A chassis dynamometer is designed to simulate driving by placing the vehicle on rollers.

• A. Sometimes
• B. True
• C. False
• D. Not applicable

Answer: (B)

The main idea here is that a chassis dynamometer recreates driving conditions by letting the vehicle roll on rollers while the drivetrain is loaded to mimic road resistance. With the wheels turning on the rollers and controlled braking or loading applied, you simulate real-world driving forces such as acceleration, drag, and rolling resistance. This setup lets you measure horsepower at the wheels and observe performance without a road test, which is exactly what the statement describes. So, it’s true that a chassis dynamometer is designed to simulate driving by placing the vehicle on rollers. Saying it’s only sometimes used, not used at all, or not applicable doesn’t fit how these devices are purposefully built and used in testing.