MN Small and Large Engines 2019

Question 1

When checking value-tappet clearance, place cylinder at:

Answer 1

TDC of compression stroke

Question 2

What does TDC stand for?

Answer 2

Top Dead Center

Question 3

A common compression ratio for a diesel engine is

Answer 3

16 to 1

Question 4

The principle which states that air flow will increase and air pressure decrease through a narrowed
passage is known as:

Answer 4

Bernoulli’s principle

Question 5

What does BDC stand for?

Answer 5

Bottom Dead Center

Question 6

The difference in angle between the valve face and the valve seat is called the:

Answer 6

Interference Angle

Question 7

Oil in the cylinder is usually an indication of a worn what?

Answer 7

Intake Valve Guide

Question 8

A glossy, dry appearance to the insulator nose of a spark plug is a sign of

Answer 8

Overheating

Question 9

A number of 5W-30 on an oil container identifies its

Answer 9

Viscosity

Question 10

Bent valve stems and push rods are typically caused by

Answer 10

Lack of Tappet Clearance

Question 11

What is another name for tappert?

Answer 11

Lifter or Cam Follower

Question 12

The side-to-side movement of a crankshaft in the block is referred as its

Answer 12

Endplay

Question 13

New valves must be ______________ prior to installation to assure a perfect seal.

Answer 13

Lapped

Question 14

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):

Answer 14

Carburetor Venture

Question 15

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?

Answer 15

Out of Round

Question 16

Which of the following will results in excessive black engine exhaust:

Answer 16

Rich Air Fuel Ratio

Question 17

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.

Answer 17

Cooling FIN

Question 18

The purpose of the primary winding in an ignition system is:

Answer 18

to induce current into the secondary winding to fire the spark plug.

Question 19

. The part of the engine valve that makes contact with the valve seat to seal the combustion chamber is
called the:

Answer 19

Valve Face

Question 20

The intake manifold of the diesel engine allows

Answer 20

Air to enter the cylinder past the intake valve

Question 21

When referring to diesel fuel grades what fuel has a higher volatility?

Answer 21

no. 1 diesel fuel is a higher class of volatile fuel than no. 2

Question 22

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:

Answer 22

Differential

Question 23

What tool is used to check the freezing protection of an antifreeze solution?

Answer 23

Hydrometer

Question 24

What is the name of the stroke in a 4 stroke engine, if the piston is moving down and the
intake valve is open?

Answer 24

Intake Stroke

Question 25

In a 2 stroke engine, what two things occur in the same stroke?

Answer 25

Intake and Compression

Question 26

. What other two things occur in the other stroke of a two stroke engine?

Answer 26

Power and Exhaust

Question 27

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?

Answer 27

Compression