Which test is described as operational prior to other tests to verify safe operation through all functional modes?

• A. Dynamic load test
• B. Modified Static test
• C. No load test
• D. Full load test

Answer: (C)

No-load testing is done first to verify safe operation across all functional modes without applying external stress. By running the equipment with no load, you can check that the basic systems—controls, interlocks, alarms, and mode transitions (start, run, stop, and any safety overrides)—respond correctly and safely. This step helps catch issues in the control logic, instrumentation, or mechanical alignment that could cause problems once load is added, reducing the risk of damage or unsafe operation in later, more demanding tests.

The other tests introduce load and dynamics: a dynamic load test examines behavior under moving forces and varying conditions; a full-load test pushes the system to its maximum operating capacity; a modified static test applies partial load. These are important, but they assume the basic, safe functioning established by the no-load check.