Engine Repair (A1)Question 6 of 120
A mechanic measures cylinder taper by comparing bore diameter at the top of ring travel to the bottom. This measurement is taken with a:
a.Feeler gauge
b.Dial bore gauge or inside micrometer
c.Vacuum gauge
d.Compression tester
Explanation
Cylinder taper and out-of-round are measured with a dial bore gauge or inside micrometer at several points in the bore. Wear is greatest at the top of ring travel where combustion heat and pressure are highest. Excessive taper requires boring and oversize pistons.
Practice all 120 questions free — no signup required.
Related questions on this topic
- A valve that fails to seat fully will most directly cause which condition?
- On an overhead-cam engine, excessive valve lash (clearance) most commonly produces which symptom?
- Technician A says the PCV system routes crankcase blow-by vapors into the intake to be burned. Technician B says a stuck PCV valve can cause rough idle or oil leaks. Who is correct?
- Technician A says low oil pressure only at idle on a high-mileage engine can be caused by worn bearing clearances. Technician B says a worn oil pump or diluted oil can also lower pressure. Who is correct?
- Which cooling-system component regulates coolant flow based on engine temperature?
- A radiator pressure cap raises the system's boiling point primarily because:
Last reviewed: · editorial process
PrepPass Editorial Team · Verified against ASE Automobile Certification Series (A1–A8) · How we review