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CWEA MECHANICAL TECHNOLOGIST II
CERTIFICATION EXAM 2025/2026 ACTUAL EXAM
QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) ALL ANSWERED {370 Q & A}
ALREADY GRADED A+ / MECHANICAL
TECHNOLOGIST II CWEA CERTIFICATION EXAM AND
STUDY GUIDE | BRAND NEW!
What is the most common wire type for aluminum MIG welding? -
✔✔✔ Correct Answer > ER4043.
What are some factors that might cause an engine to stall? - ✔✔✔
Correct Answer > Misfiring, low cooling water temperature, improper
application of load, improper timing, obstruction of the
combustion/exhaust system, insufficient intake air.
What is gas tungsten arc welding? - ✔✔✔ Correct Answer > Also
known as TIG welding, uses a non-consumable tungsten
electrode to produce the weld -- the weld area is protected from
atmospheric contamination by an inert shielding gas such as
Argon or Helium.
,2|Page
Where is the best place to find out what personal protective gear
is necessary when working with a chemical? - ✔✔✔ Correct Answer >
MSDS or SDS.
The lack of an unpleasant odor in a manhole, lift station or other
structures does not always mean that dangerous gases are not
present because why? - ✔✔✔ Correct Answer > Some dangerous
gases have no odor.
The main advantage of a split case design is that there is no need
to disconnect the ___________ to gain access to the pump
components. - ✔✔✔ Correct Answer > Piping.
A double volute casing adds what to the fluid passage? - ✔✔✔
Correct Answer > Guiding vane.
The impeller does not cup the fluid it is pumping, but slides
through and _________ it. - ✔✔✔ Correct Answer > Throws.
What type of impeller is most efficient in energy transfer? - ✔✔✔
Correct Answer > Closed impeller.
Which impeller imparts a higher velocity to the pumped fluid,
curved or straight vane? - ✔✔✔ Correct Answer > Curved vane.
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What kinds of bearings are normally used on multistage pumps
that have high pressures and deliveries? - ✔✔✔ Correct Answer >
Thrust bearings.
When welding with oxyacetylene gas, what should be used to
strike the torch? - ✔✔✔ Correct Answer > Spark lighter.
In arc-welding, what are the melting chemicals called that form a
protective blanket to keep atmosphere out of the weld? - ✔✔✔
Correct Answer > Slag.
What is shielded metal arc welding? - ✔✔✔ Correct Answer > Also
known as stick welding, uses an electrode that has flux, the
protectant for the weld puddle, around it.
What is gas metal arc welding? - ✔✔✔ Correct Answer > Also known
as MIG welding, uses a wire feeding gun that feeds wire at an
adjustable speed and flows an argon-based shielding gas OR a
mix of argon and CO2 over the weld puddle to protect it from
atmospheric contamination.
What is flux core arc welding? - ✔✔✔ Correct Answer > Almost
identical to MIG welding except it uses a special tubular wire
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filled with flux, and can be used with or without a shielding gas
depending on the filler.
What is submerged arc welding? - ✔✔✔ Correct Answer > Uses an
automatically fed consumable electrode and a blanket of
granular fusible flux -- the molten weld and the arc zone are
protected from atmospheric contamination by being submerged
under the flux blanket.
In a lineshaft turbine pump, fluid enters the pumping unit through
what? - ✔✔✔ Correct Answer > The suction bell.
The amount of pressure in a lineshaft turbine pump can be
increased by adding what? - ✔✔✔ Correct Answer > Bowls.
The water column of a lineshaft turbine contains the _________
and the _________. - ✔✔✔ Correct Answer > Drive shaft and radial
bearings.
What type of turbine pump is typically used as a booster pump? -
✔✔✔ Correct Answer > Can turbine.
In a submersible pump, where is the motor located? - ✔✔✔ Correct
Answer > Under the pumping unit.
CWEA MECHANICAL TECHNOLOGIST II
CERTIFICATION EXAM 2025/2026 ACTUAL EXAM
QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) ALL ANSWERED {370 Q & A}
ALREADY GRADED A+ / MECHANICAL
TECHNOLOGIST II CWEA CERTIFICATION EXAM AND
STUDY GUIDE | BRAND NEW!
What is the most common wire type for aluminum MIG welding? -
✔✔✔ Correct Answer > ER4043.
What are some factors that might cause an engine to stall? - ✔✔✔
Correct Answer > Misfiring, low cooling water temperature, improper
application of load, improper timing, obstruction of the
combustion/exhaust system, insufficient intake air.
What is gas tungsten arc welding? - ✔✔✔ Correct Answer > Also
known as TIG welding, uses a non-consumable tungsten
electrode to produce the weld -- the weld area is protected from
atmospheric contamination by an inert shielding gas such as
Argon or Helium.
,2|Page
Where is the best place to find out what personal protective gear
is necessary when working with a chemical? - ✔✔✔ Correct Answer >
MSDS or SDS.
The lack of an unpleasant odor in a manhole, lift station or other
structures does not always mean that dangerous gases are not
present because why? - ✔✔✔ Correct Answer > Some dangerous
gases have no odor.
The main advantage of a split case design is that there is no need
to disconnect the ___________ to gain access to the pump
components. - ✔✔✔ Correct Answer > Piping.
A double volute casing adds what to the fluid passage? - ✔✔✔
Correct Answer > Guiding vane.
The impeller does not cup the fluid it is pumping, but slides
through and _________ it. - ✔✔✔ Correct Answer > Throws.
What type of impeller is most efficient in energy transfer? - ✔✔✔
Correct Answer > Closed impeller.
Which impeller imparts a higher velocity to the pumped fluid,
curved or straight vane? - ✔✔✔ Correct Answer > Curved vane.
,3|Page
What kinds of bearings are normally used on multistage pumps
that have high pressures and deliveries? - ✔✔✔ Correct Answer >
Thrust bearings.
When welding with oxyacetylene gas, what should be used to
strike the torch? - ✔✔✔ Correct Answer > Spark lighter.
In arc-welding, what are the melting chemicals called that form a
protective blanket to keep atmosphere out of the weld? - ✔✔✔
Correct Answer > Slag.
What is shielded metal arc welding? - ✔✔✔ Correct Answer > Also
known as stick welding, uses an electrode that has flux, the
protectant for the weld puddle, around it.
What is gas metal arc welding? - ✔✔✔ Correct Answer > Also known
as MIG welding, uses a wire feeding gun that feeds wire at an
adjustable speed and flows an argon-based shielding gas OR a
mix of argon and CO2 over the weld puddle to protect it from
atmospheric contamination.
What is flux core arc welding? - ✔✔✔ Correct Answer > Almost
identical to MIG welding except it uses a special tubular wire
, 4|Page
filled with flux, and can be used with or without a shielding gas
depending on the filler.
What is submerged arc welding? - ✔✔✔ Correct Answer > Uses an
automatically fed consumable electrode and a blanket of
granular fusible flux -- the molten weld and the arc zone are
protected from atmospheric contamination by being submerged
under the flux blanket.
In a lineshaft turbine pump, fluid enters the pumping unit through
what? - ✔✔✔ Correct Answer > The suction bell.
The amount of pressure in a lineshaft turbine pump can be
increased by adding what? - ✔✔✔ Correct Answer > Bowls.
The water column of a lineshaft turbine contains the _________
and the _________. - ✔✔✔ Correct Answer > Drive shaft and radial
bearings.
What type of turbine pump is typically used as a booster pump? -
✔✔✔ Correct Answer > Can turbine.
In a submersible pump, where is the motor located? - ✔✔✔ Correct
Answer > Under the pumping unit.
