Question 1

A cylinder bore can be checked for out-of-roundness with a _____.
A)dial bore gauge
B)telescoping gauge and micrometer
C)both A and B
D)neither A nor B

Accepted Answer

Both a dial bore gauge and a telescoping gauge with a micrometer can be used to check a cylinder bore for out-of-roundness. Each tool provides a method to measure the internal dimensions of the cylinder, allowing for the detection of any deviation from a perfect circle.

Question 2

Technician A says that the oil pump is driven directly by the crankshaft. Technician B says on some older engines the oil pump is driven by the distributor. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Accepted Answer

Both statements are correct. The oil pump can be driven directly by the crankshaft in many engine designs. In some older engines, the oil pump is indeed driven by the distributor, which in turn is driven by the camshaft or directly by the engine's gear train.

Question 3

Technician A says piston ring grooves should be cleaned with a groove cleaner. Technician B says piston ring grooves should be cleaned with a broken piston ring. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Accepted Answer

The answer of Technician A says piston ring grooves should...

Question 4

Two technicians are discussing the installation of segmented [three piece] oil control rings. Technician A says the ends of the expander/spacer [middle piece] must overlap. Technician B says that the end gaps of all three pieces must be evenly spaced apart. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Accepted Answer

Technician B is correct because the end gaps of all three pieces of a segmented oil control ring should be evenly spaced apart to ensure proper sealing and function. Technician A is incorrect because the expander/spacer should not overlap; it should be butted end-to-end.

Question 5

A full floating piston pin _____.
A)rotates in the piston
B)rotates in the connecting rod
C)both A and B
D)neither A nor B

Accepted Answer

A full floating piston pin is designed to rotate both in the piston and in the connecting rod, allowing for better distribution of wear and stress.

Question 6

A degree wheel is used to _____.
A)adjust camshaft timing on a performance camshaft
B)resurface the cylinder deck surface
C)align the crankshaft to the cylinder bores
D)install the oil pump

Accepted Answer

A degree wheel is primarily used to adjust camshaft timing on a performance camshaft, allowing for precise control over the valve opening and closing events relative to the crankshaft position.

Question 7

Technician A says engine blocks are made from iron. Technician B says engine blocks are made from aluminum. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Accepted Answer

Engine blocks can be made from both iron and aluminum, depending on the specific requirements of the engine, such as weight, cost, and thermal characteristics.

Question 8

Technician A says a piston pin is sometimes called a wrist pin. Technician B says the piston pin is always centered in the piston. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Accepted Answer

The piston pin is indeed commonly referred to as a wrist pin, which is why Technician A is correct. However, Technician B's statement that the piston pin is always centered in the piston is not accurate, as the positioning can vary depending on the engine design and the desired piston motion characteristics.

Question 9

Technician A installs a cup-type core plug with its flanged edge inward. Technician B hits the center [crown] of a dished-type core plug with a hammer to flatten and expand the plug for a tight fit. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Accepted Answer

Technician B is correct because hitting the center of a dished-type core plug with a hammer flattens and expands it, ensuring a tight fit. Technician A is incorrect because a cup-type core plug should be installed with the flanged edge outward, not inward.

Question 10

All of the following are correct statements about lifters EXCEPT:
A)Flat bottom (nonroller)lifters rotate in their bores
B)Roller lifters do not and should not rotate in their bores
C)The lobes on a camshaft designed for roller lifters may have a steeper ramp and a blunt nose
D)All engines equipped with roller lifters require periodic valve (lash)adjustment

Accepted Answer

Roller lifters are often used in engines designed to minimize maintenance, including the need for periodic valve adjustments. Many engines with roller lifters are designed with hydraulic lifters that automatically adjust valve lash, eliminating the need for manual adjustments.

Question 11

Two technicians are discussing undersized bearings. Technician A says a 0.001 in. or 0.002 in. bearing can be used on a stock crankshaft journal if the oil clearance [difference between the bearing diameter and the journal diameter] is slightly excessive and the journal is not excessively tapered or out of round. Technician B says 0.010 in., 0.020 in., and 0.030 in. undersized bearings are only used when the crankshaft journals have been reground. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Accepted Answer

Technician A is correct because using slightly undersized bearings can compensate for excessive oil clearance without the need for crankshaft regrinding, provided the journal's condition is within acceptable limits. Technician B is also correct because bearings that are 0.010 in., 0.020 in., and 0.030 in. undersized are typically used when the crankshaft journals have been reground to restore proper clearances and journal surface conditions.

Question 12

Technician A checks crankshaft endplay or end clearance with a feeler gauge. Technician B uses a dial indicator. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Accepted Answer

Both Technician A and Technician B are correct. Crankshaft endplay can be measured using a feeler gauge or a dial indicator.

Question 13

Technician A says that the pickup screen is rarely replaced when an engine is rebuilt. Technician B s says that when installing the pickup Tube, you should reuse the original gaskets and seals.. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Accepted Answer

Technician A is incorrect because the pickup screen is often replaced during an engine rebuild to ensure there is no debris or damage that could affect oil circulation. Technician B is incorrect because when installing the pickup tube, new gaskets and seals should be used to ensure a proper seal and prevent leaks. Reusing old gaskets and seals can lead to engine oil leaks and other issues.

