GRADE 1 MECHANICAL TECHNOLOGIST
COMPREHENSIVE TEST PAPER 2026
COMPLETE SOLUTIONS
◉ How do you calculate watts? Answer: Watts = amps * volts
◉ What are ohms? Answer: A measurement of resistance between
two points
◉ How do you calculate ohms? Answer: Ohms (R) = volts / amps
◉ What does pneumatic mean? Answer: Containing or operated by
gas or air under pressure
◉ The specific gravities of gasoline and other volatile solvents are
typically __________________ than water Answer: less than, meaning
they will float
◉ How many gallons are in 1 ft^3? Answer: 7.48
◉ If a gallon of gasoline weighs 7 lbs, what would be the weight of a
350-gallon tank full of gasoline? Answer: 350 gal * 7lbs(per 1gal) =
2,450 lbs
,◉ What is 500 gpm in MGD? Answer: 500gal/1 min * 1440 min =
720,000 gal per day / 1,000,000 = 0.72 MGD
◉ A chemical feed pump is set to deliver 50 GPD. What is the
calibrated chemical feed in gpm? Answer: 50gal/1 day divided by
24hours = 2.083gal/hour divided by 60 minutes = 0.035 gpm
◉ How many Liters are there in 1 gallon? Answer: 3.785 Liters
◉ A cyanide destruction process is designed to treat 30 lbs of
cyanide per 24 hour operational day. How many lbs of cyanide can
be treated during an 8 hour shift? Answer: 30 lbs/1 day divided by
24 hours = 1.25lbs/hour multiplied by 8 hours (1 shift) = 10lbs
cyanide per shift
◉ What is the volume of a slab of concrete that is 150ft long, 200ft
wide, and 3in thick? Answer: 3in / 12 in = 0.25ft
150ft * 200ft *0.25ft = 7,500ft^3
◉ How many cubic feet are in 1 cubit yard? Answer: 27 cubic feet
(ft^3) = 1 cubic yd (yd^3)
, ◉ What is the area of a manhole that measures 40 inches in
diameter? Answer must be in ft^2 Answer: 40in / 12in = 3.3ft
0.785 * 3.3 *3.3 = 8.71ft^2
◉ CBT Demo Website Answer: www.cwea.org/cbt
◉ What is 1 cubic foot in cubic inches (ft^3)? Answer: 1,728 cubic
inches
◉ How many gallons is one cubic foot (ft^3)? Answer: 7.48gal
◉ How many pounds (lbs) is one cubic foot (ft^3) of water? Answer:
62.43 lbs
◉ 1 gal of water weighs how much in lbs? Answer: 8.34 lbs
◉ What is 1 ft^3/sec in gal/min? Answer: 448.8 gal/min
◉ What is 1 MGD in Gal/min? Answer: 694 gal/min
◉ What is 1 horsepower equal to in foot-pounds/minute? Answer:
33,000 foot-pounds/minute
COMPREHENSIVE TEST PAPER 2026
COMPLETE SOLUTIONS
◉ How do you calculate watts? Answer: Watts = amps * volts
◉ What are ohms? Answer: A measurement of resistance between
two points
◉ How do you calculate ohms? Answer: Ohms (R) = volts / amps
◉ What does pneumatic mean? Answer: Containing or operated by
gas or air under pressure
◉ The specific gravities of gasoline and other volatile solvents are
typically __________________ than water Answer: less than, meaning
they will float
◉ How many gallons are in 1 ft^3? Answer: 7.48
◉ If a gallon of gasoline weighs 7 lbs, what would be the weight of a
350-gallon tank full of gasoline? Answer: 350 gal * 7lbs(per 1gal) =
2,450 lbs
,◉ What is 500 gpm in MGD? Answer: 500gal/1 min * 1440 min =
720,000 gal per day / 1,000,000 = 0.72 MGD
◉ A chemical feed pump is set to deliver 50 GPD. What is the
calibrated chemical feed in gpm? Answer: 50gal/1 day divided by
24hours = 2.083gal/hour divided by 60 minutes = 0.035 gpm
◉ How many Liters are there in 1 gallon? Answer: 3.785 Liters
◉ A cyanide destruction process is designed to treat 30 lbs of
cyanide per 24 hour operational day. How many lbs of cyanide can
be treated during an 8 hour shift? Answer: 30 lbs/1 day divided by
24 hours = 1.25lbs/hour multiplied by 8 hours (1 shift) = 10lbs
cyanide per shift
◉ What is the volume of a slab of concrete that is 150ft long, 200ft
wide, and 3in thick? Answer: 3in / 12 in = 0.25ft
150ft * 200ft *0.25ft = 7,500ft^3
◉ How many cubic feet are in 1 cubit yard? Answer: 27 cubic feet
(ft^3) = 1 cubic yd (yd^3)
, ◉ What is the area of a manhole that measures 40 inches in
diameter? Answer must be in ft^2 Answer: 40in / 12in = 3.3ft
0.785 * 3.3 *3.3 = 8.71ft^2
◉ CBT Demo Website Answer: www.cwea.org/cbt
◉ What is 1 cubic foot in cubic inches (ft^3)? Answer: 1,728 cubic
inches
◉ How many gallons is one cubic foot (ft^3)? Answer: 7.48gal
◉ How many pounds (lbs) is one cubic foot (ft^3) of water? Answer:
62.43 lbs
◉ 1 gal of water weighs how much in lbs? Answer: 8.34 lbs
◉ What is 1 ft^3/sec in gal/min? Answer: 448.8 gal/min
◉ What is 1 MGD in Gal/min? Answer: 694 gal/min
◉ What is 1 horsepower equal to in foot-pounds/minute? Answer:
33,000 foot-pounds/minute
