NEW
Font size
WorksheetsEngine Repair 2 Mid term
Total questions: 20
Worksheet time: 10mins
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.
Cast iron
Aluminum
Steel
Copper
The air-fuel mixture is ignited and burns rapidly, at up to about ______.
3,000°F
3,500°F
4,000°F
4,500°F
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.
True
False
Which of the following statements is true with respect to a rotary engine?
The rotor is mounted in a cylindrical housing.
There is no reciprocating motion.
The engine produces one power pulse per rotor rotation.
The engine produces more vibration when compared to other ICEs.
______ the diameter of the bore or ______ the length of the stroke will produce a larger piston displacement.
Increasing; increasing
Increasing; decreasing
Decreasing; increasing
Decreasing; decreasing
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?
Technician A
Technician B
Both A and B
Neither A nor B
The reed valve is made of _______ and can be attached to the crankcase or to the inlet port.
Spring metal
Heavy plastic
Aluminum alloy
Cast iron
When the valve stem clearance is excessive, there is:
a valve that is burned.
more oil passing through the guide.
less smoke emission from exhaust pipe.
less oil consumption.
All the statements below are true EXCEPT:
The timing of the valves is controlled by the physical shape and position of the cam lobes on the cam shaft.
Racing engines are designed to minimize the effect of the column inertia encountered at higher rpm.
Valve timing is critical to the proper operation of the ICE.
On variable valve timing engines, the valve timing can be modified to provide the best
With a(n) ________, instead of mixing the fuel/air in the intake manifold, it mixes in the combustion chamber.
Oval combustion chamber
Wedge combustion chamber
Gas direct injection cylinder head
Bathtub combustion chamber
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 ____.
10%
20%
30%
40%
One caution when using RTV silicone is to make sure you use oxygen sensor - safe RTV on engines equipped with oxygen sensors.
True
False
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?
Technician A
Technician B
Both A and B
Neither A nor B
Which of the following is NOT a style of pushrod end?
Ball to ball
Cup to adjustable tip
Ball to adjustable tip
Ball to cup
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?
Technician A
Technician B
Both A and B
Neither A nor B
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 ______.
Camshaft
Lifters
Followers
All the above
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?
Tech A
Tech B
Both A and B
Neither A nor B
A broken timing belt on an interference engine means ______.
A huge repair expense
The entire engine could need to be replaced
The entire engine will need to be replaced
Both A and B
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.
True
False
As ____ is a twisting or turning force, ____ is the rate (in time and distance) at which that force (_____) is produced.
Torque; horsepower; torque
Torque; horsepower; horsepower
Horsepower; torque; horsepower
Horsepower; torque; torque
