MECHANICAL EXAM TECHNOLOGIST
GRADE 1 PRACTICE SET 2026 HVAC AND
MACHINERY QUESTIONS HIGH YIELD A+
◉ What is 1 BTU equal to in foot-pounds?
Answer: 778 foot-pounds
◉ What is 1 watt equal to in BTU/hour?
Answer: 3,412 BTU/hour
◉ 1 Thermal Unit is equal to ______________ BTU
Answer: 100,000 BTU
◉ Which welding process is most commonly used for small pipe
maintenance welding?
Answer: OxyAcetylene gas welding
◉ What types of jobs would you need Shielded metal-arc welding
for?
Answer: Constructing pipelines, tanks, industrial construction,
structures
,◉ What types of jobs do you need Gas metal-arc welding for?
Answer: Deep groove welding, automotive repair, manufacturing
heavy equipment
◉ What types of jobs do you use Gas tungsten-arc welding for?
Answer: Thin sections of stainless steel and other precise jobs
dealing with dissimilar metals
◉ What is wet stacking and how can it be prevented?
Answer: It is unburned fuel collecting in the exhaust due to light or
no load conditions.
◉ To check flywheel face turnout, where should the dial indicator be
positioned?
Answer: The base on the well housing and the pointer on the
flywheel face.
◉ What issues arise with excessive flywheel face turnout?
Answer: Excessive runout can lead to uneven pressure distribution
on the clutch disc, affecting its performance. Runout causes
additional friction and drag, leading to clutch slippage, poor release,
and difficulty shifting gears.
, ◉ 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?
Answer: 95
Solution: driver Gear x Driver RPM=Driven Gear x Driven RPM38 x
360 = N x 14413,680 = 144N13, = 144N / 14495 = N(95
Tooth Gear
◉ What equation would you use to figure out the rpm of a Gear
Driver?
Answer: Gear Driver (number of teeth) x Driver RPM = Driven Gear
(number of teeth) x Driven RPM
◉ Does a sealed ball bearing need to be lubricated?
Answer: It does not need to be lubricated under normal use
◉ A DAFT is an acronym meaning.........
Answer: Dissolved Air Flotation Thickener
◉ What is the governing agency that permits odor control systems?
Answer: AQMD - Air Quality Management District
◉ At what pressure rating should you use a blower instead of a fan?
GRADE 1 PRACTICE SET 2026 HVAC AND
MACHINERY QUESTIONS HIGH YIELD A+
◉ What is 1 BTU equal to in foot-pounds?
Answer: 778 foot-pounds
◉ What is 1 watt equal to in BTU/hour?
Answer: 3,412 BTU/hour
◉ 1 Thermal Unit is equal to ______________ BTU
Answer: 100,000 BTU
◉ Which welding process is most commonly used for small pipe
maintenance welding?
Answer: OxyAcetylene gas welding
◉ What types of jobs would you need Shielded metal-arc welding
for?
Answer: Constructing pipelines, tanks, industrial construction,
structures
,◉ What types of jobs do you need Gas metal-arc welding for?
Answer: Deep groove welding, automotive repair, manufacturing
heavy equipment
◉ What types of jobs do you use Gas tungsten-arc welding for?
Answer: Thin sections of stainless steel and other precise jobs
dealing with dissimilar metals
◉ What is wet stacking and how can it be prevented?
Answer: It is unburned fuel collecting in the exhaust due to light or
no load conditions.
◉ To check flywheel face turnout, where should the dial indicator be
positioned?
Answer: The base on the well housing and the pointer on the
flywheel face.
◉ What issues arise with excessive flywheel face turnout?
Answer: Excessive runout can lead to uneven pressure distribution
on the clutch disc, affecting its performance. Runout causes
additional friction and drag, leading to clutch slippage, poor release,
and difficulty shifting gears.
, ◉ 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?
Answer: 95
Solution: driver Gear x Driver RPM=Driven Gear x Driven RPM38 x
360 = N x 14413,680 = 144N13, = 144N / 14495 = N(95
Tooth Gear
◉ What equation would you use to figure out the rpm of a Gear
Driver?
Answer: Gear Driver (number of teeth) x Driver RPM = Driven Gear
(number of teeth) x Driven RPM
◉ Does a sealed ball bearing need to be lubricated?
Answer: It does not need to be lubricated under normal use
◉ A DAFT is an acronym meaning.........
Answer: Dissolved Air Flotation Thickener
◉ What is the governing agency that permits odor control systems?
Answer: AQMD - Air Quality Management District
◉ At what pressure rating should you use a blower instead of a fan?
