Iowa CDL General knowledge and cargo Test 2

A load places too little weight on the truck’s steering axle. What operating problem can result?

Correct answer: The front tires may have too little traction for safe steering.

An underloaded front axle can make steering unsafe. Balance cargo so neither total weight nor individual axle loading creates a control problem.

Source: Iowa DOT official older National CDL Manual, Hy-Brid Version October 2023, July 2017 technical core; 3.2.4 Balance the Weight; printed page 3-2, physical PDF page 68. Older technical guide only: current media326 edition equivalence and current Iowa licensing requirements are not established by this source. ↗

You cannot open a sealed freight container at pickup. Does its seal make gross-weight and axle-weight checks unnecessary?

Correct answer: No; the loaded gross and axle weights still need checking.

A container seal does not measure the load or establish suitable weight distribution. The guide retains gross-weight and axle-weight checks for sealed loads. This question supplies no current numerical Iowa weight limit or permit exception.

Source: Iowa DOT official older National CDL Manual, Hy-Brid Version October 2023, July 2017 technical core; 3.3.5 Sealed and Containerized Loads; printed page 3-3, physical PDF page 69. Older technical guide only: current media326 edition equivalence and current Iowa licensing requirements are not established by this source. ↗

A heavy crate can slide sideways even though it cannot move toward the cab. Is the securement problem solved?

Correct answer: No; the load must also be protected against other movement during transport.

Blocking and bracing keep cargo from shifting in directions that can damage the vehicle or affect control. Preventing movement in one direction alone may be inadequate.

Source: Iowa DOT official older National CDL Manual, Hy-Brid Version October 2023, July 2017 technical core; 3.3.1 Blocking and Bracing; printed page 3-2, physical PDF page 68. Older technical guide only: current media326 edition equivalence and current Iowa licensing requirements are not established by this source. ↗

A flatbed has a front-end header board behind the cab. Which cargo movement is it intended to help resist?

Correct answer: Cargo moving forward during a sudden stop or crash.

A header board helps protect the cab from freight shifting forward. It does not eliminate the need for proper securement of the whole load.

Source: Iowa DOT official older National CDL Manual, Hy-Brid Version October 2023, July 2017 technical core; 3.3.3 Header Boards; printed page 3-3, physical PDF page 69. Older technical guide only: current media326 edition equivalence and current Iowa licensing requirements are not established by this source. ↗