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CWEA Mechanical Technologist Grade II Certification Exam | Questions, Verified Answers & Complete Technical Study Guide | Updated 2026–2027 | Grade A+

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CWEA Mechanical Technologist Grade II is a focused certification exam preparation resource featuring exam questions and verified answers for candidates preparing for the Grade II Mechanical Technologist examination. The material supports review of mechanical equipment, operation and maintenance principles, safety practices, troubleshooting, and technical concepts relevant to water and wastewater treatment facilities. Ideal for technicians and water environment professionals preparing for CWEA certification, this resource provides targeted practice and efficient exam review.

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CWEA Mechanical Technologist Grade II - Certification Exam Questions & Verified Answers

Carbon Dioxide fire extinguishers are intended for use on Class B and class C
what class of fires?



How does CAL-OSHA define a confined space? Limited or restricted means of entry or exit, large enough to bodily enter and
perform work, and is not designed for continuous human occupancy.



What section of an MSDS gives safe exposure limits Hazardous information and ingredients.
based on OSHA guidelines?



The tool rest on a grinder should be positioned within 1/8 inch.
________________________________ of the wheel
surface to prevent stock from getting caught.


Pneumatic tools should all be equipped with what? Air line lubricator.




What is the purpose of a cage in anti friction bearings? Properly space the rolling elements and guide them through the load zone.




The reducer located on the suction side of a horizontally Eccentric.
mounted centrifugal pump should be what?



When aligning a piece of equipment what should you do Complete the vertical part of the alignment first.
first?



When dealing with screw threads, UNC stands for what? Unified national coarse.




What is backlash on a gear? The play between gears that prevents binding.




What is the initial step in preparation for installation of Locate the baselines.
machinery?



What is the most popular welding process in use today? Shielded metal-arc.




You have been informed that your centrifugal pump was Air or vapor in liquid.
discharging properly and now it is not, what is the issue?



If you have been given written instructions that you don't Ask the author for clarification.
understand, what should you do?



An SCBA is used for what kind of work? Escape and rescue.




Stuvia 2026-2027 | Latest Version

, CWEA Mechanical Technologist Grade II - Certification Exam Questions & Verified Answers
When is a piece of equipment considered LOTO and safe When you have brought the machine to zero energy state using LOTO.
to work on?



Prescription eyeglasses that can be worn in an industrial ANSI.
setting must be approved by what agency?



What is the device on a power tool that cuts off power Deadman switch.
when released?



What type of saw is designed to cut wood with the grain? Ripsaw.




What are the two primary types of anti-friction bearings? Ball and roller.




What are the two types of positive displacement air Reciprocating and Rotary.
compressors?



What is the purpose of a shaft sleeve? Protect the pump shaft.




What is the purpose of surface skimming sprays? Scum collection.




What is alternating current? Current flow that is continuously reversing in direction.




What is the area on a centrifugal pump that holds the Stuffing box.
packing?



In a mechanical drawing a dashed line ----- represents A hidden line.
what?



When ordering sheet steel, you should designate the Gauge number.
thickness by what?



What is the most widely used of all smaller sized pipe Globe valve.
valves?



Receiving job instruction and planning equipment use is a Job preparation.
part of what?



Anticipating other tasks or problems does what? Sharply reduces the number of emergencies.




Stuvia 2026-2027 | Latest Version

, CWEA Mechanical Technologist Grade II - Certification Exam Questions & Verified Answers
Making job planning a group effort does what? Improves productivity.




The NEC identifies environments that contain flammable Class I.
vapors and gases as which class of hazardous location?



What reduces high voltages and currents to safe values for Instrument transformers.
measurements?



What is always required when working in a confined Continuous air monitoring.
space?



Oxygen deficiency occurs when the oxygen level is less 19.5% by volume.
than what by volume?



Where is the best place to find out what personal MSDS or SDS.
protective gear is necessary when working with a
chemical?


The lack of an unpleasant odor in a manhole, lift station or Some dangerous gases have no odor.
other structures does not always mean that dangerous
gases are not present because why?


What is the first step to take when preparing to perform Notify all affected employees that equipment is going to be locked out and explain
maintenance or repairs on an operating piece of the reason for the lock out.
equipment?


Rubber safety gloves should be tested how often? Every 6 months.




Rubber safety blankets should be tested how often? Every 12 months.




What is the interrupting current of a GFIC receptacle? 5-6 mA.




What type of stepladder is forbidden while working on Aluminum.
electrical equipment?



What is the killer of electrical shock? Current.




The relationship between an electric current and a Electromagnetism.
magnetic field is called what?



An on-off switch with overload relays is called what? Manual starter.




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