PDH Engineer     PE PDH
PDH Online

Disinfecting the Water using UV Radiation


Quiz Questions

1. UV radiation inactivates organisms by absorption of the light which causes a photochemical reaction that alters molecular components essential to cell function.
True
False
2. UV radiation energy waves are the range of electromagnetic waves from________________ long.
100 to 400 nm
100 to 300 nm
3. In terms of germicidal effects, the optimum UV range is between 245 and 285 nm.
True
False
4. The percent transmittance is determined from the absorbance (A) by the equation:

Percent Transmittance = 100 ‘ 10-A
True
False
5. UV lamps do not operate the same way as fluorescent lamps.
True
False
6. Typically _______________________ are enclosed in a quartz sleeve to separate the water from the lamp surface.
Low-pressure lamps
High-pressure lamps
7. Ballasts are transformers that control the power to the UV lamps. Ballasts should operate at temperatures below 60oC to prevent premature failure.
True
False
8. The major elements that should be considered in the hydraulic design of a UV closed vessel reactor are dispersion, turbulence, effective volume, residence time distribution, and flow rate.
True
False
9. An ideal plug flow reactor has no dispersion and is approximated by a long tank with high length-to-width ratio in which dispersion is minimal.
True
False
10. The rate of disinfection is indirectly related to the average intensity of the UV light.
True
False
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