Chpt 18

Question 1

An automobile engine has 4 cylinders. What is the angle between the cylinders of the engine?

Answer 1

To find the angle between cylinders of an engine divide the number of cylinders into 720 degrees.

Question 2

Which of the following accurately describes the effect of low compression ratio in automotive engines

Answer 2

Poor fuel economy

Question 3

torque is the twisting force measured at the end of the crankshaft of a engine and measured on an

Answer 3

dyanameter

Question 4

The diameter of an engine cylinder is called the

Answer 4

bore

Question 5

Horizontally opposed 4 and 6 cylinder engines have 2 banks of cylinders that are horizontal, resulting in a low engine, and this style of engine is called the blank.

Answer 5

boxer design

Question 6

Which are the following strokes in sender of a 4 stroke engine with a piston in the engine cylinder move upward.

Answer 6

compression, stroke and exhaust.

Question 7

Ignition coil present in automotive engines increased battery voltage by.

Answer 7

5000 to 40000 volts?

Question 8

While some older engines were air cooled, all current production passenger vehicle engines are cooled by circulating blank coolant through the passages in the block and cylinder head.

Answer 8

Anti freeze

Question 9

Which of the following components of an engine is constructed of cast iron or aluminum and provides the foundation for most engine components and systems

Answer 9

Block

Question 10

Which of the following is true of automotive engines

Answer 10

The pressure developed within the combustion chamber of automotive engines is used to generate mechanical force.

Question 11

2 technicians were discussing the rotating assembly in engines of vehicles. Technician A says the pistons are connected to connecting rods, which is connects the piston to the crankshaft

Answer 11

Technician A

Question 12

technician B stated that the crankshaft converts the rotary motion of the pistons to up and down motion, which is then transmitted to the drive wheels and propels the vehicles.

Answer 12

False

Question 13

Which of the following is true of automotive engines

Answer 13

The pressure developed within the combustion chamber of automotive engines is used to generate mechanical force.

Question 14

2, techs were discussing the components of the ignition system in engines. Technician. A stated that the spark plugs in the initial system increased battery voltage to 5000 to 40000 volts

Answer 14

Neither

Question 15

technician b state the ignition coils provide an air gap inside the cylinder where the spark occurs to start combustion

Answer 15

False

Question 16

Which of the following is true of engine parts and systems?

Answer 16

Exhaust manifolds must be able to withstand hot gases.

Question 17

2 technicians were discussing the operation of a 4 stroke engine technician, a stated that each cycle of events requires the engine crank shaft to make 2 complete revolutions.

Answer 17

True

Question 18

Tunisian b stated that the lesser the number of cylinders the closer together the power strokes of the individual cylinders will occur.

Answer 18

False

Question 19

Which of the following is true of the operation of a 4 stroke engine

Answer 19

Each cycle of events require that the engine crank shaft to make 2 complete revolutions.

Question 20

Technician. A stated that an engine with fewer cylinders is smoother operating because the power pulses produced by the power strokes are more closely spaced.

Answer 20

False

Question 21

Technician b stating that horizontally opposed 4 and 6 cylinder engines have 2 banks of cylinders that are horizontal resulting in a low engine.

Answer 21

True

Question 22

Horsepower is expressed in units of

Answer 22

Pounds feet

Question 23

The cooling flow through the radiator is controlled by the.

Answer 23

Thermostat

Question 24

Torque is expressed in units of

Answer 24

Foot pounds

Question 25

All overhead valve engines.

Answer 25

Have the valves located in the cylinder head?

Question 26

And sohc v 8 engine as how many cam shafts.

Answer 26

Four

Question 27

A normally aspirated automobile engine loses about blank power per 1000 foot of altitude.

Answer 27

3 percent

Question 28

One cylinder of an automobile four stroke engine completes a cycle. every

Answer 28

720 degrees

Question 29

How many rotations of the crankshaft are required to complete each stroke of a 4 stroke cylinder engine?

Answer 29

One half

Question 30

Technician a says that a crane shaft determines the stroke of an engine. Technician b says that the length of the connecting rod determines the stroke of an engine

Answer 30

Technician a

Question 31

Rotating force is called

Answer 31

torque