Deck 15: Introduction to the Engine

Question 1

When the air-fuel mixture is measured by volume, there are 100,000 gallons of air for each gallon of gasoline.

Answer 1

False

Question 2

The part that will MOST-Likely be used to close the valve after it has been opened by the cam lobe is the:

A)valve margin
B)valve port
C)valve spring
D)valve stem

Answer 2

C

Question 3

The front of an engine has all of the following EXCEPT:

A)a valve train
B)a camshaft drive
C)a timing cover or front cover
D)a crankshaft vibration damper

Answer 3

A

Question 4

While discussing pulleys, Technician A says that some engines use a vibration damper to minimize vibrations in the crankshaft that could cause it to crack or break. Technician B says that some engines do not use a damper. Instead they have a single-piece pulley with threaded holes to attach the drive belt pulley(s). Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 5

One mole of air weighs approximately ____________________ ounce(s).

Question 6

Which of the following parts is LEAST-Likely to be included in the valve train?

A)Camshaft
B)Piston
C)Rocker arms
D)Pushrods

Question 7

____________________ are machined surfaces that ride inside of cam bearings. On pushrod engines, cam bearings are pressed into bores in the block.

Question 8

The term combustion chamber refers to the chambers in the cylinder heads that are located just above the pistons.

Question 9

____________________ are mounted on top of the cylinder head. They take the up-and-down motion of the pushrod and transfer it to the valve.

Question 10

The short block for a pushrod engine includes all of the following EXCEPT:

A)the head gasket
B)all bearings
C)the crankshaft
D)the piston and rod assembly

Question 11

Leakage past the piston rings is called ____.

A)valve train
B)short block
C)piston slap
D)blowby

Question 12

The area of the block where the crankshaft and bearings are located is called the ____.

A)snout
B)bearing insert
C)bone
D)crankcase

Question 13

The cam-in-block style, with two valves per cylinder, is called a(n) ____________________.

Question 14

While discussing manifolds, Technician A says that exhaust manifolds must carry very hot exhaust gases so they are usually made of cast iron. Technician B says that some manifolds are constructed of steel tubing. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 15

A fuel injection system supplies fuel to join with the air that flows through the ____________________ of the manifold.

Question 16

Most vehicles since the early 1960s have fuel injection systems with computer controls. The computer monitors the oxygen content in the vehicle's exhaust and then adjusts the fuel supply to provide the correct amount of fuel and air for each intake stroke.

Question 17

The space where the ends of the piston ring come together when the ring is installed in the cylinder is MOST-Likely referred to as a(n):

A)flywheel
B)end gap
C)oil gap
D)flexplate

Question 18

A simple reciprocating engine has a cylinder, a piston, a connecting rod, and a crankshaft.

Question 19

Intake and exhaust valves are made of the same materials.

Question 20

Which of the following is LEAST-Likely to be included in the engine's four-stroke cycle?

A)The intake stroke
B)The compression stroke
C)The inertia stroke
D)The power stroke

Question 21

Provide definitions for the following terms: valve seats, valve port, valve margin, and valve stem.

Question 22

How would you determine the volume of each individual cylinder?

Question 23

Why are there half as many teeth on the crankshaft drive as there are on the camshaft drive?

Question 24

What is the purpose of counterweights on the crankshaft?

Question 25

What is the purpose of the flywheel?