Double-clutching is
- like using an automatic transmission.
- like shifting gears in a small car.
- a way to match engine shaft speed to the speed of the gear. ✓
- all of the above.
Answer: C. a way to match engine shaft speed to the speed of the gear.
Double-clutching is a way to match engine shaft speed to the speed of the gear.
Why this is the answer
The handbook says double-clutching means pressing the clutch pedal twice while moving from one gear to another. In its steps, you shift to neutral, release the clutch, then adjust engine speed: let the engine and gears slow for a higher gear, or add accelerator for a lower gear, before pressing the clutch and engaging the gear. That is how the engine speed is brought to what the next gear needs.
Why the other answers are wrong
- A. like using an automatic transmission. — It is not like an automatic transmission, because the passages describe a manual shifting method that uses the clutch pedal twice.
- B. like shifting gears in a small car. — It is not simply like shifting in a small car, since the passages say many heavy vehicles lack synchromesh gears and need double-clutching.
- D. all of the above. — All of the above cannot be right because the automatic and small-car comparisons are not supported.
Remember it
Think two clutch presses: neutral first, set the engine speed, then engage the next gear.