Presentación sin título

Open Ended

Why is it important to ensure efficient operation and power output in an engine?

Multiple Choice

Which of the following checks are performed on the crankshaft?

• Cleaning the camshaft

• Taper and ovality on the camshaft journals

• Cleaning the crankshaft

• Camshaft with scored journals

• Cracked camshaft

Multiple Choice

Which of the following is considered an initial test to diagnose different faults when the vehicle is in motion?

• Lack of power due to compression leaks, smoke color from the exhaust pipe, engine overheating, engine knocking.

• Lack of water due to compression leaks, fuel color from the exhaust pipe, window overheating, license plate knocking.

• Lack of power due to intake leaks, smoke color from the intake pipe, seat overheating, gearbox knocking.

Multiple Choice

What are the two main types of connecting rod pin mounting?

• Floating (free in the piston and connecting rod).

• Semi-floating (fixed in the connecting rod or piston).

• Floating (free in the piston and connecting rod) and semi-floating (fixed in the connecting rod or piston).

• Fixed (not free in either the piston or connecting rod).

Multiple Choice

What is the maximum allowable deviation for the camshaft to avoid being considered off-center?

• 0.002 inches

• 0.2 inches

• 0.02 inches

Fill in the Blank

The maximum wear limit for the valve stem is ___ (in inches).

Multiple Choice

Which of the following is the correct range for the clearance between the crankshaft journal surface and the bearing support surface?

• 0.15” to 0.3”

• 0.00 15” to 0.03”

• 0.015” to 0.03”

• 0.05” to 0.1”

Open Ended

Explain the importance of replacing air and fuel filters in a vehicle and the potential consequences of neglecting this maintenance.

Multiple Choice

What are the possible causes of knocking noises in the engine according to the text?

• Worn piston pin bushings, worn main bearing caps, worn connecting rod bushings, valve knocking.

• Loose fan belt, alternator running without lubrication, water pump running without lubrication, tappet running without lubrication.

• Lack of gasoline, lack of oil, lack of coolant, dirty air filter.

• Loose timing belt, worn camshaft, worn rocker arms, worn lifters.

Open Ended

List two main reasons why white smoke might come out of the exhaust pipe, based on the text.

Multiple Choice

Why is it important to check the flatness of the upper surface of the engine block?

• To determine if there is warping, which can damage the cylinder head gasket and cause serious consequences, requiring resurfacing of the block's upper surface.

• To check for oil leaks in the crankcase.

• To verify the lubrication clearance between the bearing and crankshaft journal.

• To check for wear in the piston rings.

Multiple Choice

Which of the following is a correct step when disassembling the engine block?

• Always observe for oil or water leaks and look for metallic elements in the oil pan after disassembly.

• Remove the pistons first before checking for leaks.

• Do not mark the position of the crankshaft supports.

• Skip the inspection of connecting rod bearings.

Multiple Choice

¿EN QUÉ SE BASA EL PRINCIPIO DE FUNCIONAMIENTO DE UN EMBRAGUE CENTRÍFUGO?

• El embrague centrífugo basa su funcionamiento en las fuerzas centrífugas que se generan por el movimiento del motor de combustión.

• La inercia centrífuga que se genera por el movimiento del motor de combustión cuando el vehículo se encuentra a ralentí no es suficiente para que los muelles del embrague se expandan y, así, los forros de fricción no llegan a contactar con el tambor.

• El embrague centrífugo basa su funcionamiento en las fuerzas centrífugas que se disipan por el movimiento del motor de combustión.

Multiple Choice

What are the main objectives achieved with a centrifugal clutch?

• Maintain idle without the combustion engine stalling even with a gear engaged. Allow for a gearbox to better adapt the vehicle to driving needs.

• Smooth engagement. Absence of noise during operation.

• More effective in situations requiring higher output torque in the traction system, such as steep slopes or starts. Generates lower losses in final performance due to internal slippage.

Multiple Choice

¿DE QUÉ TIPO PUEDEN SER LOS MANDOS DE ACCIONAMIENTO DE UNA CAJA DE CAMBIOS AUTOMÁTICA?

• Estos sistemas de cajas pueden ser hidráulicos, electrónicos o una combinación de los dos, o lo que es lo mismo, electrohidráulicos.

• Estos sistemas de transmisiones pueden ser hidráulicos, electrónicos o una combinación de los dos, o lo que es lo mismo, electrohidráulicos.

• Estos sistemas de mando pueden ser hidráulicos, electrónicos o una combinación de los dos, o lo que es lo mismo, electrohidráulicos.

Multiple Choice

What mechanical assembly is responsible for temporarily disconnecting the engine from the gearbox to enable starting and gear changes?

• los amortiguadores

• el embrague

• las ballestas

Multiple Choice

Which of the following elements make up the transmission system?

• Piñón de ataque, Satélites, Planetarios

• Pistón, Biela, Cigüeñal

• El embrague, la caja de cambio, el árbol de transmisión, el diferencial, los palieres

Multiple Choice

¿De qué dos tipos puede ser el mando de accionamiento de una caja de cambios robotizada?

• a) Dependiendo del sistema de montaje, hay que destacar dos tipos distintos de accionamiento de los mandos de una caja de cambios robotizada: -Mediante un procedimiento hidráulico, por ejemplo el sistema Selespeed de Alfa Romeo. -Mediante un procedimiento mecánico, utilizado principalmente por fabricantes japoneses y BMW con su sistema SMG2.

• b) Dependiendo del sistema de montaje, hay que destacar dos tipos distintos de accionamiento de los mandos de una caja de cambios robotizada: -Mediante un procedimiento electro, por ejemplo el sistema Selespeed de Alfa Romeo. -Mediante un procedimiento eléctricomecanico, utilizado principalmente por fabricantes japoneses y BMW con su sistema SMG2.

• c) Dependiendo del sistema de montaje, hay que destacar dos tipos distintos de accionamiento de los mandos de una caja de cambios robotizada: -Mediante un procedimiento electro-hidráulico, por ejemplo el sistema Selespeed de Alfa Romeo -Mediante un procedimiento eléctrico, utilizado principalmente por fabricantes japoneses y BMW con su sistema SMG2.

Open Ended

Explain the process for checking the misalignment of a secondary shaft and the measuring device used in the process.

Open Ended

After studying the rectification of internal combustion engines, what questions do you still have or what would you like to learn more about?

Multiple Choice

What checks are performed on the crankshaft?

• Cleaning the camshaft, cracked camshaft, camshaft with scored journals, taper and ovality on the camshaft journals

• Cleaning the crankshaft, cracked crankshaft, crankshaft with scored journals, taper and ovality on the crankshaft journals

• Cleaning the cylinder head, cracked cylinder head, cylinder head with scored journals, taper and ovality on the cylinder head journals

• Cleaning the connecting rod, cracked connecting rod, connecting rod with scored journals, taper and ovality on the connecting rod journals