Тест по работе рулевого механизма (CES v5.0)

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Правильні відповіді:
1

According to SOLAS, what special steering gear requirement must passenger ships meet, that not all other ships require?

Ваша відповідь правильна:

Each power unit, on its own, must be able to move the rudder from 35° on either side to 30° on the other side in not more, than 28 seconds.
2

According to SOLAS, what special steering gear requirement must tankers above 10 000 tonnes meet, that other ships do not require?

Ваша відповідь правильна:

There must be oil leak detection, and steering capability must be regained within 45 seconds following the loss of one power actuating system.
3

According to SOLAS rules, the rudder should move from 35° one side to 30° on the other side in a maximum of 28 seconds for which one of the following:

Правильну відповідь:

The main steering gear of all ships, other than those with special requirements, such as those with non-conventional steering arrangements.

Ваша відповідь:

The main and auxiliary steering gear of all ships, other than those with special requirements, such as those with non-conventional steering arrangements.
4

According to the SOLAS rules, the steering gear should be capable of being recharged with hydraulic oil from a fixed storage tank. What is the main reason for this?

Правильну відповідь:

To ensure, that the steering gear can be rapidly recharged with clean hydraulic oil in the event of a leak from the system.

Ваша відповідь:

To ensure, that the correct grade of oil is always used.
5

According to the SOLAS rules, the rudder angle from mid-ships to Port and Starboard should be at least:

Ваша відповідь правильна:

35°.
6

According to the SOLAS rules, when must ships fitted with more, than one steering gear power unit have at least two of these units running?

Ваша відповідь правильна:

In all cases, in areas, where navigation demands special caution.
7

For an electro-hydraulic steering gear, if the standby pump fails to start, following a failure of the running pump, which one of the following best describes the likely cause?

Ваша відповідь правильна:

The pump has not been set to standby or its power supply has been switched off.
8

For an electro-hydraulic steering gear, if there is a lot of movement of the wheel in hand steering mode before the steering gear responds, which one of the following best describes the likely causes?

Ваша відповідь правильна:

Air in the hydraulic control system.
9

If the rudder will not hold a helm angle in manual or non-follow up mode, which one of the following statements gives the most likely causes?

Ваша відповідь правильна:

A hydraulic fluid leak in the hydraulic control or power systems.
10

If the ship suddenly doesn’t steer in the direction intended, but no steering gear alarms activate, what is the most likely cause?

Ваша відповідь правильна:

A failure in the remote rudder angle indication system.
11

If there are no alarms, but the ship stops responding correctly to helm orders, which one of the following best describes the likely causes?

Ваша відповідь правильна:

A failure in the remote rudder angle indication system.
12

In accordance with SOLAS, when must both steering gear power units be in use?

Ваша відповідь правильна:

In areas, where navigation demands special caution.
13

In the event of an oil leak on a steering gear fitted with an automatic change-over system, at what point should the system be automatically split into two?

Ваша відповідь правильна:

When a main low level alarm operates on either hydraulic oil tank.
14

Requirements for steering gears are given in which one of the following publications?

Ваша відповідь правильна:

SOLAS.
15

Steering gear alarms can only be acknowledged from which one of the following?

Ваша відповідь правильна:

The wheel house.
16

The force generated by a steering gear hydraulic system depends on:

Ваша відповідь правильна:

The hydraulic pressure and the area it acts on.
17

The main purpose of emergency steering drills is to:

Ваша відповідь правильна:

Make sure, that enough of the ship’s crew are trained to carry out emergency steering.
18

The ship is at sea and an order to switch over to local steering is given. What knowledge will you need in particular?

Ваша відповідь правильна:

What you have learnt during emergency steering drills, and the emergency operating procedures.
19

The steering mode in which the rudder angle is pre-set manually and kept in position automatically, is called:

Ваша відповідь правильна:

Follow up mode.
20

What is the main purpose of the safety valve on a hydraulic steering gear?

Ваша відповідь правильна:

To protect the actuator against too high an oil pressure.
21

What is the most likely cause of the hydraulic lock alarm occurring on a steering gear system?

Ваша відповідь правильна:

A failure in the control system, such as a directional valve sticking open.
22

What is the purpose of the rapson slide on a ram type steering gear?

Ваша відповідь правильна:

It converts the linear movement of the rams into rotation of the tiller.
23

What special requirement for steering gears is applied to any ship over 70 000 tonnes?

Ваша відповідь правильна:

The main steering gear must have two or more identical power units.
24

What types of valves are actuated in order to move the rudder, when local steering is being carried out?

Ваша відповідь правильна:

Directional valves.
25

When a heavy sea strikes the rudder, which one of these statements best describes what will happen?

