Briggs & Stratton Horsepower & Torque
The terms "horsepower" and "watt" are measurements of exactly the same value; that of the rate at which work is done. A. TRUE B. FALSE
TRUE
Briggs & Stratton engines safely operate at a top no load range of up to ________ RPM. A. 4,000 B. 3,750 C. 3,600 D. 4,750
A. 4,000
What unit of measurement is used for torque? A. Foot Pounds B. Horsepower C. Millimeters D. Liters
A. Foot Pounds
The force applied to the piston is a result of: A. Gas expansion because of heat. B. Pressure from the compression stroke. C. Leverage because of the length of the connecting rod. D. None of the above.
A. Gas expansion because of heat.
What is the formula to find work when force and distance are known? A. W = F X D B. W = F - D C. W = F + D D. None of the above
A. W = F X D
Engine horsepower decreases by_________% for each_________degrees above a baseline of 60°f (16°c) A. 2.5, 20 B. 1, 10 C. 5, 5 D. 4, 10
B. 1, 10
Torque is the _________________________. A. Measured with a horse B. A measurement of force C. A measurement of how fast work is done D. The amount of power needed to overcome the internal friction within an engine
B. A measurement of force
_____ is that property of matter by which any physical body persists in its state of rest or uniform motion until acted upon by an external force. A. Tension B. Inertia C. Balance D. None of the above
B. Inertia
Which description best defines the term "Torque" within an engine context? A. The action of a spinning flywheel B. The ground speed of a lawn mower C. The rotational force at the crankshaft D. None of the above
C. The rotational force at the crankshaf
Engine horsepower decreases ________% for every___________feet above sea level. A. 10.5, 2000 B. 5, 1000 C. 25, 5000 D. 3.5, 1000
D. 3.5, 1000
Use a __________________ to measure engine output in torque or horsepower. A. Application of tangential algorithms (from charts) B. Koloskimeter C. Reeves calorimeter D. Dynamometer
D. Dynamometer
What is excess torque converted into? A. Wasted energy B. Increased engine noise C. Useful energy D. Speed
D. Speed
15 : 1 is the optimum air/fuel ratio by weight for NORMAL combustion. A. TRUE B. FALSE
FALSE
Adjusting the maximum RPM higher than the specified setting allows for more power. A. TRUE B. FALSE
FALSE
Air density decreases as ambient temperature decreases. A. TRUE B. FALSE
FALSE
Heat always flows from an area of lower temperature to an area of higher temperature. A. TRUE B. FALSE
FALSE
The addition of a 3/8" X 6" extension to 3/8" drive torque wrench will increase the torque value of a fastener by 50%. A. TRUE B. FALSE
FALSE
When an engine has a compression ratio of 6:1, it means that the volume of the crankcase is 1/6th as much when the piston is closest to the crankshaft than it is when the piston is farthest from the crankshaft. A. TRUE B. FALSE
FALSE
An engine with a longer stroke produces more torque than an engine with a shorter stroke that has the same displacement. A. TRUE B. FALSE
TRUE
An increase in engine displacement increases the air-fuel mixture in the cylinder and creates more power. A. TRUE B. FALSE
TRUE
Friction Horsepower (FHP) is the amount of power required to overcome the internal friction of engine moving parts. A. TRUE B. FALSE
TRUE
In a typical small engine, the energy required to compress the charge during the compression stroke is 1/4 the amount of gain in force produced during combustion. A. TRUE B. FALSE
TRUE
Indicated Horsepower (IHP) is the power produced inside the engine cylinder and is the sum of the useable power plus the power used to drive the engine. A. TRUE B. FALSE
TRUE
The maximum torque of a Briggs & Stratton engine can only be measured when the engine is under full load, with the throttle plate in the wide open position. A. TRUE B. FALSE
TRUE
The pressure on the piston, the size of the piston, and the length of the connecting rod, determines the amount of torque produced during the power stroke. A. TRUE B. FALSE
TRUE
The thermal efficiency of an engine is the percentage of heat energy available in the fuel converted into torque at the crankshaft. A. TRUE B. FALSE
TRUE
Volumetric efficiency is the ratio of the volume of the cylinder to the volume actually filled with a fuel-/air charge. A. TRUE B. FALSE
TRUE
Work occurs only when applied force results in motion. A. TRUE B. FALSE
TRUE
