Which of these is a key check when you inspect a double or triple rig?
Correct answer: Confirm that each dolly's pintle eye is locked securely in the trailer's pintle hook.
Answer options
- AConfirm that each dolly's pintle eye is locked securely in the trailer's pintle hook. Correct
- BConfirm that the drain valve on the converter dolly's air tank is left open.
- CConfirm that the shut-off valves at the back of the last trailer are open.
Why
A pintle hook connects each converter dolly to the trailer in front of it, so the eye has to sit fully in the hook and the hook must be latched; otherwise a trailer may come loose on the road. Both the shut-off valves on the rear of the last trailer and the drain valve on the dolly's air tank should be shut, not open.
About this question
Topic: Doubles and triples License: CDL
Part of these practice sets:
Where it applies: Asked in every state.
Practice the whole set
This question is part of Inspecting Doubles and Triples (15 questions). Take the full set and check your score.
Practice Inspecting Doubles and TriplesMore questions from Inspecting Doubles and Triples
- In a double or triple combination, how should you set the shut-off valves located at the back of the rearmost trailer?
- You are inspecting a converter dolly. What must be true of its pintle hook connection?
- Which lamp is required on a converter dolly that has an antilock braking system (ABS)?
- On a walk-around inspection, what should be true of every landing gear?
- What tells you that a converter dolly is fitted with antilock brakes (ABS)?
- How do you confirm that air is reaching every trailer in a double or triple combination?
- How can you check that air is actually getting all the way to the second trailer?
- To test the trailer brakes, you apply the hand valve and open the valve on the service line at the very rear of the combination. What sound should you hear?
Practice on your phone.
Practice here in your browser, or use the app with the same questions and explanations. It's free on the App Store.