While you do each step of the valve test, make sure that there is no leakage.

A.Take care to the absence of leakage during the execution of each step in the valve test.

B.Throughout the valve test, verify that there are no obvious signs of leakage at each step.

C.Make certain that no leakage is present as you proceed with each step of the valve test.

正确答案：C

The fuel flow transmitter measures the fuel mass-flow that goes to the manifolds and fuel nozzles.

If you select abort during the test, the test stops and the CDU shows the test abort page.

The turbine clearance control sensor supplies the EEC with temperature data from the high pressure turbine shroud.

The servo fuel heater attaches to the engine oil/fuel heat exchanger.

The combustor mixes air from the compressors and fuel from the fuel nozzles.

Notes call attention to methods which make the job easier, or provide supplementary or explanatory information.

Record the location and the color of the cables of each bundle which goes through the AC current transformer.

A fire can be due to excessive overheat or flammable fluid leaks and can endanger the aircraft safety.

When the preset threshold is reached, the smoke detector triggers a warning via the Cabin Intercommunication Data System.

This controller is applicable to all systems. Thus, it can also control thermal oil heaters.