（） is not installed on the main switchboar.

The cetane rating of diesel fuel is an indication of the （）

Using a file without a handle may result in （）

A purge recovery system is used in a centrifugal air conditioning or refrigeration system to （）

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（）

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

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

Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）

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

The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on the（）