Engine Component Identification and Repair Self-Test Flashcards
True or False;
The engine flywheel should be pinned and locked out before entering the crankcase.
True
True or False;
An underslung crank has the main bearing caps at the bottom of the crank.
True
True or False;
Maximum deck warpage of a block is checked with a straight edge and dial gauge.
False
True or False;
Cylinder liners on large engines may be repaired by hard chroming and grinding to size.
False
True or False;
Worn or scored cylinder liners affect engine performance and oil consumption, and lead to increase in crankcase pressure.
True
True or False;
Aluminum pistons are fitted tighter than cast iron pistons.
False
-fitted looser as aluminium has greater thermal expansion properties over cast iron
True or False;
Cam ground aluminum pistons measured at room temperature are out-of-round.
True
True or False;
Drilled holes in the piston’s oil ring groove drains oil back to the crankcase.
True
True or False;
Rings are installed with the dot, notch, or number toward the crankshaft.
False
Dot faces up(towards pressure)
True or False;
Ring gaps should be lined up one above the other prior to piston installation
False
module; stagger ring end gaps so gaps are 180 degrees apart from each other
True or False;
A ring should be able to recede into the ring groove by its full radial thickness.
False
True or False;
Oil control rings depend only on their expanders to maintain contact with the cylinder walls.
True
True or False;
Advancing a nut 120° after 50 lb-ft torque is called the torque turn method.
True
True or False;
The connecting rod bearing clearance can be checked by the lift check method.
True
True or False;
After torquing the connecting rod bolts the rod should be checked for adequate side clearances.
True
True or False;
Crankshafts should be stored by standing them on end, or on a level floor on “V” blocks for larger crankshafts
True
True or False;
Four stroke six cylinder engines should have 60° between power strokes.
False
720/6=120
True or False;
The cam lobe opens the valve; the valve spring forces the valve closed.
True
True or False;
The best method of checking a cylinder head for coolant leaks would be to use the hot water and pressure method.
True
True or False;
A valve seat ground too wide will cool the valve better but will trap carbon.
True
True or False;
The greatest degree of wear on the cylinder liner is on the top of the ring travel 90° to the crankshaft.
True
True or False;
Liner cavitation is caused by air getting into the cooling system.
False
vibration I think?
True or False;
Valve overlap occurs when both the intake and exhaust valves are open and the piston is near TDC.
True
True or False;
The purpose of the flywheel is to keep the engine in balance.
False
-keep the engine running smooth
True or False;
When you have a camshaft gear on a four-stroke engine with 42 teeth, the crankshaft will have 24 teeth.
False
True or False;
A valve bridge is used on many industrial engines because two valves can be opened with one cam lobe.
True
