What does a leak-down test measure in an engine?
Engine Leak-Down Test Quiz

Quiz
•
Mathematics
•
University
•
Easy

Jason Nesbitt
Used 2+ times
FREE Resource
20 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Oil pressure
Cylinder leakage percentage
RPM
Fuel pressure
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What must be done before performing a leak-down test?
Drain the oil
Remove the spark plugs
Turn on the AC
Add octane booster
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which position should the piston be in during a leak-down test?
Bottom Dead Center (BDC)
Any position
Top Dead Center (TDC) on compression stroke
TDC on exhaust stroke
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A high leakage reading typically indicates:
Strong compression
Normal operation
An internal problem
A good valve seat
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary tool used for a leak-down test?
Vacuum gauge
Compression tester
Leak-down tester with regulator and gauges
Torque wrench
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a normal cylinder leakage percentage?
0–5%
10–15%
50–60%
70–80%
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Leakage through the oil filler cap usually indicates a problem with:
Head gasket
Exhaust valve
Piston rings
Intake valve
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