External combustion means that the fuel is being burned outside of the engine, while internal combustion means the fuel is burned inside of the engine.

______ the diameter of the bore or ______ the length of the stroke will produce a larger piston displacement.

The air-fuel mixture is ignited and burns rapidly, at up to about ______.

Technician A says that an interference type engine has minimal clearance between the valves and the piston. Technician B says that in a noninterference engine, if the timing belt was to break, you could bend a valve. Who is correct?

A broken timing belt on an interference engine means ______.

A long block engine replacement still requires swapping parts from the original engine to the short block, including the intake and exhaust manifolds, fuel injection system, starter, alternator, power steering pump, and air-conditioning compressor.

The reed valve is made of _______ and can be attached to the crankcase or to the inlet port.

Technician A says that reed valves are used to let air and fuel into the combustion chamber on four-stroke engines. Technician B says that in a four-stroke engine, the engine oil is mixed with gasoline. Who is correct?

Technician A says that the rotary engine does not need to convert reciprocal motion into rotary motion. Technician B says that the rotor is roughly triangular and turns inside of a housing. Who is correct?

The rotary combustion (RC) engine has found its way into automobiles, planes, helicopters, boats, motorcycles, lawn mowers, and other applications.

Which of the following statements is true with respect to a rotary engine?

Technician A says that the Apex seals in a rotary engine act like piston rings. Technician B says that the rotor is mounted in a rectangular housing. Who is correct?

With a(n) ________, instead of mixing the fuel/air in the intake manifold, it mixes in the combustion chamber.

The overhead cam engine system is more complicated than the OHV engine due to the need for enhanced oiling at the top of the engine for the ______.

_______ is a measure of the amount of pressure the valve spring is exerting to overcome the inertia of the valve train as the valve reaches its fully opened position.

All the statements below are true EXCEPT:

Tech A says that valve overlap occurs between the exhaust stroke and the intake stroke. Tech B says that valve overlap occurs to assist in scavenging the cylinder. Who is correct?

Technician A says that when the lifter is on the base circle of the cam lobe, the valve is closed. Technician B says that the cam-in-block lifter rides directly against the valve. Who is correct?

Which of the following is NOT a style of pushrod end?

When oil inside of an engine's valve cover penetrates the edge of the valve cover gasket material, it may be designed to swell by approximately ____.

One caution when using RTV silicone is to make sure you use oxygen sensor - safe RTV on engines equipped with oxygen sensors.

When deciding whether to reuse valve springs, Technician A says a valve spring is sure to have correct pressure if it passes the height and squareness tests. Technician B says a valve spring that is not square can cause premature wear to the guide and stem. Who is correct?

When the valve stem clearance is excessive, there is:

In _______ cylinder heads, the metal is too hard of a surface for the camshaft journals to ride on, so bearing inserts are used in the camshaft towers.