d=4 in.

h=15 in.

SG oil= 0.84

Oil viscosity=65 cP

What is the velocity?

The answer must be in 2 decimal places and unties must be in SI

Which of the following statements about the venturi meter is TRUE?

• A. It has a large permanent pressure loss due to friction.

• B. It is less expensive and more compact than the orifice meter.

• C. It operates based on pressure difference and changes in cross-sectional area.

Compare and contrast the venturi meter and the orifice meter in terms of cost, pressure loss, and accuracy. When would you prefer one over the other?

Which of the following flow meters directly measures mass flow rate?

• A. Rotameter

• B. Turbine meter

• C. Coriolis meter

• D. Orifice meter

In a venturi meter, the throat is used to:

• A. Increase pressure

• B. Measure temperature

• C. Reduce cross-sectional area and increase velocity

• D. Control the valve opening