Category: EK Motor

—

by

(a) Describe, with the aid of a sketch, the lubrication system for a crosshead engine, explaining the properties required for the lubricating oil in each system (10) (b) Describe a system which may be used to ensure that the cylinder lubricating oil properties are available for a crosshead engine when changing between fuels (including between…

EK Motor Mar 2021 (Q4)

—

by

With reference to diesel engine SOx exhaust gas cleaning and pollution control: (a) State, with reasons, which system parameters are monitored, explaining where the monitoring devices are located, how the data is stored and how data is made available to regulatory authorities (10) (b) State how pollution of sea water can be caused by the…

EK Motor Mar 2021 (Q3)

—

by

With reference to turbocharger systems: (a) Describe how performance of the system is monitored and how the information gathered is used to assess performance (8) (b) Describe the arrangements for maintaining the system in good condition (8) Scavenging & Turbocharger Mar 2021 (Q3)

EK Motor Mar 2021 (Q2)

—

by

(a) With the aid of sketches, describe the operation of a dual fuel 4-stroke engine when operating on gas (10) (b) For the engine described in part (a), explain how and when the fuels are supplied to the cylinders (6) Dual fuel Mar 2021 (Q2)

EK Motor Mar 2021 (Q1)

—

by

With reference to diesel engine crankshafts: (a) Explain the cause and effect of torsional vibration (4) (b) Explain the term critical speed, stating why the engine should not be continuously operated at this speed (6) (c) Explain the term fatigue cracking, stating with reasons, TWO factors which have an influence on the likelihood of fatigue…

EK Motor Dec 2020 (Q9)

—

by

(a) Describe how crosshead bearing and guide clearances can be checked (6) (b) Describe, with the aid of a sketch, the procedure for checking the condition of a crosshead engine bottom end bearing surface (10). Bearings Dec 2020 (Q9)

EK Motor Dec 2020 (Q8)

—

by

With reference to fatigue of engineering components: (a) Draw an S/N curve for steel, showing the Fatigue Limit and two representative stress-cycle conditions on the graph (4) (b) Explain how a component is designed to avoid fatigue failure, using the S/N curve drawn in part (a) (4) (c) Explain how poor maintenance and incorrect machinery…

EK Motor Dec 2020 (Q7)

—

by

(a) Explain why charge air coolers are fitted to turbo-charged diesel engines, stating the possible effect on engine and performance if they are not maintained in good condition (6) (b) As Chief Engineer Officer, write instructions for the routine in-service checking of charge air cooler performance and cleanliness together with the checking of condensate draining.…

EK Motor Dec 2020 (Q6)

—

by

(a) Describe, with the aid of a sketch, a diesel engine fuel system which employs direct injection of liquid gas into engine cylinders (12) (b) Explain the advantages of this type of gas injection system compared with the use of gaseous fuel in the form of gas (4) Dual fuel Dec 2020 (Q6)

EK Motor Dec 2020 (Q5)

—

by