Author: UKM TUTICORIN

—

by

With reference to centrifugal pumps and pumping systems: (a) Explain the principle of operation of a centrifugal pump; (4) (b) Define net positive suction head available (NPSHa); (2) (c) State the effects of temperature on NPSHa; (2) (d) Describe how the effects of temperature can be overcome. (2) 10 marks Dec 2024 Pumps & system…

EK General Dec 2024 (Q4)

—

by

With reference to mycobacterial infestation: (a) List the engine room systems that may be affected by this type of contamination; (2) (b) Explain the conditions required for bacteria to evolve; (6) (c) Describe how the presence of microbial contamination could be detected. (2) 10 marks Dec 2024, Dec 2021, Dec 2018 Lubricating oil & system…

EK General Dec 2024 (Q3)

—

by

With reference to oil filled stern tubes: Describe, with the aid of a sketch, the principle of operation of a combination seal, which incorporates a wrapped bellows radial face seal and a lip seal. (10) 10 marks Dec 2024, Mar 2024, Aug 2020 Propeller, shafting & thrusters Dec 2024 (Q3)

EK General Dec 2024 (Q2)

—

by

(a) Sketch an annotated block diagram of a closed loop control circuit. (5) (b) Describe how the control loop sketched in Q(a) operates. (5) 10 marks Dec 2024, Mar 2021 Instrumentation & control Dec 2024 (Q2)

EK General Dec 2024 (Q1)

—

by

(a) Describe, with the aid of sketches, how the test pieces for a Class 1 pressure vessel are obtained. (6) (b) List the tests which are carried out on the test pieces described in Q(a). (4) 10 marks Dec 2024, Jul 2019 Materials Dec 2024 (Q1)

EK General Oct 2024 (Q8)

—

by

(a) With reference to bunkering fuel oil, list the information to be supplied to the port authorities prior to commencement of bunker operations. (5) (b) With reference to the tank being filled, state the factors that govern the bunker loading rate. (4) (c) State a possible effect of a high bunker loading rate. (1) 10…

EK General Oct 2024 (Q7)

—

by

With reference to the treatment of domestic water for potable use: (a) Describe the principle of operation of a steriliser that uses silver ions (4) (b) State the advantages of silver ion sterilisation over other methods (2) (c) State the inspections and maintenance that should be carried out on EACH of the following: (i) Fresh…

EK General Oct 2024 (Q6)

—

by

With reference to a vapour compression refrigeration plant, explain the purpose of EACH of the following: (a) Room thermostat (2) (b) Expansion valve (2) (c) High pressure cut out (2) (d) Safety head (2) (e) Unloader (2) 10 marks Oct 2024 Reefer & A/C Oct 2024 (Q6)

EK General Oct 2024 (Q5)

—

by

Describe, with the aid of a sketch, the operation of a biological sewage treatment plant (10) 10 marks Oct 2024, Oct 2022 Sewage system Oct 2024 (Q5)

EK General Oct 2024 (Q4)

—

by