PDH Engineer     PE PDH
PDH Online

Improving Compressed Air System Performance


Quiz Questions

1. What is the use of compressor?
To increase the pressure of the gas.
To decrease the pressure of the gas.
To maintain the pressure of the gas.
None of these
2. The inherent characteristic of centrifugal air compressor is that as system pressure decreases the compressor‘s flow capacity decrease.
True
False
3. What is the oldest method of driving compressors?
Steam Engine
Turbine
Both a & b
None of these
4. Dense-phase transport is used to transport solids in a(n) ——————————format.
individual
batch
Both a & b
None of these
5. The term vacuum generation describes applications where compressed air is used in conjunction with a venture, educator or ejector to generate a negative- pressure mass flow.
True
False
6.

Total leakage (percentage) can be calculated as follows: where: T = on-load time (minutes)

t = off-load time (minutes)
Leakage (%)= [(T x 100)/(T*t)]
Leakage (%) = [(T x 100)/(T+t)]
Leakage (%) = [(T x 100)/(T-t)]
None of these
7. While cooling the temperature of the lubricant injected into the compression chamber is generally controlled directly to a minimum of
1600 Fahrenheit.
1500 Fahrenheit.
1400 Fahrenheit.
1300 Fahrenheit.
8. Rotary screw compressors may be air or water cooled.
True
False
9. Depending on air system demand the control range can be anywhere from
1 to 20 psi.
2 to 20 psi.
1 to 30 psi.
2 to 30 psi.
10. What is critical temperature?
The highest temperature at which well-defined liquid and vapour states exist.
Sometimes it is defined as the highest temperature at which it is possible to liquefy or gas by pressure alone.
Both a & b
None of the above
11. Excessive pressure drop will result in
poor system performance and excessive energy consumption.
efficient system performance and less energy consumption.
poor system performance and less energy consumption.
efficient system performance and excessive energy consumption.
12. Centrifugal air compressors are
high speed rotating machines.
low speed rotating machines.
medium speed rotating machines.
None of the above
13. Aerating, agitating, oxygenating or percolating liquid with compressed air is defined as
open blowing.
sparging.
aspirating.
atomizing.
14. The typical applications of cabinet cooling are programmable controllers, line control cabinets, motor control cabinets and relay pads.
True
False
15. Leaks occur most often at ___________.
joints and connections.
only joints.
only connections.
None of these
16. Which compressor is usually limited to higher volume industrial applications?
Centrifugal compressor
Simple and double acting compressor
Rotary compressor
None of the above
17. Valves are used to_______________.
direct the flow
prevent flow
Both a & b
None of the above
18. Seals in compressors are used as________________.
maximize leakage
minimise leakage
increase the flow of the fluid
None of the above
19. Which element is measured in order to estimate the annual electricity consumption of a compressed air system?
Pressure
Power
Temperature
Baseline
20. ___________ detection and repair is an important part of any maintenance program.
Compressor
Leak
Both a & b
None of these
DiscountPDH.com

DiscountPDH provides the best and highest quality online PDH engineering continuing education to PE Engineers.

We provide live PDH webinars and live PDH seminars. They are also accepted for PE Professional Engineering license renewal with the State Board of professional Engineers. Our PDH Courses are accepted in all state of United States of America. These states are Alabama, Alaska, Arkansas, Connecticut, District of Columbia, Florida, Georgia, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, South Carolina, South Dakota, Tennessee, Texas, Utah, Virginia, Washington, West Virginia, Wisconsin, and Wyoming.

Engineering Continuing Education PDH Courses
ALL PDH Courses
HVAC
ADA Accessible Design Courses
PE Civil Engineers
PE Structural Engineers
PE Mechanical Engineers
PE Environmental Engineers
PE Electrical Engineers
PE Chemical & Oil & Gas Engineers
PE Ohio Engineers
PE Nebraska Engineers & Architects
PE Illinois Engineers
Online PDH Courses
Land Surveying
Construction
Architecture
LEED - Green Building
Safety and Failure Analysis
Geology
Landscape Architecture
Building Inspection
Ethics & Law
Business Skills
Interior Design
Discount Packages