Question 1

When a vehicle is operated in high gear, the engine's crankshaft turns approximately three times to one turn of the transmission output shaft.

Accepted Answer

When a vehicle is operated in high gear (also known as a direct drive or overdrive in some cases), the engine's crankshaft and the transmission output shaft turn at nearly the same rate, or the output shaft may turn faster than the crankshaft in overdrive, not three times slower.

Question 2

The effective diameter of the meshed gear (used for determining its circumference) is called the ____.

Accepted Answer

The pitch diameter is the diameter of the imaginary reference cylinder upon which a gear tooth is designed. It is used to calculate gear ratios and for determining the circumference of the gear. The pitch radius is half the pitch diameter and not used for determining circumference. Helical gear refers to a specific type of gear design and synchronizer refers to a mechanism used in manual transmissions.

Question 3

An automatic transmission is used with a clutch.

Accepted Answer

An automatic transmission does not use a clutch. The clutch is only used in manual or standard transmissions.

Question 4

A(n) ____________________ allows the driver to adjust torque to fit an engine's operating requirements.

Accepted Answer

The answer of A(n) ____________________ allows the driver to adjust...

Question 5

Some trucks have a four-speed transmission with a very low first gear, sometimes called a(n) ____________________.

Accepted Answer

The answer of Some trucks have a four-speed transmission with...

Question 6

The ____________________ is the distance from the center of a gear to its outside edge.

Accepted Answer

The answer of The ____________________ is the distance from the...

Question 7

While having a discussion, Technician A says that twenty pounds of force applied to the end of a 1-foot rod produces 10 foot-pounds of torque. Technician B says that it produces 200 foot-pounds of torque. Who is correct?

Accepted Answer

Torque is calculated by multiplying the force applied by the distance from the pivot point. In this case, 20 pounds of force applied to the end of a 1-foot rod would produce 20 foot-pounds of torque (20 lbs * 1 ft), not 10 or 200 foot-pounds.

Question 8

All of the followings statements are true EXCEPT:

Accepted Answer

Power flows from the engine through the clutch disc to the input shaft, not from the input shaft to the clutch disc as stated in option D.

Question 9

Which of the following statements is LEAST-Likely true?

Accepted Answer

The input shaft is usually a single part, but it is not made up of a series of gears that mesh with the various gears on the mainshaft. This statement is not likely to be true as it is incorrect.

Question 10

Which of the following is LEAST-Likely a component of a typical internal shift mechanism?

Accepted Answer

A cylinder is not typically a component of an internal shift mechanism. Springs, notches, and ball sockets are commonly used components in such systems.

Question 11

Most automatic transmissions achieve ____ with planetary gears and a lock-up torque converter.

Accepted Answer

Overdrive is achieved by using planetary gears and a lock-up torque converter, allowing the engine to run at a lower RPM while maintaining the same vehicle speed. This can provide better fuel efficiency and less wear on the engine.

Question 12

While having a discussion, Technician A says that the synchro allows two gears spinning at different speeds to mesh without clashing. Technician B says that it blocks the shift and equalizes the speed between two moving gears using cone clutch action. Who is correct?

Accepted Answer

Both Technician A and Technician B are correct. Technician A is correct in stating that a synchro allows two gears spinning at different speeds to mesh without clashing, which is a fundamental function of a synchronizer in a manual transmission. Technician B is also correct in explaining that the synchro blocks the shift and equalizes the speed between two moving gears using a cone clutch action, which is how the synchronizer achieves smooth gear meshing.

Question 13

A(n) ____________________ can be calculated by dividing the number of teeth on the driven gear by the number of teeth on the driving gear.

Accepted Answer

The answer of A(n) ____________________ can be calculated by dividing...

Question 14

When the driving gear is smaller than the driven gear, this decreases output speed and increases output torque.

Accepted Answer

This is known as a gear reduction and is a common method of increasing torque in a mechanical system. The smaller driving gear rotates more quickly than the larger driven gear, but the output speed is slower and the output torque is higher.

Question 15

The synchronizer, or synchro, allows two gears spinning at different speeds to mesh without clashing.

Accepted Answer

This is correct, a synchro works to align the speeds of two gears before they mesh together to prevent damage or wear on the gears.

Question 16

All of the following statements are true EXCEPT:

Accepted Answer

An interlock mechanism prevents the transmission from being shifted into reverse or park without pressing the brake pedal, but it does not hold the transmission in gear.

Question 17

The term MOST-likely used to describe the clearance between meshing gear teeth is:

Accepted Answer

Backlash describes the clearance between meshing gear teeth.

Question 18

The ____________________ is the ratio between the transmission output shaft and the differential ring gear.

Accepted Answer

The answer of The ____________________ is the ratio between the...

Question 19

A four-stroke engine produces equal torque at all times.

Accepted Answer

A four-stroke engine produces torque at different levels depending on the RPM (revolutions per minute) of the engine. The torque increases as RPM increases until it reaches a peak, after which it begins to decrease. This is known as the engine's torque curve.

Question 20

The term MOST-Likely used to describe simple gears with straight-cut teeth is:

Accepted Answer

Spur gears are simple gears with straight-cut teeth. Idler gears are not necessarily simple gears and lower/higher gears refer to gear ratios, not the type of teeth.

Quiz 71: Manual Transmission Fundamentals