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