Basic Control, Shifting & Backing

5 free sample questions of the 35 in this topic. The full set is in the app.

1. Question 1

   To keep a manual-transmission truck from rolling back when starting on a grade, you should:

   • A.Partly engage the clutch before taking your right foot off the brake
   • B.Rev the engine to maximum rpm first
   • C.Start in the highest gear
   • D.Turn the wheels toward the curb
   Show answer & explanation

   Answer: A. Partly engage the clutch before taking your right foot off the brake

   Partly engage the clutch before releasing the brake, use the parking brake when needed, and release it only with enough engine power applied — rolling back can hit someone behind you.

   Source: California Commercial Driver Handbook (DL 650) — §2.2.1 — Accelerating

2. Question 2

   On a tractor-trailer, which control can hold the rig from rolling back during a start?

   • A.The trailer brake hand valve
   • B.The engine retarder
   • C.The inter-axle differential lock
   • D.The dimmer switch
   Show answer & explanation

   Answer: A. The trailer brake hand valve

   Rigs with a trailer brake hand valve can apply it to hold against rollback while engaging the clutch.

   Source: California Commercial Driver Handbook (DL 650) — §2.2.1 — Accelerating

3. Question 3

   Rough, jerky acceleration is a problem because it can:

   • A.Cause mechanical damage — and damage the coupling when pulling a trailer
   • B.Improve fuel economy too much
   • C.Overcharge the batteries
   • D.Wear out the mirrors
   Show answer & explanation

   Answer: A. Cause mechanical damage — and damage the coupling when pulling a trailer

   Speed up smoothly and gradually: rough acceleration causes mechanical damage, and with a trailer it stresses the coupling.

   Source: California Commercial Driver Handbook (DL 650) — §2.2.1 — Accelerating

4. Question 4

   The correct way to hold the steering wheel is:

   • A.Firmly, with both hands on opposite sides of the wheel
   • B.Loosely, with one hand at the top
   • C.With both hands together at the bottom
   • D.Palms only, thumbs outside the rim
   Show answer & explanation

   Answer: A. Firmly, with both hands on opposite sides of the wheel

   Hold the wheel firmly with both hands on opposite sides — hitting a curb or pothole can yank the wheel out of a loose grip.

   Source: California Commercial Driver Handbook (DL 650) — §2.2.2 — Steering

5. Question 5

   For a smooth, safe stop in a manual-transmission vehicle:

   • A.Push the brake pedal down gradually and clutch in when the engine is close to idle
   • B.Push the clutch in first, then brake hard
   • C.Downshift through every gear to a stop
   • D.Use the parking brake to slow down
   Show answer & explanation

   Answer: A. Push the brake pedal down gradually and clutch in when the engine is close to idle

   Brake pressure is applied gradually and controlled for a smooth stop; the clutch goes in only when the engine is near idle.

   Source: California Commercial Driver Handbook (DL 650) — §2.2.3 — Stopping

30 more Basic Control, Shifting & Backing questions are in the app, along with explanations and flashcards for every one.

OnRoute is an independent study aid based on the federal CDL standards (49 CFR Part 383), the FMCSA Entry-Level Driver Training theory curriculum (49 CFR Part 380 Appendix A), and related Federal Motor Carrier Safety Regulations. It is not affiliated with, endorsed by, or sponsored by the FMCSA, AAMVA, or any state driver licensing agency. CDL knowledge tests are administered by your state, and state-specific requirements may vary — always consult your state's CDL manual.