Tag: #kineticenergy

  • Cargo pumps & tankers
  • EK Electrical Dec 2023 (Q10)

    EK Electrical Dec 2023 (Q10)

    With reference to braking of a.c. induction motors: (a) Explain why braking may be required (2) (b) Explain why electrical braking is preferable to mechanical braking (2) (c) Explain the term plugging (2) (d) Describe how dynamic braking is achieved (4) Dec 2023 (Q10)

  • EK Electrical Dec 2020 (Q10)

    EK Electrical Dec 2020 (Q10)

    With reference to braking of a.c. induction motors: (a) Explain why braking may be required; (2) (b) Explain why electrical braking is preferable to mechanical braking; (2) (c) Explain the term plugging; (2) (d) Describe how dynamic braking is achieved. (4) Dec 2020 (Q10)

  • EK General Dec 2024 (Q5)

    EK General Dec 2024 (Q5)

    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 Oct 2023 (Q4)

    EK General Oct 2023 (Q4)

    With reference to centrifugal pumps: (a) Explain the operating principle of a centrifugal pump, stating why it is necessary to fit a relief valve to it (3) (b) Explain why some pumps have a double entry impeller (2) (c) Describe a routine overhaul of a centrifugal pump, stating the inspections, measurements and possible replacement parts…

  • EK General Mar 2022 (Q5)

    EK General Mar 2022 (Q5)

    With reference to centrifugal pumps: (a) Explain the principle of operation of a centrifugal pump (4) (b) Explain why centrifugal pumps are not self priming (2) (c) State why some pumps may have EACH of the following (i) A double entry impeller (2) (ii) More than one impeller (2) Pumps & system Mar 2022 (Q5)

  • EK General Oct 2019 (Q5)

    EK General Oct 2019 (Q5)

    With reference to centrifugal pumps: (a) Explain the operating principle of a centrifugal pump and state why it is unnecessary to fit a relief valve to it; (2) (b) Explain why some pumps have a double entry impeller; (2) (c) Describe a routine overhaul of a centrifugal pump, stating the inspections, measurements and possible replacement…