Question 1

The flywheel bolts should be loosened in a ____________________ pattern.

Accepted Answer

The answer of The flywheel bolts should be loosened in...

Question 2

Install a ____________________ before you disconnect the battery to prevent the vehicle's computer and other devices from losing information they have stored in their memory.

Accepted Answer

The answer of Install a ____________________ before you disconnect the...

Question 3

While discussing cleaning engine parts, Technician A says a parts tumbler is good for cleaning aluminum components such as intake manifolds and cylinder heads. Technician B says that the cleaning method used depends on the component to be cleaned and the type of cleaning equipment available. Who is correct?

Accepted Answer

A parts tumbler is not typically used for cleaning delicate aluminum components like intake manifolds and cylinder heads, as it can cause damage. Technician B is correct in stating that the cleaning method depends on the component and available equipment.

Question 4

Technician A washes parts to remove the ash from them after they have been cleaned in a thermal cleaning oven. Technician B uses shot blasting to remove the ash from parts after they have been cleaned in a thermal cleaning oven. Who is correct?

Accepted Answer

Both techniques, washing parts and shot blasting, are valid methods for removing ash from parts after they have been cleaned in a thermal cleaning oven.

Question 5

Technician A says that compared to RWD cars, engines in FWD cars are easier to remove because they don't have large assemblies such as engine cradles, suspension components, brake components, splash shields, or other pieces that need to be disassembled or removed. Technician B says in certain vehicles the engine and transmission must be removed together as a unit. Who is correct?

Accepted Answer

Technician B is correct because, in certain vehicles, especially those with transverse-mounted engines, the engine and transmission are often removed together as a unit. Technician A is incorrect because FWD cars often have complex assemblies that need to be removed, making engine removal potentially more challenging than in RWD cars.

Question 6

While removing a cylinder head, Technician A keeps all rocker arms and pushrods in order. Technician B loosens the head bolts in random order. Who is correct?

Accepted Answer

Technician A is correct because keeping all rocker arms and pushrods in order ensures that they can be reinstalled in their original positions, which is important for maintaining the engine's proper operation. Technician B is incorrect because loosening the head bolts in a random order can cause uneven stress and potentially warp the cylinder head.

Question 7

Which type of soil is not water soluble?

Accepted Answer

Carbon, in its pure form such as graphite or diamond, is not water soluble, unlike dirt, dust, and mud which can mix or dissolve in water to some extent.

Question 8

Technician A uses a chalk mark to index the position of the rear U-joint and pinion flange. Technician B, when removing drive axles, scribes marks on the suspension and steering parts to ensure that the wheel alignment will be close after reassembly. Who is correct?

Accepted Answer

Both technicians are using appropriate methods for their tasks. Technician A is indexing the U-joint to the pinion flange to ensure it is reassembled in the same orientation, which is important for maintaining balance and minimizing vibrations. Technician B is marking suspension and steering parts before disassembly to aid in reassembly and help ensure that wheel alignment is close to its original state, which is a common practice to avoid alignment issues post-repair.

Question 9

Technician A leaves the drive axles attached to the wheel hubs, disconnects the inboard CV joints at the axle flange, then positions the axles so that they don't interfere with engine/transaxle removal. Technician B separates the lower ball joint from the steering knuckle then removes the drive axle from the vehicle. Who is correct?

Accepted Answer

Both techniques described by Technician A and Technician B are valid methods for removing drive axles in preparation for engine or transaxle removal. Technician A's method involves disconnecting the inboard CV joints and repositioning the axles, while Technician B's method involves separating the lower ball joint to remove the drive axle entirely.

Question 10

While discussing abrasive cleaners, Technician A says shot is angular in shape and is used for aggressive cleaning. Technician B says grit is an angular-shaped medium and is used to peen metal surfaces. Who is correct?

Accepted Answer

Shot is typically round and used for peening, while grit is angular and used for aggressive cleaning.

Question 11

Technician A uses masking tape and a marking pen to label electrical connectors and vacuum lines. Technician B puts all the nuts and bolts and other fasteners into a big coffee can and sorts them out during reassembly. Who is correct?

Accepted Answer

Technician A's method of using masking tape and a marking pen to label electrical connectors and vacuum lines is a good practice for ensuring correct reassembly and avoiding confusion. Technician B's method of putting all nuts and bolts into a big coffee can without organization can lead to lost or mismatched fasteners and increased reassembly time.

Question 12

Extreme care should be used when using a scraper or wire brush on parts made of _____.

Accepted Answer

Aluminum is a softer metal and can be easily damaged or scratched by abrasive tools like scrapers or wire brushes.

Question 13

When attaching a lifting eye to an engine prior to removing the engine with an engine hoist, how far must a 10 mm bolt be threaded into the engine?

Accepted Answer

The bolt should be threaded into the engine at least 1.5 times its diameter for secure attachment, so for a 10 mm bolt, it should be threaded in at least 15 mm.

Question 14

Technician A removes the starter wiring and then removes the starter from the vehicle. Technician B unbolts the starter with the wiring attached and lets the starter hang by the wiring. Who is correct?

Accepted Answer

Technician A is correct because removing the starter wiring before removing the starter from the vehicle prevents damage to the wiring and ensures safety. Letting the starter hang by the wiring, as Technician B does, can damage the wiring and is not a recommended practice.

Question 15

Technician A says excessive buildup of sludge may indicate a poor oil change schedule. Technician B says a buildup of scale in the engine can cause cooling system blockage. Who is correct?

Accepted Answer

Technician A is correct because sludge buildup often results from infrequent oil changes or using low-quality oil, which can lead to poor engine performance and damage. Technician B is correct because scale buildup, typically from minerals in the coolant, can block the cooling system, leading to overheating and engine damage.

Question 16

Which of the following is NOT used in a dye penetrant crack detection?

Accepted Answer

Electromagnet is not used in dye penetrant crack detection. This method relies on the application of a liquid penetrant to the surface, followed by a developer to draw out the penetrant from cracks for visual inspection, not on magnetic fields.

Question 17

Caustic soda should never be used to clean parts made of _____.

Accepted Answer

Caustic soda (sodium hydroxide) is highly reactive with aluminum, causing corrosion and damage to aluminum parts. It should not be used for cleaning aluminum surfaces.

Question 18

A ____________________ hammer is used to drive the CV joint spline out of the wheel hub.

Accepted Answer

The answer of A ____________________ hammer is used to drive...

Question 19

Technician A says it is a good practice to clean the engine and engine compartment before beginning to remove the engine. Technician B says all engine fluids should be drained before engine removal. Who is correct?

Accepted Answer

Both technicians are correct. Cleaning the engine and engine compartment before removal helps prevent dirt and debris from entering the engine and other components, making the process cleaner and potentially easier. Draining all engine fluids before removal is essential to prevent spills and environmental contamination, and it is a standard safety practice.

Question 20

The first step in disassembly of an engine is usually the removal of the ____________________ and ____________________ manifolds.

Accepted Answer

The answer of The first step in disassembly of an...

Quiz 10: Engine Disassembly and Cleaning