Set - 7 MEK Motor online multiple choice questions with answer

1. In modern 2-stroke marine diesel engines the exhaust valves are:
choose one Mechanically actuated Pneumatically actuated Hydraulically actuated Electrically actuated

2. Which of the following is a proper practice to follow in the event of discovery of a small soot fire in exhaust gas boilers?
choose one Repeated soot blowing Stopping cooling water circulation Reducing main engine speed Opening the inspection doors and extinguishing the fire

3. The boiler water alkalinity in a coil-type auxiliary boiler should be maintained at the pH recommended by the boiler manufacturer to
choose one precipitate silica from solution reduce corrosion in the heating coil prevent clogging and erosion in the coil maintain zero water hardness

4. What does the NLGI number of a grease indicate?
choose one The oxidation resistance of the grease The consistency of the grease i.e how fluid or non fluid Demulsibility of the grease The shelf life of the grease

5. Which of the bearings listed is most widely used for main and connecting rod bearings of modern diesel engines?
choose one Steel-lined Poured babbitt, self-aligning Split roller Precision insert

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