MM "A School" Test 1

Anything which flows or can be made to flow is called...

FLUID

Force is measured in what units?

POUNDS OR TONS

Fluid power is defined as what?

POWER TRANSMITTED & CONTROLLED THROUGH THE USE OF A PRESSURIZED FLUID

Streamline flow where particles flow smoothly is called?

LAMINAR FLOW

A random or erratic pattern of flow is called?

TURBULENT FLOW

What is the purpose of a hydraulic pump?

CONVERT MECHANICAL FORCE & MOTION INTO INCREASED FLUID PRESSURE

What are the 2 classifications of hydraulic pumps?

FIXED DISPLACEMENT & VARIBLE DISPLACEMENT

Which hydraulic pump delivers fluid at a constant flow rate?

FIXED(CONSTANT)

A pump that can change fluid flow rate without changing the speed of the prime mover is called?

VARIABLE

What are the 2 types of fluid storage and what sized systems are they used for?

RESERVOIRS FOR SMALL SYSTEMS,

SUMPS FOR LARGE SYSTEMS

What valve maintains system pressure by diverting fluid flow back to sumps or reservoirs?

UNLOADING VALVE

What converts fluid power to mechanical motion & force?

ACTUATOR

What converts fluid power to linear mechanical force & motion?

CYLINDER

What can be made to work in either a single direction or both directions?

SINGLE CYLINDER; SINGLE PISTON

What type of actuator is used for long work strokes?

TELESCOPING

What valve maintains a specific pressure on one area of the system?

SEQUENCING VALVE

What is the purpose of hydraulic system heat exchangers?

REMOVES HEAT GENERATED BY THE EQUIPMENT TO MAINTAIN THE OPTIMAL OPERATING TEMP. OF THE HYDRAULIC FLUID

True or False: Liquid is compressed to create hydraulic pressure?

FALSE

What is the purpose of the steering gear?

CONVERT AN ELECTRICAL SIGNAL FROM BRIDGE OR MECHANICAL SIGNAL FROM TRICKWHEEL TO POSITION & HOLD THE SHIP'S RUDDER AT A SELECTED ANGLE UNDER LOAD CONDITIONS

What is the purpose of the main pump?

PROVIDES HIGH PRESSURE HYDRAULIC FLUID TO RAM CYLINDER TO MOVE RAM

What is the purpose of the auxiliary pumps?

PROVIDES FLUID FOR THE REPLINSHING & SERVO CIRCUITS

What is meant by the term "Electro-Hydraulic" system?

ELECTRIC MOTOR DRIVEN HYDRAULIC PUMP THAT CREATES PRESSURE, WHICH DRIVES A HYDRAULIC MOTOR

What is the prime mover for the steering gear hydraulic pump?

ELECTRIC MOTOR

What uses hydraulic fluid power created by the main pump to move the rudder?

RAM & CROSSHEAD ASSEMBLY

Which component shifts control from the online HPU to the standby HPU if the online unit fails?

AUTO-CHANGE OVER TRANSFER SWITCH

How is the auto-change over transfer switch activated?

LOW PRESSURE, OVERLOAD, LOSS OF POWER, OR LOW VOLTAGE

What does the differential control unit do?

COMPARES ORDERED RUDDER ANGLE WITH ACTUAL RUDDER ANGLE TO PLACE PUMP ON OR OFF STROKE

Connecting link between the differential control unit and the main hydraulic pump is called?

ROTARY SERVO CONTROL & CONTROL ROD

What controls the flow of fluid from the online HPU to the ram and maintains a hydraulic lock on the ram once the desired rudder angle has been reached?

TRANSFER & BLOCKING VALVE

What provides mechanical feedback from the rudder to the differential control unit?

FOLLOW-UP ASSEMBLY

The ram convers _________ energy to ________ energy

FLUID; MECHANICAL

The crosshead converts _______ to _______

LINEAR MOVEMENT OF RAM ; RADIAL MOVEMENT OF RUDDER POST

The component the meets peak demands that may exceed the auxiliary pump capacity is called?

ACCUMULATOR

Under normal conditions which sound powered telephone circuit is used for communication between the bridge and steering?

1JV

What color is hydraulic system piping?

ORANGE

What is the purpose of the Rudder Angle Indicator?

TO INDICATE THE POSITION OF THE RUDDER

What are the 3 types of Rudder Angle Indicators?

MASTER/ACTUAL, LOCAL, & REMOTE

What is the purpose of the anchor windlass?

