mid term 1 part 1

Fastest crankshaft speed occurs during which stroke?

• Compression

• Intake

• Overlap

• Power

Technician A says crankshafts convert the up-and-down, or reciprocating, movement of pistons to rotational movement. Technician B says engine power is transmitted through the crankshaft to the flywheel where the power train connects to the engine. Who is correct?

• Technician A

• Technician B

• Both Technician A and Technician B

• Neither Technician A nor Technician B

Which of the following is correct concerning cylinder blocks?

• The engine block is the main structure of the engine and encloses the cylinders and crankshaft

• The block has two main sections: the cylinder block, which contains the cylinders, and the crankcase, which contains the crankshaft

• Noise vibration and harshness produced by diesels' high combustion pressures are also controlled through a variety of block construction features.

• All of these are correct.

 Which of the following is correct concerning compression rings?

• Compression rings are located nearest the piston crown.

• Their primary job is to prevent gases from leaking past the piston during compression and power stroke.

• Both A and B

• Neither A nor B

. All of the following are caused by worn piston rings, EXCEPT __________.

• Excessive blow-by

• Low power

• Loss of compression

• Engine overheating

Technician A says the full floating piston pin allows the piston to rotate on the pin and keeps the connecting rod fixed to the pin. Technician B says when a full floating pin is used, the arrangement requires a bushing in the small end of the connecting rod. Who is correct?

• Technician A

• Technician B

• Both Technician A and Technician B

• Neither Technician A nor Technician B

Which manufacturing process is used to smooth over any microscopic cracks or pores within a connecting rod after manufacture?

 

• Hammering

• Forging

• Shot peening

• Induction hardening

What determines the overall geometry of the cylinder head?

• The shape and position of the intake and exhaust ports

• The position of the valves

• The location of the camshaft

• All of these are correct.

Which component is not part of the cylinder head?

• Valve train components

• Fuel injectors

• Camshaft

• Water pump

 An engine with the camshaft in the cylinder head will not require a __________.

• Valve guide

• Pushrod

• Rocker

• Valve spring