310T EVALUATION EXAM 2026/2027 QUESTIONS AND
SOLUTIONS RATED A+
✔✔What is the correct procedure for boring cylinders in a parent bore engine?!
Bore to the new piston size plus the clearance
Bore to the new piston skirt diameter
Hone to the new piston size and bore to the clearance specification
Bore to specified size and hone to the clearance specification - ✔✔Bore to specified
size and hone to the clearance specification
✔✔When measuring a cylinder, what is being measured by taking diameter readings at
the top, middle, and bottom of ring travel?!
Piston clearance
Cylinder alignment
Cylinder taper
Cylinder out-of-round - ✔✔Cylinder taper
✔✔When is crankshaft noise more noticeable?!
When the engine is cold
When the engine is at low idle
When the engine is hot
The noise should not change with temperature or rpm - ✔✔When the engine is hot
✔✔During a cylinder leakage test, what would be the cause of air escaping from the oil
fill port?!
Worn or weak piston rings
A burnt or poor sealing exhaust valve
A burnt or poor sealing intake valve
Cylinder liner cavitation - ✔✔Worn or weak piston rings
✔✔Which one of the following cylinder head components, when worn, would allow oil to
enter the exhaust gases or intake charge?!
The valve margin
The valve face
The valve seat
The valve guide - ✔✔The valve guide
✔✔What is the preferred method of running-in a rebuilt engine?!
Perform a dynamometer test run
Road test with service brakes applied
Test driving the truck with an empty trailer
Test driving the truck with a loaded trailer - ✔✔Perform a dynamometer test run
✔✔What is the maximum inlet restriction permitted on a diesel engine air filter?!
, 5" H2O
10" H2O
25" H2O
50" H2O - ✔✔25" H2O
✔✔Which of the following could occur if there was insufficient liner protrusion?!
Insufficient sealing
Liner flange damage would occur
Over-cooling of the cylinder head
The engine would overheat - ✔✔Insufficient sealing
✔✔Which of the following could result from a worn cylinder counter-bore?!
Excessive sleeve protrusion
Upper sleeve flange separation
Sleeve cavitation
Piston damage during installation - ✔✔Upper sleeve flange separation
✔✔After performing cylinder work such as boring or honing, what should be used to
clean the cylinder walls?!
Fresh engine oil
A soap and water solution
Solvent
Gasoline - ✔✔A soap and water solution
✔✔When rebuilding an engine with a camshaft located in the cylinder block, what would
result from a failure to replace worn camshaft bearings?!
Noisy valve operation
Noise during high engine loads only
Lower oil pressure readings
Premature camshaft gear - ✔✔Lower oil pressure readings
✔✔What should be done before initial start-up of a rebuilt engine?!
Perform a compression test
Perform a cylinder leakage test
Release the parking brakes
Prime the lubrication system - ✔✔Prime the lubrication system
✔✔When testing a gasoline engine, what would cause a vacuum gage to produce an
intermittent reading?!
A burnt valve
Worn piston rings
A loose or leaking intake manifold gasket
Worn valve guides - ✔✔A burnt valve
SOLUTIONS RATED A+
✔✔What is the correct procedure for boring cylinders in a parent bore engine?!
Bore to the new piston size plus the clearance
Bore to the new piston skirt diameter
Hone to the new piston size and bore to the clearance specification
Bore to specified size and hone to the clearance specification - ✔✔Bore to specified
size and hone to the clearance specification
✔✔When measuring a cylinder, what is being measured by taking diameter readings at
the top, middle, and bottom of ring travel?!
Piston clearance
Cylinder alignment
Cylinder taper
Cylinder out-of-round - ✔✔Cylinder taper
✔✔When is crankshaft noise more noticeable?!
When the engine is cold
When the engine is at low idle
When the engine is hot
The noise should not change with temperature or rpm - ✔✔When the engine is hot
✔✔During a cylinder leakage test, what would be the cause of air escaping from the oil
fill port?!
Worn or weak piston rings
A burnt or poor sealing exhaust valve
A burnt or poor sealing intake valve
Cylinder liner cavitation - ✔✔Worn or weak piston rings
✔✔Which one of the following cylinder head components, when worn, would allow oil to
enter the exhaust gases or intake charge?!
The valve margin
The valve face
The valve seat
The valve guide - ✔✔The valve guide
✔✔What is the preferred method of running-in a rebuilt engine?!
Perform a dynamometer test run
Road test with service brakes applied
Test driving the truck with an empty trailer
Test driving the truck with a loaded trailer - ✔✔Perform a dynamometer test run
✔✔What is the maximum inlet restriction permitted on a diesel engine air filter?!
, 5" H2O
10" H2O
25" H2O
50" H2O - ✔✔25" H2O
✔✔Which of the following could occur if there was insufficient liner protrusion?!
Insufficient sealing
Liner flange damage would occur
Over-cooling of the cylinder head
The engine would overheat - ✔✔Insufficient sealing
✔✔Which of the following could result from a worn cylinder counter-bore?!
Excessive sleeve protrusion
Upper sleeve flange separation
Sleeve cavitation
Piston damage during installation - ✔✔Upper sleeve flange separation
✔✔After performing cylinder work such as boring or honing, what should be used to
clean the cylinder walls?!
Fresh engine oil
A soap and water solution
Solvent
Gasoline - ✔✔A soap and water solution
✔✔When rebuilding an engine with a camshaft located in the cylinder block, what would
result from a failure to replace worn camshaft bearings?!
Noisy valve operation
Noise during high engine loads only
Lower oil pressure readings
Premature camshaft gear - ✔✔Lower oil pressure readings
✔✔What should be done before initial start-up of a rebuilt engine?!
Perform a compression test
Perform a cylinder leakage test
Release the parking brakes
Prime the lubrication system - ✔✔Prime the lubrication system
✔✔When testing a gasoline engine, what would cause a vacuum gage to produce an
intermittent reading?!
A burnt valve
Worn piston rings
A loose or leaking intake manifold gasket
Worn valve guides - ✔✔A burnt valve
