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MECHANICAL TECHNOLOGIST GRADE 1
CWEA CERTIFICATION EXAM STUDY
GUIDE BRAND NEW OFFICIAL QUESTIONS
WITH ANSWERS.
What is used to prevent internal re-circulation on a centrifugal
pump? - correct answer -Wear rings - Proper setting of clearance
between the impeller and the wear plate behind the impeller
What type of pump is a progressive cavity pump? - correct
answer -Positive displacement pump
Where do you apply pressure on a tight fitting bearing being
installed on a shaft? - correct answer -The inner race of the
bearing
What is a crimping tool use for in the electrical world? - correct
answer -To permanently attach electrical fittings to wires
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If you find burnt insulation on the lead side of a starter, what does
that indicate? - correct answer -A loose connection
If a centrifugal pump sounds like it has rocks in it, what does this
indicate? - correct answer -Cavitation (the formation and breaking
of air bubblers on the impeller)
What is a megger used for? - correct answer -test the quality of
the insulation of a wire in relation to the ground
What is used on a large diameter wire to measure current? -
correct answer -A clamp-on amp meter
When using a micrometer torque wrench, what indicates torque
has been reached? - correct answer -The wrench will click
A 150 watt bulb at 110 volts burns for 8 hours, what is the power
used? - correct answer -150 x 8 = 1200 Watts in 8 hours
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A room is 60' by 30' ft and the entire room needs new tile. How
many square feet of tile should be ordered? If 1 square foot of tile
costs $1.12, how much would it cost to retile the entire room? -
correct answer -$2016 for 1800sq ft of tile
You need to seal a retaining wall 400' by 20'. One gallon of seal
covers 255sq feet. How many gallons are needed for 2 coats? -
correct answer -62.75 gallons for 2 coats of an 8,000sq foot wall
In a circuit where there is 1,732 volts across a 500 OHM resistor,
what is the power consumed? (Watts) - correct answer -Watts =
amps x volts
1, = 3.464 amps
Watts = 3.464 x 1,732 = 5,999.65 Watts (power consumed)
What does VOM stand for? - correct answer -Volt Ohm Meter
How do you store a VOM? What is the proper switch position to
store a VOM? - correct answer -Turn it off in the voltage highest
range with the switch in the off position.
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What are fusible plugs used for in a chlorine cylinder? - correct
answer -As a pressure relief in the event of fire, the fusible plug
will melt releasing pressure and preventing explosion (Anti
explosion device)
What is the conversion factor of 1 foot of head pressure to psi
(pressure per square inch)? - correct answer -0.433
1psi = 2.31 feet of head pressure
.31 = 0.433 psi
What causes false brinelling on a bearing? - correct answer -
Vibration
What is brinnelling - correct answer -Indentations in metal and is
caused by vibrations
A weigh scale uses four round 5" diameter iron plates 1/4" thick
as counterweights, if iron weighs 490 lbs/ft^3, what is the weight
of the plates? - correct answer -5.62 lbs
MECHANICAL TECHNOLOGIST GRADE 1
CWEA CERTIFICATION EXAM STUDY
GUIDE BRAND NEW OFFICIAL QUESTIONS
WITH ANSWERS.
What is used to prevent internal re-circulation on a centrifugal
pump? - correct answer -Wear rings - Proper setting of clearance
between the impeller and the wear plate behind the impeller
What type of pump is a progressive cavity pump? - correct
answer -Positive displacement pump
Where do you apply pressure on a tight fitting bearing being
installed on a shaft? - correct answer -The inner race of the
bearing
What is a crimping tool use for in the electrical world? - correct
answer -To permanently attach electrical fittings to wires
, Page | 2
If you find burnt insulation on the lead side of a starter, what does
that indicate? - correct answer -A loose connection
If a centrifugal pump sounds like it has rocks in it, what does this
indicate? - correct answer -Cavitation (the formation and breaking
of air bubblers on the impeller)
What is a megger used for? - correct answer -test the quality of
the insulation of a wire in relation to the ground
What is used on a large diameter wire to measure current? -
correct answer -A clamp-on amp meter
When using a micrometer torque wrench, what indicates torque
has been reached? - correct answer -The wrench will click
A 150 watt bulb at 110 volts burns for 8 hours, what is the power
used? - correct answer -150 x 8 = 1200 Watts in 8 hours
, Page | 3
A room is 60' by 30' ft and the entire room needs new tile. How
many square feet of tile should be ordered? If 1 square foot of tile
costs $1.12, how much would it cost to retile the entire room? -
correct answer -$2016 for 1800sq ft of tile
You need to seal a retaining wall 400' by 20'. One gallon of seal
covers 255sq feet. How many gallons are needed for 2 coats? -
correct answer -62.75 gallons for 2 coats of an 8,000sq foot wall
In a circuit where there is 1,732 volts across a 500 OHM resistor,
what is the power consumed? (Watts) - correct answer -Watts =
amps x volts
1, = 3.464 amps
Watts = 3.464 x 1,732 = 5,999.65 Watts (power consumed)
What does VOM stand for? - correct answer -Volt Ohm Meter
How do you store a VOM? What is the proper switch position to
store a VOM? - correct answer -Turn it off in the voltage highest
range with the switch in the off position.
, Page | 4
What are fusible plugs used for in a chlorine cylinder? - correct
answer -As a pressure relief in the event of fire, the fusible plug
will melt releasing pressure and preventing explosion (Anti
explosion device)
What is the conversion factor of 1 foot of head pressure to psi
(pressure per square inch)? - correct answer -0.433
1psi = 2.31 feet of head pressure
.31 = 0.433 psi
What causes false brinelling on a bearing? - correct answer -
Vibration
What is brinnelling - correct answer -Indentations in metal and is
caused by vibrations
A weigh scale uses four round 5" diameter iron plates 1/4" thick
as counterweights, if iron weighs 490 lbs/ft^3, what is the weight
of the plates? - correct answer -5.62 lbs
