Small Vessel Second Engineer 060-03 Exam: Auxiliary Equipment Part I

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Questions and Answers

What is the definition of absolute humidity?

The ratio of the mass of water vapor in the air to the mass of dry air

The ratio of the mass of water vapor in the air to the volume of the air-water vapor mixture (correct)

The amount of water vapor in the air compared to the maximum amount of water vapor the air can hold at a given temperature

The temperature at which water vapor in the air will start to condense into liquid water

What is the purpose of a flameproof enclosure?

To contain any explosion that may occur within the enclosure and prevent it from igniting the surrounding atmosphere (correct)

To protect electrical equipment from the effects of fire

To isolate electrical equipment from the external environment and prevent the ingress of flammable gases or vapors

To provide a safe environment for operating electrical equipment in hazardous areas

What is the effect of single phasing on a motor?

The motor will overheat and potentially catch fire (correct)

The motor will not start at all

The motor will experience increased torque and vibration

The motor will run at a reduced speed

How can steering be maintained if the telemotor system fails in an electro-hydraulic steering gear?

By manually operating a hand wheel that is connected to the steering gear Signup and view all the answers

What is the definition of relative humidity?

The amount of water vapor in the air compared to the maximum amount of water vapor the air can hold at a given temperature Signup and view all the answers

What is the purpose of the devices fitted to a main distribution switchboard to protect AC generators operating in single or parallel mode?

To provide overcurrent and overload protection for the generators Signup and view all the answers

What is the definition of dew point?

The temperature at which water vapor in the air will start to condense into liquid water Signup and view all the answers

How can steering be achieved if there is a total failure of the hydraulic system in an electro-hydraulic steering gear?

By manually operating a hand wheel that is connected to the steering gear Signup and view all the answers

Which of the following is NOT a method for remote operation of tank quick closing valves?

Mechanical linkage Signup and view all the answers

Why are centrifugal pumps not self-priming?

They require a suction lift to create a vacuum Signup and view all the answers

Which of the following is NOT a typical safety feature of a main air receiver?

Automatic lubrication system Signup and view all the answers

In the hydraulic system shown in the worksheet, what is the function of the accumulator?

To store energy for emergency operation Signup and view all the answers

What is the purpose of the relief valve in a hydraulic system?

To prevent excessive pressure buildup Signup and view all the answers

Which of the following is NOT a function of air conditioning?

Generating propulsive power Signup and view all the answers

At what pressure should the relief valve on a main air receiver typically lift?

1.25 times the maximum working pressure Signup and view all the answers

Study Notes

Humidity

Absolute humidity: the mass of water vapor present in a given volume of air
Relative humidity: the ratio of the mass of water vapor present in the air to the mass of water vapor required to saturate the air at a given temperature

Electrical and Safety Systems

Flameproof enclosure: designed to prevent explosions by containing any ignition sources within the enclosure
Purpose of devices on main distribution switchboard: to protect AC generators operating in single or parallel mode
Relief valve on main air receiver: typically lifts at a pressure of around 10 bar to prevent over-pressurization

Steering Systems

In electro-hydraulic steering gear, steering can be maintained if the telemotor system fails by using a backup system or manual steering
In case of total failure of the hydraulic system, steering can be achieved using an emergency steering system or manual steering

Pumps and Valves

Centrifugal pumps: not self-priming, requiring a priming pump or foot valve to operate
Remote operation of tank quick closing valves: methods include electric, pneumatic, or hydraulic actuation, but NOT manual operation
Accumulator in a hydraulic system: stores energy and supplements the pump during peak demand or in case of pump failure
Relief valve in a hydraulic system: protects the system from over-pressurization by diverting excess fluid to a reservoir

Air Conditioning

Typical safety feature of a main air receiver: pressure gauge, safety valve, and drain valve
NOT a function of air conditioning: increasing humidity

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Description

Prepare for the Small Vessel Second Engineer 060-03 exam on Auxiliary Equipment Part I administered by the Scottish Qualifications Authority on behalf of the Maritime and Coastguard Agency. This quiz focuses on topics related to auxiliary equipment used in small vessels.