Midterm (Quizzes) Flashcards
In this pump, the first stroke of the piston creates a vacuum, opens an inlet valve, closes the outlet valve and draws fluid into the piston chamber (the suction phase).
Piston Pump
These pumps can handle high thickness fluids & solids without hurting them
Lobe Pumps
It operates on the same principle, but the two interlocking gears are of different sizes with one rotating inside the other
Gear Pump
It is essentially resistance to flow
Viscosity
As the fluid enters the pump, it becomes trapped between the gaps in the ____
screws
These pumps are a kind of rotating positive dislocation pump, which means they force a stable amount of liquid for every revolution
Gear Pump
It is a type of positive-displacement pump that consists of vanes mounted to a rotor that rotates inside a cavity
Rotary Vane Pump
It operates by alternating filling a cavity and then displacing a given volume of liquid
Positive Displacement Pumps
A characteristic of positive displacement, and especially reciprocating, pump designs
Pulsing Discharge
What is being provided to maintain dry bilges to prevent the possibility in accumulation of water or oil?
Bilge System
It used an external and an internal spur gears.
Internal Gear Pump
This is used to transport fluids by the conversion of rotational kinetic energy to the hydrodynamic energy of the fluid flow.
Centrifugal Pumps
It used two external spur gears.
External Gear Pumps
What do cyclic action of reciprocating pumps creates in the discharge with the fluid accelerating during the compression phase and slowing during the suction phase?
Pulses
It refers to a device that moves fluids (liquids or gases), or sometimes slurries, by mechanical action, typically converted from electrical energy into hydraulic energy.
Pump
In a stablizer, active fins are being cotrolled by what control system?
Gyroscopic
Part of the steering gear system that mediate the coordination between the generated hydraulic pressure from pumps and rudder stock
Actuator
The type of steering gear system which composed of four hydraulic cylinders attached to the two arms of the actuator disc, on both sides
Ram type steering
In a gyroscopic control system, how does fins counteract the external force to prevent rolling?
Fin’s angle
It an equipment which is provided in every ship to meneuver or turn the ship in different directions
Steering gear
These are fins or rotors mounted beneath the waterline and emerging laterally from the hull to reduce a ship’s roll due to wind or waves.
Stabilizer
A type of steering gear system which fluid pressure is developed through purely mechanical means.
Fully hydraulic
Fins in large vessels are provided with flaps to increase the fins lift by how many percent?
15%
Which of the following statement regarding steering gear is true?
It can only be operated when the ship is in motion
Steering gear actuators are now mainly electrically driven by ____
Power units
What benefits do retractable fins have over non-retractable fins?
It can save fuel consumption