Mock Test - Unit 303 Marine Engineering

What is the reason for connecting an engine to a Z drive?

• To allow for rapid changes in thrust direction and thus vessel direction. This eliminates the need for a conventional rudder.

• For generating the big wakes

• For maneuvering in shallow waters

• For maneuvering in shallow waters

The Flashback Arrester on an Ocy-acetylene welder should be fitted between the

• Between the regulators and the hoses

• Between the regulators and the tanks

• Between the hoses and the regulators

• The check valves and the torch

Which of the following is used to maintain domestic water pressure on a yacht?

• Calorifier

• Water Pump

• Gravity

• Hydraulic actuators

What is the purpose of a trailing log on a boat?

• For measuring the speed of a vessel through the water

• For supporting the structure of the transom

• For measuring the depth of the water

• For marking the water line

What is the purpose of a Gallery bolt?

• For fastening engines to wooden engine beds

• For use in boat framing

• For use in narrow rudders sections

• For use in scarf joints

Which adhesive sealant is commonly used to secure marine glazing systems?

• Epoxy resin

• Polyurethane

• Casein

• PVA

what is this?

• Female mould

• Female plug

• Male mould

• Male plug

Dorade vents should remain water-tight how?

• An electrical sensor that detects water, and closes the vent

• By using a bedding and sealing coumpound to ensure no water can enter the vent

• By allowing air to pass relatively freely through the chambers, whilst trapping water in successive chambers to drain out the small holes

• A spring-loaded mechanism that closes the vent below as soon as water falls on it, and drains to let the water out.

Fittings that are subject to heavy loadings should be fastened with?

• Blind bolts

• Through bolts

• Coach screws

• Round head screws

The most effective method of fixing the position of a yacht at sea is by using

• Sextants

• Areollial

• Chart plotter

• Navigational charts