Skip to content
MaritimeTest
Log in

Slow Speed Propulsion

CES Engine Operational 442 questions

Also studied by: CES test for engine cadets

First 5 of 442 questions — with answers

The correct answer is marked. Unlock the rest to study the whole test, online or offline.

  1. Question 1

    Code: 43knDhu$ Many large slow speed diesel engines operating on heavy fuel oil have a fuel injection system which features Variable Injection Timing. How does this affect engine operation?
    • VIT increases engine efficiency by automatically maintaining the maximum cylinder pressure over part of the load range.
    • VIT allows the ship's engineers to alter the injection timing for each load setting with a simple single adjustment of the fuel rack.
    • VIT increases engine efficiency by automatically maintaining the maximum cylinder pressure over the entire load range.

  2. Question 2

    Code: g9TPlr$ A seawater pump requires overhaul but there are no spare wear rings for the casing and impeller. It is decided that new wear rings will be fabricated onboard using the ship's lathe. What would be the most suitable material to use to fabricate the rings onboard?
    • Aluminium brass.
    • Zinc.
    • Mild steel.
    • Aluminium.

  3. Question 3

    Code: YTYhXuyZ During maintenance work on a main diesel engine the fuel injection valve is found to be jammed in the pocket in the cylinder cover. Which of the procedures given in the options should be followed in order to complete the work?
    • Replace the complete cylinder cover with a spare unit and land the cover with the jammed valve ashore for repair in a specialist workshop.
    • With the fuel injection valve retaining nuts removed admit compressed air into the engine cylinder to try and blow the injection valve out of the pocket.
    • Remove the cylinder cover and try and drive the injection valve out of the pocket from the underside with a hammer and punch.
    • Wedge a bar between the piston top and the bottom of the injector and use the turning gear to force the injection valve out.

  4. Question 4

    Code: DiHWrBmZ A large electric motor is being removed from a main seawater pump with the aid of the engine room crane. Which is the best method of starting the lift from the options given?
    • Use a suitable chain block suspended from the crane hook to "break" the motor free after slackening all of the retaining bolts.
    • Use the "inch up" facility on the crane to "break" the motor free after slackening all of the retaining bolts.
    • Use the full hoist facility on the crane to "break" the motor free after slackening all of the retaining bolts.
    • Use the full hoist facility to lift the motor clear in one action after removing all of the retaining bolts.

  5. Question 5

    Code: 0FrjAdyZ Modern slow speed, two stroke diesel engines often have locating pins or pegs to keep the piston rings in a fixed position. Why is this arrangement used?
    • It avoids the risk of the ends of the piston rings being forced out by the gas pressure and catching on the scavenge ports.
    • It ensures the rings cannot be mixed up and that they are fitted in the correct order on the piston.
    • The piston ring gaps can be kept in line to control the gas pressure on each of the rings.
    • The piston rings are more difficult to lubricate because of the slow operating speeds and will wear more quickly if they are allowed to rotate.

Preview — 5 of 442 questions

You are seeing the first 5 questions with answers. Unlock the remaining 437 to study the whole test — online or offline.

About this CES test

Slow Speed Propulsion is a CES test for the Engine department at Operational level with 442 questions and verified answers. Common topics include: diesel engine, high voltage, large slow, centrifugal pump, graphical symbol, heavy fuel, water system, maintenance work.

You can practise the free questions online — one at a time, with the correct answer — or unlock the whole test and download it to study offline, without internet.

Related CES tests