978-0134891262 Test Bank Chapter 17

subject Type Homework Help
subject Pages 8
subject Words 2291
subject Authors NAPTA

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Process Technology Equipment, 2e (NAPTA)
Chapter 17 Filters and Dryers
1) Which of the following factors should be considered when selecting the appropriate filter?
A) Type of material being filtered
B) Size of particles to be removed
C) Degree of filtering required
D) All of the above
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2) What type of filter uses a strainer or cartridge to remove particles from the feed stream?
A) Gravity
B) Vacuum
C) Suction
D) Mechanical
3) What percent of particles can be removed with a nominal rating on a filter?
A) 50 percent
B) 58 percent
C) 85 percent
D) 99.9 percent
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4) How can you determine if the cartridge filter is full?
A) Refer to the indicator on the filter.
B) Look for a restricted process flow.
C) The differential pressure across the cartridge decreases.
D) A cartridge filter is self-cleaning and will not get full.
5) What type of filter uses a filter aid on a fine mesh screen to hold the filtered material?
A) Leaf filter
B) Rotary drum filter
C) Fixed bed filter
D) Plate-and-frame filters
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6) What type of filter uses a stationary filter medium in the filter unit?
A) Leaf filter
B) Rotary drum filter
C) Fixed bed filter
D) Plate-and-frame filters
7) What type of dryers use desiccants to remove moisture from the process stream?
A) Flash dryers
B) Fluid bed dryers
C) Fixed bed dryers
D) Rotary dryers
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8) What type of dryers use large, rotating, cylindrical tubes that reduce the moisture content of a
material by bringing it into direct contact with a heated gas?
A) Flash dryers
B) Fluid bed dryers
C) Fixed bed dryers
D) Rotary dryers
9) When does breakthrough occur in a dryer?
A) When corrosive materials move downstream
B) When the dryer output contains excessive moisture
C) When moisture is present in the instrument air system
D) When upstream equipment causes a problem in the dryer
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10) What does excessive fouling lead to?
A) Increase in flow rate
B) Decrease in differential pressure
C) Increase in differential pressure
D) Breakthrough
11) What can be done to prevent channeling?
A) Overpressurize the system.
B) Operate at lower temperature levels than recommended.
C) Operate at higher flows than recommended.
D) Ensure the correct drying agent is installed.
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12) What operational hazard can cause a dust explosion?
A) Breakthrough
B) Channeling
C) Fouling
D) Equipment leakage
13) Which of the following does NOT cause lost production?
A) Fouling
B) Breakthrough
C) Sampling without proper PPE
D) Channeling
14) Which of the following should a process technician monitor with regard to filters and dryers?
A) Look for excessive pressure drops.
B) Look for pools of liquid on the floor.
C) Look for leaks around the filter closure.
D) All of the above.
Bloom's: Understand
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15) What are used to document daily equipment and process operations?
A) Standard operating procedures
B) Training manuals
C) Process control systems
D) Clock-in/Clock-out systems

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