Set 2 - MEK Motor E pariksha online questions for MEO class 4 marine enginering

1. Which of the following is the primary advantage of supercharging the air quantity in a diesel engine, by means of a turbocharger?
choose one It leads to considerable gain in thermal efficiency. It increases the maximum pressure generated in a cylinder appreciably. It improves the power to weight ratio of the engine All of the above.

2. The amount of chloride content in the water of an auxiliary boiler can be reduced by
choose one adding hydrazine blowing down the boiler adding phenolphthalein adding a sulfite chloride scavenger

3. One of the major disadvantages of constant pressure turbocharging over pulse pressure turbocharging is
choose one Reduction in specific fuel consumption Lengthening of effective stroke leading to greater expansion in engine Poor turbocharging efficiency Inability of the system to operate at low loads and slow response during acceleration

4. Which of the following design features will reduce the possibility of overheating the top compression rings of a cast iron piston?
choose one A nickel-bearing insert is cast into the top ring groove A heat dam design is sometimes used in the piston head- The top ring is located as close to the piston rim as possible The inside surface of the piston head is rounded into the ring bell

5. In a direct connected or geared main propulsion diesel engine would be fitted with a:
choose one Isochronous hunting governor Rotating governor disc Variable speed governor Constant frequency governor

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