Ваша відповідь правильна:

If the force is large enough, the hydraulic pressure in the steering gear will be high enough to operate the safety valve, and the rudder will move.
26

When in emergency steering mode from the steering flat, how is movement of the steering gear usually created?

Ваша відповідь правильна:

Start at least one power unit and activate the direction valve.
27

Where a steering gear is fitted with oil leak detection, what would be the first alarm in the event of loss of oil?

Ваша відповідь правильна:

Low level alarm in the hydraulic fluid tank.
28

Where is steering gear is fitted with oil leak detection, in the event of loss of oil, what would happen before a second pump automatically started?

Ваша відповідь правильна:

The hydraulic system would need to be automatically split.
29

Where a steering gear is fitted with oil leak detection, in the event of loss of oil, what would the first alarm be, and what would happen?

Ваша відповідь правильна:

The first low level alarm would be activated, but the pump or pumps, that had been running will continue to run.
30

Where are remote rudder angle indicators usually fitted?

Ваша відповідь правильна:

At the bridge steering console and on the bridge wings.
31

Where is the changeover to local steering carried out?

Ваша відповідь правильна:

The steering compartment.
32

Which is the only one of the following NOT known to have, caused moisture to have contaminated the hydraulic oil, used for the steering gear?

Ваша відповідь правильна:

A leaking rudder stock gland.
33

Which is the only one of the following, that is NOT likely to cause overheating of a hydraulic steering gear?

Ваша відповідь правильна:

Leakage of hydraulic fluid.
34

Which of the following are disadvantages of using ram type steering gear, compared to rotary vane gear?

Ваша відповідь правильна:

The ram type needs a separate rudder carrier bearing.
35

Which of the following statements best describes the importance of the purity of the hydraulic oil used in steering gear?

Ваша відповідь правильна:

Even small solid particles will cause wear, whilst moisture will cause corrosion.
36

Which one of the following is NOT caused by air in a steering gear hydraulic system?

Ваша відповідь правильна:

Rudder tends to return to mid-ships.
37

Which one of the following statements about steering gear is NOT correct?

Ваша відповідь правильна:

A main steering gear must be able to move the rudder from 30° on either side to 30° on the other side in less than 28 seconds.
38

Which one of the following statements best describes the actions, would you take if there is a leak of hydraulic fluid from a steering gear, which does not have an automatic change-over system?

Ваша відповідь правильна:

Isolate the leaking part of the steering gear by following the procedures on the emergency steering instructions.
39

Which one of the following statements best describes the arrangement of steering gear alarms?

Ваша відповідь правильна:

Steering gear alarms can only be acknowledged on the bridge, but are indicated elsewhere.
40

Which one of the following statements best describes the check, carried out during emergency steering drills?

Ваша відповідь правильна:

All emergency arrangements must be tested including operation from the steering compartment and communication with the bridge.
41

Which one of the following statements gives one of the steering gear requirements for passenger ships?

Ваша відповідь правильна:

Each power unit must be capable of moving the rudder from 35° on either side to 30° on the other side in not more, than 28 seconds.
42

Which one of the following would NOT cause slow rudder movement?

Ваша відповідь правильна:

Air in the hydraulic control system.
43

Which one of the phrases given in the options most accurately completes the following statement? A leaking safety valve on a hydraulic steering system is most likely to cause, which one of the following:

Ваша відповідь правильна:

Slow rudder movement.
44

Which one of the phrases given in the options most accurately completes the following statement? According to the SOLAS rules, if a ship has more, than one rudder and can be maneuvred with only one rudder, then:

Ваша відповідь правильна:

Only one main steering gear needs to be fitted to each rudder.
45

Which one of the phrases given in the options most accurately completes the following statement? The safety valve on a steering gear hydraulic system is most likely to operate because:

Ваша відповідь правильна:

A heavy sea has hit the rudder.
46

Which one of the phrases given in the options most accurately completes the following statement? The ships steering gear must normally be checked and tested by the ship’s crew:

Ваша відповідь правильна:

Within 12 hours before departure.
47

Which one of the situations described below may cause the need for local steering?

Ваша відповідь правильна:

If the bridge is put out of action.
48

Which one of these statements about rudder carrier bearings is true?

Ваша відповідь правильна:

A separate rudder carrier bearing is only required on ram type steering gears.
49

Which one of these statements about the force, developed by a hydraulic system is true?

Ваша відповідь правильна:

Force equals pressure times area.
50

Which one of these statements about types of steering gear is true?

Ваша відповідь правильна:

Higher pressures are needed for the ram type.
51

Which one of these statements best describes the effect of using two steering gear hydraulic pumps instead of one?

Ваша відповідь правильна:

The speed of rudder movement is greatly increased.
52

Which part of the hydraulic circuit controls the movement of the rudder from port to starboard?

Ваша відповідь правильна:

The directional valve.
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