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15 Questions

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Diesel Engine Operation Notes

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Questions and Answers

What is the purpose of the air-starting valves fitted in the cylinder heads?

To inject fuel into the cylinders

To regulate the flow of lubricating oil to the moving parts

To direct high-pressure air to each cylinder during its power stroke (correct)

To monitor temperatures and pressures of the lubricating oil

What should be done before starting up to ensure prompt delivery of lubricating oil to all the moving parts?

Operate the hand-operated lubricating pumps

Check the level of oil in the main reservoir

Fill all lubricators and open the feeds (correct)

Prime the fuel injection pump to deliver fuel oil to the cylinders

What happens after the engine turns on compressed air?

The hand-operated lubricating pumps are activated

The fuel injection pump is shut off

The engine operates by burning fuel in all cylinders (correct)

The engine is shut down

What can cause pistons, cylinder walls, fuel injectors, and exhaust valves to become coated with deposits?

Leaking nozzle or pump check valves Signup and view all the answers

What may result from improper fuel oil selection?

Incomplete combustion of the fuel Signup and view all the answers

What is the main issue with using an open cooling system for a diesel engine?

The build-up of environmental contaminants in the cooling water Signup and view all the answers

In a closed cooling system for a diesel engine, what keeps the engine coolant pure?

Recirculation through a water or air cooled heat exchanger Signup and view all the answers

What is the purpose of the shell and tube heat exchanger in a diesel engine closed cooling system?

To cool the lube oil Signup and view all the answers

What problem can occur if coolant temperatures in a diesel engine exceed the manufacturer’s recommendation?

Combustion gases leaking into the crankcase Signup and view all the answers

What additional function does a diesel standby generator perform?

Providing low-pressure hot water or steam from exhaust gases Signup and view all the answers

How are the majority of stationary industrial type diesel engines started?

Using compressed air Signup and view all the answers

What is the purpose of turning the engine crankshaft during starting?

To ignite the fuel when injected into the cylinder Signup and view all the answers

What is the typical air pressure for the starting motor of a diesel engine?

1400 kPa Signup and view all the answers

What is done to emergency generators powered by diesel engines to ensure quick and reliable starting?

Continuous circulation of warm oil Signup and view all the answers

What operates the air-distributing device in some diesel engines?

Camshaft Signup and view all the answers