If engine rpm does not stabilize and continues to rise or the temperature rises above the maximum levels, what test should be stopped immediately?

If engine rpm does not stabilize and continues to rise or the temperature rises above the maximum levels, what test should be stopped immediately?

• A. Stall test
• B. Road test
• C. Pressure test
• D. Lock-up converter test

Answer: (A)

In a stall test, the engine is deliberately loaded while the vehicle is held stationary to bring the system toward a stall. The expected outcome is that engine RPM will reach a stable level as the load is balanced and the test can continue to observe how the drivetrain behaves. If the engine RPM does not stabilize and keeps climbing, or if the temperature rises beyond safe limits, you must stop immediately. This is because continuing under those conditions can cause excessive engine speed, overheating, and potential damage to components such as the engine, cooling system, or torque-converter area. The symptom described is a clear sign that the test is no longer safe or valid, so halting the test prevents damage and protects the equipment.

In a stall test, the engine is deliberately loaded while the vehicle is held stationary to bring the system toward a stall. The expected outcome is that engine RPM will reach a stable level as the load is balanced and the test can continue to observe how the drivetrain behaves. If the engine RPM does not stabilize and keeps climbing, or if the temperature rises beyond safe limits, you must stop immediately. This is because continuing under those conditions can cause excessive engine speed, overheating, and potential damage to components such as the engine, cooling system, or torque-converter area. The symptom described is a clear sign that the test is no longer safe or valid, so halting the test prevents damage and protects the equipment.