TO PAY OUT OR HEAVE IN THE ANCHOR

_________ allows the anchor to fall under its on weight?

FREEFALL

Which drum is fitted with whelps to engage the anchor chain?

WILDCAT

_______ are projections that fit into anchor chain links?

WHELPS

What are the 2 types of anchor windlass?

VERTICAL SHAFT; HORIZONTAL SHAFT

What are the types of anchor windlass power units?

HYDRAULIC, ELECTRIC, & STEAM

What is used to engage/disengage the wildcat from the capstan drive shaft?

WILDCAT CLUTCH

How do we control operation/position of anchor windlass?

MASTER DRUM SWITCH

What is the purpose of the electromagnetic disc brake?

TO PREVENT THE CAPSTAN FROM ROTATING IN THE EVENT OF A POWER LOSS

What are the 4 positions of the load/unload device?

LOAD, STOW, UNLOAD, & INDEXING

What are the 2 modes of conveyor operation?

INDEXING & CONTINUOUS

What is used to adjust drive chain tension?

IDLER TENSIONER

How many personnel are required at each conveyor operating level and what are their titles?

3.

SUPERVISOR, SAFETY OBSERVER, & PACKAGE HANDLER

True or False: The safety observer must know the role of all conveyor operating personnel?

TRUE

What prevents conveyor operation if 2 or more doors are open?

DOOR INTERLOCK

What is the purpose of the torque limiter?

COUPLES MOTOR TO SPEED REDUCER

What stops the conveyor when a package is traveling out of bounds?

JAM LIMIT ASSEMBLY

Which safety device prevents door closing if the load/unload device is in any position except stow?

DOOR BLOCK

What safety device used infrared light and reflector to protect against damage to packages left on conveyors during strike up?

PHOTO ELECTRIC UP & OVER TRAVEL ASSEMBLY

What is Thermal Energy & what is it called in transition?

THE DIFFERENCE BETWEEN AN OBJECTS INTERNAL ENERGY AT THAT WHICH IT WOULD HAVE AT ABSOLUTE ZERO.

;HEAT

What are the methods of heat transfer?

conduction, convection, radiation

What is temperature?

MEASURE OF INTENSITY OF HEAT

What are the 2 kinds of heat and what are their effects?

SENSIBLE- CHANGE IN TEMP, BUT NOT PHYSICAL STATE

LATENT- CHANGE IN PYSICAL STATE ,BUT NOT TEMP

What's Boyle's Law?

AT CONSTANT TEMP. A CHANGE IN PRESSURE CAUSES AN INVERSELY PROPORTINAL CHANGE IN VOLUME

What's Charles' Law?

AT CONSTANT PRESSURE, INCREASE/DECREASE IN TEMP. WILL CAUSE PROPORTINAL INCREASE/DECREASE IN VOLUME

What is saturation temperature?

TEMP. AT WHICH LIQUID BOILS UNDER A GIVEN PRESSURE

What are the 5 major components in the basic refrigeration cycle?

COMPRESSOR, CONDENSER, RECEIVER, TXV, EVAPORATOR

Where does the high pressure side of the basic refrigeration cycle begin & end?

BEGINS AT COMPRESSOR

ENDS AT TXV

Where does the low pressure side of the basic refrigeration cycle begin & end?

BEGINS AT TXV

ENDS AT COMPRESSOR

Which component controls refrigerant flow into the evaporator?

TXV

What contains a chemically treated element that changes color to indicate moisture level in the refrigerant?

MOISTURE INDICATOR

Which component is used to prevent low temperatures in multiple spaces running off of one compressor?

EVAPORATOR PRESSURE REGULATOR VALVE

What's installed in the compressor discharge line to protect from excessive pressure?

SPRING-LOADED RELIEF VALVE

Which type of hand operated valves are used in the refrigerant plant?

PACKLESS VALVES

What is used as the cooling agent, used to absorb heat in A/C & R systems?

REFRIGERANT

Physical contact with refrigerant will cause what type of injury?

FROSTBITE

What is the highest temperatures gas cylinders should be exposed to?

130 DEGREES

What rule should be observed when entering A/C & R spaces?

2 MAN RULE

What is the purpose of area monitor leak detectors?

CONTINOUSLY MONITORS A SPECIFIC COMPARTMENT AREA & GIVE AUDIBLE/VISUAL ALARM IF THERE'S A LEAK

What is the purpose of portable leak detectors?

PINPOINTS THE LEAK

What are the 4 types of portable leak detectors?

FLUORESCENT DYE, ELECTRONIC, HALIDE TORCH, SOAPSUD