Grade 1 Mechanical Technologist Study Guide Questions and Answers
100% Pass
Which welding process is most commonly used for small pipe maintenance welding? -
Ans>>>Oxyacetylene gas welding
What is the proper definition of an engine? -Ans>>>It is a machine designed to convert energy into
useful mechanical motion
What is wet stacking and how can it be prevented? -Ans>>>It is unburned fuel collecting in the
exhaust due to light or no load conditions.
To check flywheel face runout, where should the dial indicator be positioned? -Ans>>>The base on
the bell housing and pointer on the flywheel face.
If a 38-tooth gear running at 360 rpm is driving another gear at 144 rpm, what is the number of teeth
on the driven gear? -Ans>>>Solution: driver Gear x Driver RPM=Driven Gear x Driven RPM
38 x 360 = N x 144
13,680 = 144N
13,680 / 144 = 144N / 144
95 = N
(95 Tooth Gear
Which of the following is required for a sealed ball bearing? -Ans>>>It does not need to be lubricated
under normal use.
A DAFT is an acronym meaning: -Ans>>>Dissolved Air Flotation Thickener.
What is the governing agency that permits odor control systems? -Ans>>>AQMD: Air Quality
Management District
At what pressure rating would you use a blower instead of a fan? -Ans>>>7 PSI
Which of the following valves is unsuitable for high-pressure flow? -Ans>>>A needle valve
A sodium hypochlorite tank's full working capacity is 23,000 gallons. Its current level is at 1,200
gallons. How many gallons does the delivery driver need to add to bring it to 70% capacity? -
Ans>>>Solution:
23,000 gallons max capacity x 70% desired capacity = 16,100 gallons desired.
16,100 gallons desired - 1,200 gallons current level
14,900 gallons needed to add
What is the result if 6/8 " is converted to decimal form? -Ans>>>6 / 8 = 0.75 or .75
What is the conversion of 212 degrees Fahrenheit into Celsius?
What is the conversion of 100 degrees Celsius into Fahrenheit? -Ans>>>C° = (F° - 32)/9 x 5 •Begin by
subtracting 32 from the Fahrenheit number.
•Divide the answer by 9.
•Then multiply that answer by 5.
To convert from Celsius to Fahrenheit:
F° = (C° x 9/5) +32•Begin by multiplying the Celsius temperature by 9.
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