HOW STUFF WORKS
QUIZZES

The Horsepower and Torque Quiz
by Staff
Flip through the pages of almost any automotive publication and you will see horsepower and torque listed for each vehicle. But how much do you know about these measurements? Channel your inner motorhead, and see if you can ace this quiz.

What is horsepower?

• work done over time
• mechanical transfer of energy
• nonmechanical transfer of energy

• James Joule
• Isaac Newton
• James Watt

• true
• false

What is torque?

• a linear force
• a twisting force causing rotation
• rotation over time

• Archimedes
• Isaac Newton
• Galileo

In the U.S., torque is measured in pound-feet, but what is the metric or SI unit of measure for torque?

• Newton meters
• meter-kilograms
• Newton kilometers

What was the horsepower of the first gasoline automobile, the Benz Patent Motorcar?

• 0.5 horsepower (373 watts)
• 0.75 horsepower
• 1 horsepower

Which automobile enthusiast said, "Horsepower sells cars; torque wins races"?

• Patrick Dempsey
• Ralph Lauren
• Jay Leno

How much horsepower does the 2016 Mercedes-AMG GT S produce?

• 403 horsepower (300,517 watts)
• 503 horsepower
• 603 horsepower

• torque
• horsepower
• neither

What is the torque range of an average turbocharged engine of a semitrailer?

• 500-750 pound-feet (678-1,017 Newton meters)
• 750-1,000 pound-feet
• 1,200-2,050 pound-feet

• torque
• horsepower
• neither

The Peel P50, the smallest car ever made, had how much horsepower?

• 12.2 horsepower
• 8.2 horsepower
• 4.2 horsepower

How much torque does the new Peel P50 replica produce?

• 15.9 pound-feet (22 Newton meters)
• 9.9 pound-feet
• 3.09 pound-feet

• true
• false

• speedometer
• dynamometer
• tachometer

• 746 watts
• 746 ohms
• 746 amps

How much torque does the Bugatti Veyron 16.4 Grand Sport Vitesse produce?

• 706 pound-feet (957 Newton meters)
• 906 pound-feet
• 1,106 pound-feet

What does brake horsepower measure?

• horsepower output with the drivetrain
• horsepower output without the drivetrain
• neither

Which part of a vehicle is used for measuring brake horsepower?

• the axle
• the engine's flywheel
• the rear wheels

• 15 percent
• 10 percent
• 5 percent

It takes more torque or force to move a vehicle at rest than it does to move a vehicle in motion. Which law of physics supports this statement?

• Newton's third law
• Newton's second law
• Newton's first law

At what rpm speed are torque and horsepower exactly the same?

• 5,252 rpm
• 2,525 rpm
• They are never the same.

What is the heat equivalent of 1 horsepower?

• 1,545 British thermal units
• 2,545 British thermal units
• 3,545 British thermal units

The Landini Rex 110 utility tractor has one of the highest torque ratings of any tractor. How much torque does the Landini produce?

• 30,683 pound-feet (41,601 Newton meters)
• 15,683 pound-feet
• 1,683 pound-feet

What is the horsepower rating of the Landini Rex 110 utility tractor?

• 102 horsepower
• 202 horsepower
• 302 horsepower

Electrical motor horsepower can be derived from which measurement?

• electrical input in amps
• electrical input in volts
• electrical input in watts

• Mark Donohue
• Bobby Unser
• Rick Mears

• true
• false

• 375
• 3,737
• 5,252
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