Truck Dispatcher TruckDisp Equipment Specifications 4 — Questions and Answers
Question 1: What is the standard maximum legal width for commercial trucks on US highways without a permit?
- 96 inches (8 feet)
- 102 inches (8.5 feet) (Correct answer)
- 108 inches (9 feet)
- 120 inches (10 feet)
Correct answer: 102 inches (8.5 feet)
Federal regulations allow a maximum width of 102 inches (8.5 feet) for commercial vehicles on Interstate highways.
Question 2: A 'conestoga' trailer is best described as:
- A flatbed with a retractable tarp system that slides over the cargo (Correct answer)
- A refrigerated trailer with extra insulation
- A double-drop trailer for heavy equipment
- A curtainside trailer with rigid walls
Correct answer: A flatbed with a retractable tarp system that slides over the cargo
A Conestoga trailer has a rolling tarp system on a flatbed frame that provides protection while allowing side and end loading.
Question 3: What is the function of 'air ride suspension' on a trailer?
- It powers the brakes using compressed air
- It uses air bags to cushion the ride and protect fragile cargo (Correct answer)
- It inflates tires automatically while driving
- It controls the fifth-wheel height
Correct answer: It uses air bags to cushion the ride and protect fragile cargo
Air ride suspension uses pressurized air bags instead of steel springs, reducing vibration and better protecting sensitive cargo.
Question 4: How many standard pallets (48x40 inches) can a 53-foot dry van trailer typically hold?
- 20 pallets
- 26 pallets (Correct answer)
- 30 pallets
- 36 pallets
Correct answer: 26 pallets
A 53-foot trailer can typically hold 26 standard pallets in a single row configuration.
Question 5: What is a 'bobtail' truck?
- A semi-truck tractor operating without a trailer attached (Correct answer)
- A shorter version of a standard 53-foot trailer
- A truck with a fixed bed and no fifth wheel
- A tanker with a shortened tank design
Correct answer: A semi-truck tractor operating without a trailer attached
A bobtail is a semi-truck tractor driven without a trailer, which affects braking and handling performance.
Question 6: What does 'kingpin' refer to in a semi-trailer's coupling system?
- The bolt holding the trailer's rear axle in place
- The steel pin on the trailer that locks into the tractor's fifth wheel (Correct answer)
- The brake adjuster on the trailer axle
- The locking handle on the trailer door
Correct answer: The steel pin on the trailer that locks into the tractor's fifth wheel
The kingpin is a solid steel pin protruding from the trailer's front underside that slides into and locks with the fifth wheel.
Question 7: A 'curtainside' trailer differs from a standard dry van primarily because:
- It has no floor and loads through the top only
- Its walls are retractable fabric curtains allowing forklift loading from the side (Correct answer)
- It is open on top for crane loading
- It uses a pressurized compartment for hazmat loads
Correct answer: Its walls are retractable fabric curtains allowing forklift loading from the side
Curtainside trailers have retractable fabric walls that can be pulled back for side-forklift loading, improving efficiency at warehouses.
Truck Dispatcher TruckDisp Equipment Specifications 4
What is the standard maximum legal width for commercial trucks on US highways without a permit?