Deck 1: Engine Operation

Question 1

Most of today's cars are powered by _____-cycle engines.

A) Rudolph
B) Otto
C) Ford
D) Hemi

Answer 1

B

Question 2

The ideal air-fuel mixture for a gasoline engine is _____.

A) 13.5:1
B) 16:1
C) 10.5:1
D) 14.7:1

Answer 2

D

Question 3

What proportion of gross horsepower is consumed by all of the accessories on a modern engine?

A) 10%
B) 25%
C) 30%
D) 50%

Answer 3

B

Question 4

Two technicians are discussing "blowby." Technician A says that "blowby" is gases escaping past the valves. Technician B says that "blowby" is gases escaping past the rings. Which technician is correct?

A) Technician A
B) Technician B
C) Both technicians
D) Neither technician

Question 5

What is the purpose of the harmonic balancer?

Question 6

What cylinder number is the closest to the front of the engine on almost all V-type engines?

A) 1
B) 2
C) 4
D) 6

Question 7

What cylinder arrangement is popular with designers when an engine has more than four cylinders?

A) radial
B) opposed
C) in-line
D) V-type

Question 8

A two stroke engine has a power stroke every other crankshaft revolution.

Question 9

What is the difference between a short block and a long block?

Question 10

Two technicians are discussing the power stroke. Technician A says that on a V8 engine, a power stroke occurs every 90 degrees. Technician B says that on an inline six-cylinder engine, the power stroke occurs every 120 degrees. Which technician is correct?

A) Technician A
B) Technician B
C) Both technicians
D) Neither technician

Question 11

Technician A says that the I-head engine is widely used in automobiles because it can breathe better than earlier engine designs. Technician B says that increased valve lift is possible with an I-head engine. Which technician is correct?

A) Technician A
B) Technician B
C) Both technicians
D) Neither technician

Question 12

How many degrees is a complete cycle on a four stroke engine?

A) 120
B) 180
C) 360
D) 720

Question 13

Describe the major differences in the diesel and gasoline engines.

Question 14

Which of the following is NOT an Otto-cycle engine?

A) radial
B) v-type
C) opposed
D) in-line

Question 15

Technician A says that most automotive gasoline engines have four strokes per cycle. Technician B says that the crankshaft makes four revolutions during the four-stroke cycle. Which technician is correct?

A) Technician A
B) Technician B
C) Both technicians
D) Neither technician

Question 16

The I-head engine has the valves in the block.

Question 17

The camshaft controls the rate at which the engine breathes.

Question 18

The gasoline engine is also known as a spark ignition engine.

Question 19

In four stroke engine operation, gasoline will not burn unless it is mixed with the correct amount of air.

Question 20

Briefly explain how the ignition works in a diesel engine.