Is gas at the spark plug?
Engine Diagnosis Quiz 2/12

Quiz
•
Other
•
12th Grade
•
Medium
Used 1+ times
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15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
Flooded
Dry
Answer explanation
If gas is at the spark plug, it indicates that the engine is flooded. A flooded engine occurs when too much fuel enters the combustion chamber, preventing proper ignition. Therefore, the correct answer is 'Flooded'.
2.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
Is there spark? Is the gap correct? 0.25-0.030?
The question has a diagram associated with it. The diagram has been stored separately.
No, the gap is incorrect.
Yes, the gap is correct.
There is no spark.
Answer explanation
The question references a diagram that is crucial for determining the correctness of the gap. Without the diagram, we cannot definitively assess the gap or the presence of a spark.
3.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
Compression is ... ? On compression stroke (4 or 2 Stroke, Diesel) Piston travels up Valves closed/sealed Piston/rings/cylinder/gasket are sealed Need to be timed properly
Piston travels down
Valves open
Piston travels up
Piston/rings/cylinder/gasket are not sealed
Answer explanation
During the compression stroke, the piston travels up while the valves remain closed. This ensures that the piston, rings, cylinder, and gasket are sealed, allowing for effective compression in the engine.
4.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
What is one possible cause of compression loss due to worn or damaged valves?
Loose head bolts
Push rod/tappet
Blown head gasket
Timing off
Answer explanation
Worn or damaged valves can lead to compression loss, and issues with the push rod or tappet can affect valve operation, causing improper sealing. This makes 'Push rod/tappet' a valid cause of compression loss.
5.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
Which of the following can lead to compression loss due to loose components?
Loose head bolts/spark plug
Damaged piston/rings/cylinder
Blown head gasket
Timing off
Answer explanation
Loose head bolts or spark plugs can cause a loss of compression as they may not maintain proper sealing, leading to leaks. This directly affects engine performance, making this the correct choice.
6.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
A 'Worn valve' has what impact on compression loss in the valve train?
No impact
Increases compression loss
Decreases compression loss
Improves valve efficiency
Answer explanation
A worn valve can lead to improper sealing, allowing air to escape during the compression stroke. This results in increased compression loss, making 'Increases compression loss' the correct choice.
7.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
How can 'bent, broken' components affect compression loss in the valve train?
They can cause increased compression loss.
They have no effect on compression loss.
They improve compression efficiency.
They only affect the exhaust system.
Answer explanation
Bent or broken components in the valve train can disrupt the sealing surfaces, leading to increased gaps. This results in a loss of compression, making the correct choice 'They can cause increased compression loss.'
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