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The Ultimate Repairing a Small Engine Quiz
by Staff
So many of our tools and toys are powered by small engines. Think lawnmowers, chainsaws, outboard boats and snowmobiles. It's a good idea to have a working knowledge of how these systems work and what to do when they don't.

What is the best system for servicing your small engine?

  • wait till it breaks
  • annual checks
  • regular maintenance

What are small gas engines usually cooled by?

  • air
  • water
  • refrigeration

What’s the first step to any small engine repair?

  • Disconnect the spark plugs.
  • Drain all the gasoline.
  • Put the car in reverse so it can’t accidentally run you over.

What should battery terminals be cleaned with?

  • a damp rag
  • engine cleaning solution
  • baking soda and a wire brush

What does the term “viscosity” describe?

  • meltiness
  • life expectancy
  • thickness

Which of the following small engine parts are an example of a wear part?

  • block
  • bearings
  • turbocharger

Most small engines can be repaired using standard general procedures, but some have specific or unusual requirements. What’s the best way to proceed if you’re stuck?

  • Contact the manufacturer.
  • Throw it away and buy a new one.
  • Post on Reddit.

If there is white or blue smoke coming from the tailpipe, what might be wrong?

  • The engine may be burning oil.
  • The catalytic converter could be on fire.
  • Your exhaust fluid reservoir needs to be refilled.

Which of the following are types of ignition systems used with small engines?

  • magneto-powered and battery-powered
  • battery-powered and throttle-powered
  • mechanical-breaker and rechargeable-battery

What force does a mechanical governor use to determine the load on an engine?

  • force of gravity
  • centrifugal force
  • air pressure

What does a choke do?

  • controls the amount of fuel moving through the lines
  • controls the amount of air entering the fuel
  • controls the amount of throttle the driver can apply

What does fuel stabilizer do?

  • preps the fuel system for replacement
  • preps the fuel system for storage
  • turns the fuel from gasoline into water

How long does it take for gasoline to break down?

  • never
  • a week
  • a month

What do four-stroke engines mix in with gasoline?

  • oil
  • water
  • air

What controls the speed of the engine?

  • the throttle
  • the carburetor
  • the muffler

In a mechanical breaker ignition system, what provides the spark to ignite the fuel?

  • a battery
  • a magnet
  • electricity

What component delivers the engine's power to the various parts of the machine (e.g. the wheels, the blades)?

  • the flywheel
  • the crankshaft
  • the connecting rod

How often should you change your engine oil?

  • after every 25 hours of use
  • after every 45 hours of use
  • after every 60 hours of use

What are in-line fuel filters usually made of?

  • a metal mesh screen
  • disposable, pleated paper
  • a plastic sediment bowl

What are the two types of air cleaners used in a small engine?

  • oil bath and dry
  • paper and metal
  • dry and metal

How many types of carburetors are usually used in small engines?

  • one
  • two
  • three

How many systems does a gasoline powered engine have?

  • one
  • three
  • six

What will an incorrectly adjusted governor do to an engine?

  • It will damage or destroy it.
  • It will slow the engine down.
  • It will use up large amounts of fuel.

What should the density of a conventional battery cell be?

  • 0.1 to 0.2
  • 1.26 to 1.28
  • 1.9 to 2.1

How much voltage does a new spark plug require?

  • 2, 000 volts
  • 5, 000 volts
  • 10, 000 volts

What should you use to mix the correct ratio of oil and fuel for your engine's lubricating system?

  • special mixing bowl provided by the manufacturer
  • any non-metal mixing bowls
  • a vented gas can only for mixing purposes

What is the most common viscosity for lubricating grease?

  • 20-30
  • 50-60
  • 80-90

What temperature does an internal combustion engine reach?

  • 500 degrees Fahrenheit (260 degrees Celsius)
  • 2, 800 degrees Fahrenheit (1, 538 degrees Celsius)
  • 4, 500 degrees Fahrenheit (2, 200 degrees Celsius)

How are most single-cylinder engines cooled?

  • through petroleum
  • through air
  • through electricity, in a similar way to a refrigerator

Which of the following problems could cause the engine to overheat?

  • a leaky or blown gasket
  • fouled spark plugs
  • a missing engine shroud