Small Engines Exam Graded A+ (Verified)., Exams of Engineering
tappit - ANSWERValve lifter: makes the rocker arms move
Cam Lobe - ANSWERCauses action in the valve lifters
Rocker arm - ANSWERTransfers movement of the pushrods to the
intake/exhaust valve
3 Piston rings: - ANSWERCompression
Oil
Scraper
Horsepower formula given torx and RPMs - ANSWER(Torx X RPM)/5252
2 cycle engine advantages vs disadvantages - ANSWERAdvantages: smaller,
lighter, higher RMPs
Disadvantages: shorter lifespan, less power
, Altitude and horsepower relationship - ANSWERHigher altitude= less
horsepower
What is the bore - ANSWERThe diameter of the cylinder
What is the stroke? - ANSWERThe length of movement between BDC & TDC
Range of compression ratio for small engines(total volume of displacement) -
ANSWER6:8.5
Why do valves have an interference angle? - ANSWERTo prevent valve
leakage
A mechanic uses a 5ft bar with 100lbs of force. What ft lbs is he using? -
ANSWER500ft/lbs
An engine produces 500 ft/lbs at 3000RPMs. What is the horsepower? -
ANSWER(500 X 3200) /5252
Formula for pounds per square inch - ANSWERWeight/area
There's 1000lbs on 4inches. What is the pounds per square inch? -
ANSWER1000/ 4 inches = 25sqft
What is potential energy? - ANSWERStored energy at rest
tappit - ANSWERValve lifter: makes the rocker arms move
Cam Lobe - ANSWERCauses action in the valve lifters
Rocker arm - ANSWERTransfers movement of the pushrods to the
intake/exhaust valve
3 Piston rings: - ANSWERCompression
Oil
Scraper
Horsepower formula given torx and RPMs - ANSWER(Torx X RPM)/5252
2 cycle engine advantages vs disadvantages - ANSWERAdvantages: smaller,
lighter, higher RMPs
Disadvantages: shorter lifespan, less power
, Altitude and horsepower relationship - ANSWERHigher altitude= less
horsepower
What is the bore - ANSWERThe diameter of the cylinder
What is the stroke? - ANSWERThe length of movement between BDC & TDC
Range of compression ratio for small engines(total volume of displacement) -
ANSWER6:8.5
Why do valves have an interference angle? - ANSWERTo prevent valve
leakage
A mechanic uses a 5ft bar with 100lbs of force. What ft lbs is he using? -
ANSWER500ft/lbs
An engine produces 500 ft/lbs at 3000RPMs. What is the horsepower? -
ANSWER(500 X 3200) /5252
Formula for pounds per square inch - ANSWERWeight/area
There's 1000lbs on 4inches. What is the pounds per square inch? -
ANSWER1000/ 4 inches = 25sqft
What is potential energy? - ANSWERStored energy at rest
