meta-pixelWhat do retarders do?
favicon
CDL Prep: Exams & Study Guides
Ace your CDL Exam in one take.
Join 50,000+ users around America to get your Commercial Driver License today!
apple-storegoogle-play
qrcode
Question:

What do retarders do?

1. Reduce brake wear and tear

2. Apply braking power to the drive wheels

3. May cause your vehicle to skid more easily

4. All of the above

Answer: All of the above

Explanation
Retarders, of which there are many types, apply braking power directly onto the driving wheels, which reduces brake wear and tear, and means you will not have to use your brakes as often. Retarders, however, may also make you more likely to skid when you have poor wheel traction, so turn them off in bad weather.
This question is in Section 1: General Knowledge of our CDL Test Guide. Explore now!
Related Question

Question: Your spare tire must be…?

1. The same size as your other tires

2. The same pressure as your other tires

3. In as good condition as your other tires

4. All of the above

All of the above

It’s easy to neglect checking on the spare tire. If you’re stuck out on the road with a puncture, it’s essential that it is of the same size, pressure, and quality as the tire it replaces.

Question: Which of these is the proper signal to change lane?

1. Signal before the change and move over quickly.

2. Signal after you begin change and cross over slowly.

3. Signal early and change lane slowly and smoothly.

Signal early and change lane slowly and smoothly.

Question: You are going to be hauling hazardous materials over a route you do not know well. When should you check the route and the permits needed for the trip?

Before starting the trip.

Question: A vehicle contains 500 pounds each of explosives class 1.1 and 1.2. You must use:

Explosives 1.1 placards.

Question: The amount of liquid to load into a tank depends on what?

1. The amount the liquid will expand in transit.

2. The legal weight limits.

3. Both of the above.

Both of the above.

CDL Prep: Exams & Study Guides Blog

How to Handle Difficult Customers as Delivery Truck Drivers
How to Handle Difficult Customers as Delivery Truck Drivers
Handling difficult customers is necessary to succeed in this line of work. This article will discuss some tips and strategies for handling difficult customers as delivery truck drivers.
a year ago
Team Driving vs. Solo Driving What is Better
Team Driving vs. Solo Driving What is Better
Long-distance driving has two options: team driving for faster delivery but requiring teamwork, and solo driving for independence but requiring sole responsibility for the trip.
a year ago
The Best Trucker Apps to Help You on Roadway - CDL Prep
The Best Trucker Apps to Help You on Roadway - CDL Prep
The best trucker GPS app is helpful since driving a truck can be challenging and demanding, especially when navigating unfamiliar routes and finding the best truck-friendly roads.
a year ago
See MoreSee More