MN Small and Large Engines 2019 Flashcards
When checking value-tappet clearance, place cylinder at:
TDC of compression stroke
What does TDC stand for?
Top Dead Center
A common compression ratio for a diesel engine is
16 to 1
The principle which states that air flow will increase and air pressure decrease through a narrowed
passage is known as:
Bernoulli’s principle
What does BDC stand for?
Bottom Dead Center
The difference in angle between the valve face and the valve seat is called the:
Interference Angle
Oil in the cylinder is usually an indication of a worn what?
Intake Valve Guide
A glossy, dry appearance to the insulator nose of a spark plug is a sign of
Overheating
A number of 5W-30 on an oil container identifies its
Viscosity
Bent valve stems and push rods are typically caused by
Lack of Tappet Clearance
What is another name for tappert?
Lifter or Cam Follower
The side-to-side movement of a crankshaft in the block is referred as its
Endplay
New valves must be ______________ prior to installation to assure a perfect seal.
Lapped
Bernoulli’s principle states that air flowing through a narrowed portion of a tube increases in velocity
and decreases in pressure. The application of this principle is used in a(n):
Carburetor Venture
The wear in an engine cylinder that is defined as the difference in cylinder diameter at points 90
degrees apart in the same plane is called?
Out of Round
Which of the following will results in excessive black engine exhaust:
Rich Air Fuel Ratio
A ______________ is an integral thin cast strip designed to provide efficient air circulation and
dissipation of heat away from the engine cylinder block into the air stream.
Cooling FIN
The purpose of the primary winding in an ignition system is:
to induce current into the secondary winding to fire the spark plug.
. The part of the engine valve that makes contact with the valve seat to seal the combustion chamber is
called the:
Valve Face
The intake manifold of the diesel engine allows
Air to enter the cylinder past the intake valve
When referring to diesel fuel grades what fuel has a higher volatility?
no. 1 diesel fuel is a higher class of volatile fuel than no. 2
The ____________ transmits power to the driving axles and allows the two rear wheels to turn at
different rates of speed while still propelling their share of the load:
Differential
What tool is used to check the freezing protection of an antifreeze solution?
Hydrometer
What is the name of the stroke in a 4 stroke engine, if the piston is moving down and the
intake valve is open?
Intake Stroke
In a 2 stroke engine, what two things occur in the same stroke?
Intake and Compression
. What other two things occur in the other stroke of a two stroke engine?
Power and Exhaust
What is the name of the stroke in a 4 stroke engine for the stroke in which both valves are
closed and the piston is moving upward?
Compression
