978-0134891262 Test Bank Chapter 7

subject Type Homework Help
subject Pages 9
subject Words 3138
subject Authors NAPTA

Unlock document.

This document is partially blurred.
Unlock all pages and 1 million more documents.
Get Access
page-pf1
1
Process Technology Equipment, 2e (NAPTA)
Chapter 7 Compressors
1) Which of the following should be considered when selecting a type of compressor?
A) Viscosity
B) Discharge pressure
C) Type of liquid being compressed
D) All of the above
2) How is flow rate expressed?
A) Kilopascals (kPa)
B) Milliliters per second (mps)
C) Cubic feet per minute (cfm)
D) Pounds per square inch (psi)
page-pf2
2
3) Why are dynamic compressors more commonly used than positive displacement compressors?
A) They are more sophisticated.
B) Multiple fuel types can be utilized.
C) They have a smaller capacity.
4) What dynamic compressors allow the gas to flow from the inlet, located near the suction eye,
to the outer tip of the impeller blade?
A) Axial compressors
B) Rotary compressors
C) Centrifugal compressors
D) Reciprocating compressors
page-pf3
3
5) What type of compressor would you use if you needed a compressor for continuous-duty
applications that require high volumes but relatively low pressures?
A) Axial compressor
B) Centrifugal compressor
C) Rotary compressor
6) What is the compression ratio of a compressor with a suction pressure of 800 psiA and a
discharge pressure of 1600 psiA?
A) 1.5
B) 2
C) 2.5
D) 3
page-pf4
4
7) What compressors use a back-and-forth or up-and-down motion to pressurize and move gas
through the device?
A) Axial compressors
B) Rotary compressors
C) Centrifugal compressors
D) Reciprocating compressors
8) What type of compressor would you use in applications where the operating conditions
(flow/pressure) vary greatly?
A) Axial compressor
B) Centrifugal compressor
C) Rotary compressor
D) Reciprocating compressor
page-pf5
5
9) What happens to a dynamic compressor when the volume of gas entering the compressor
drops below a critical flow rate?
A) It may stall.
B) It will operate more efficiently.
C) It is compressing dirty gas.
D) It will increase the temperature of the gas.
10) What can be an indicator of surging in a compressor?
A) The compressor will stall.
B) The compressor will vibrate severely.
C) The compressor will be compressing dirty gas.
D) The compressor will shut off.
page-pf6
6
11) What happens to the bearings and seals when gases are compressed?
A) They become cooler.
B) They become hotter.
C) They wear quicker.
D) They become loose.
12) What auxiliary system circulates and cools the sealing and lubricating oils?
A) Seal system
B) Separators
C) Lubrication system
D) Coolers
page-pf7
7
13) What type of seal is designed to restrict flow by requiring the fluid to pass through a series of
ridges and intricate paths?
A) Packing
B) Dry carbon rings
C) Liquid buffered seal
14) What antisurge device controls the discharge pressure?
A) Precooler
B) Variable speed driver
C) Minimum flow recycle device
D) Automatic shutdown indicator
page-pf8
8
15) What can occur if the valves associated with the compressor are incorrectly closed or
blocked?
A) Vibration
B) Overheating
C) Overpressurization
D) Surging
16) What can be caused by a loss of cooling?
A) Vibration
B) Overheating
C) Overpressurization
D) Surging
page-pf9
9
17) What can cause loss of capacity in a compressor?
A) Incorrectly closed valves
B) Piping pulsation
C) Leaking compression valves
D) Misaligned shaft
18) Which of the following is a personal safety hazard associated with compressors?
A) Skin burns
B) Chemical exposure
C) Excessive noise levels
D) All of the above
page-pfa
10
19) Which of the following is an equipment hazard associated with compressors?
A) Electric shock
B) Cold working conditions
C) Exposure to hazardous materials
D) All of the above
20) Which of the following is an environmental hazard associated with compressors?
A) Electric shock
B) Excessive noise levels
C) High-voltage electricity
D) Discharge of harmful gas into the air
page-pfb
11
21) How can process technicians identify a problem trend?
A) Observe compressor operation
B) Train to conduct maintenance on compressors
C) Check and record pressures, temperatures, and flow rates
D) Check rotating equipment frequently
22) Which of the following should process technicians look for in the operation and maintenance
of compressors?
A) Oil levels
B) Flow rates
C) Vibration monitors
D) All of the above
page-pfc
12
23) Which of the following is a step in the typical startup procedures for a reciprocating
compressor?
A) De-energize all equipment.
B) Depressurize the compressor.
C) Close all block valves.
D) Adjust the cylinder loadings for efficient operation.
24) Which of the following is a step in the typical lockout/tagout procedure for a compressor?
A) Use an inert gas to purge the compressor case of air.
B) Place ancillary lubricating and seal oil systems into operation.
C) De-energize all equipment drivers per an energy isolation plan.
D) Check all lubrications levels and bring them to their proper level.

Trusted by Thousands of
Students

Here are what students say about us.

Copyright ©2022 All rights reserved. | CoursePaper is not sponsored or endorsed by any college or university.