Using a file without a handle may result in （）

By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engine. The device most commonly used is a（）

If separating effect is not good, which measure should be taken （）

Flame failure in an automatically fired auxiliary boiler can from a/an （）

Engine parameters shall be corresponded to NOx Technical Files. This is required by （）

Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）

Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）

The condensers located in various stages of a flash evaporator are cooled by（）

If two A.C.generators are to be operated in parallel, the load is distributed evenly by（）

As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?（）