Question 14

What tool is required to remove a dished-type core plug?
A)vise grips
B)Allen socket
C)three-jaw puller
D)slide hammer

Accepted Answer

A slide hammer is the correct tool for removing a dished-type core plug, as it allows for the plug to be pulled out without causing damage to the surrounding area.

Question 15

Which operation must be performed before removing the pistons from an engine?
A)Install rod bolt protector sleeves
B)Remove the cylinder ridge with a ridge reamer
C)If the connecting rods are not marked from the factory, number the rods with a prick punch or number stamp
D)All of these steps must be taken.

Accepted Answer

All of these steps are necessary before removing pistons from an engine. Installing rod bolt protector sleeves prevents damage to the crankshaft journals. Removing the cylinder ridge with a ridge reamer prevents the ridge from damaging the pistons as they are removed. Numbering the rods ensures they are reinstalled in the correct order, maintaining the engine's balance and performance.

Question 16

Technician A uses a micrometer to measure the connecting rod journal for taper. Technician B uses a micrometer to measure the connecting rod journal for out-of-roundness. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Accepted Answer

Both Technician A and Technician B are correct. A micrometer can be used to measure the connecting rod journal for both taper and out-of-roundness by taking measurements at different points and comparing them.

Question 17

Pistons for modern engines are made of _____.
A)cast iron
B)aluminum
C)titanium
D)steel

Accepted Answer

Pistons for modern engines are primarily made of aluminum because it is lightweight and has good thermal conductivity, which helps in efficiently managing the engine's heat.

Question 18

Technician A says the maximum amount of cylinder out-of-roundness allowed in most cases is 0.0015 in. (.038 mm). Technician B says that a cylinder can have a taper of up to 0.010 in. (.254 mm)and be acceptable. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Accepted Answer

Technician A is correct because the maximum allowable cylinder out-of-roundness for most engines is indeed around 0.0015 inches (0.038 mm). Technician B's statement is incorrect because a cylinder taper of up to 0.010 inches (0.254 mm) is generally considered excessive and would likely require machining or replacement of the cylinder.

Question 19

When installing an oil pump in an engine: Technician A packs the pump with petroleum jelly. Technician B submerges the pump in clean oil and rotates the pump shaft to fill the pump body. Who is correct?
A)A only
B)B only
C)Both A and B
D)Neither A nor B

Accepted Answer

Submerging the pump in clean oil and rotating the pump shaft to fill the pump body is the correct method for priming an oil pump.

Question 20

Which of the following is NOT a type of camshaft drive mechanism?
A)shaft
B)gear
C)chain
D)belt

Accepted Answer

A "shaft" is not a type of camshaft drive mechanism. Camshaft drive mechanisms typically include gear, chain, and belt systems to transfer rotational motion from the crankshaft to the camshaft.

Quiz 11: Lower-End Theory and Service

A cylinder bore can be checked for out-of-roundness with a _____.

Technician A says that the oil pump is driven directly by the crankshaft. Technician B says on some older engines the oil pump is driven by the distributor. Who is correct?

Technician A says piston ring grooves should be cleaned with a groove cleaner. Technician B says piston ring grooves should be cleaned with a broken piston ring. Who is correct?

Two technicians are discussing the installation of segmented [three piece] oil control rings. Technician A says the ends of the expander/spacer [middle piece] must overlap. Technician B says that the end gaps of all three pieces must be evenly spaced apart. Who is correct?

A full floating piston pin _____.

A degree wheel is used to _____.

Technician A says engine blocks are made from iron. Technician B says engine blocks are made from aluminum. Who is correct?

Technician A says a piston pin is sometimes called a wrist pin. Technician B says the piston pin is always centered in the piston. Who is correct?

Technician A installs a cup-type core plug with its flanged edge inward. Technician B hits the center [crown] of a dished-type core plug with a hammer to flatten and expand the plug for a tight fit. Who is correct?

All of the following are correct statements about lifters EXCEPT:

Technician A checks crankshaft endplay or end clearance with a feeler gauge. Technician B uses a dial indicator. Who is correct?

Technician A says that the pickup screen is rarely replaced when an engine is rebuilt. Technician B s says that when installing the pickup Tube, you should reuse the original gaskets and seals.. Who is correct?

What tool is required to remove a dished-type core plug?

Which operation must be performed before removing the pistons from an engine?

Technician A uses a micrometer to measure the connecting rod journal for taper. Technician B uses a micrometer to measure the connecting rod journal for out-of-roundness. Who is correct?

Pistons for modern engines are made of _____.

Technician A says the maximum amount of cylinder out-of-roundness allowed in most cases is 0.0015 in. (.038 mm) . Technician B says that a cylinder can have a taper of up to 0.010 in. (.254 mm) and be acceptable. Who is correct?

When installing an oil pump in an engine: Technician A packs the pump with petroleum jelly. Technician B submerges the pump in clean oil and rotates the pump shaft to fill the pump body. Who is correct?

Which of the following is NOT a type of camshaft drive mechanism?