BECC Mod 6 Questions and Answers Already Passed

BECC Mod 6 Questions and Answers Already Passed Which pump uses a high velocity jet of seawater to lower the pressure in the chamber around the converging nozzle? Jet (TRUE/FALSE) A fixed volume of fluid is discharged by an eductor regardless of head pressure. False Which type of heat exchanger has one or more coils of tubing installed inside a shell? Helical tube Which type of heat exchanger uses one fluid flow at right angles (90°) with the other fluid? Cross flow type The gear that is widely used in the main reduction gear C The gear that is used to transform rotary motion to linear motion? E Which is a worm gear? B The rubber-lip-type seal assembly is know as....... seals. Syntron The shafts radial alignment, within the hull of the ship, is maintained by the ........ Line shaft bearings Which gear is known as the Bull Gear? Second reduction gear The high speed flexible coupling is used to couple turbines to the ...... First reduction pinion Which is a needle bearing? E Which bearing absorbs the axial movement of the propulsion shaft? A Which is lined with babbit material? B What 3 items are used to measure fuel oil in tanks? A.Tank gauge, tank table, sounding tape What type of reading sight glass uses a vertical pipe with a magnetic float that rides on the surface of the fuel oil? Indirect reading sight glass What part of the AMCW prevents overheating by allowing seawater to flow through the pump during low load conditions? Recirculation line In which type of coupling are the shafts out of line and at an angle? E Which coupling does not accommodate for any misalignment? C Which is a pin type coupling? A Used to close the end of a internally threaded pipe fitting. H Used to connect straight sections of pipe for easy assembly and disassembly. F Which is the straight coupling? B Removes debris and prevents clogging of small cooling passages in the auxiliary machinery and orifices serviced by the AMCW system. E Which component connects the AMCW system discharge back to the sea? J Prevents the orifice from becoming clogged with debris. C (True/False) Calcium Hypochlorite is classified as dangerous materials and requires special storage precautions. True What are the two types of bromine feeder the Navy uses onboard ships? Automatic proportioning and recirculating What type of pump uses the throwing force of a rapidly revolving impeller? Centrifugal pump Which type of gear arrangement has the advantage of producing a large speed reduction or increase in a compact unit? B Which gear is the rack and pinion gear? E Which is the double helical gear? C Which pump uses a piston to move a fluid? Reciprocating Heat transfer from physical contact between two substances is known as ....... Conduction U-bend construction one tube inside of another. allows for expansion and contraction Double tube Limits axial movement of ship propeller shafts. A Ball bearing. F What is used to connect turbines and reduction gear while allowing slight misalignment? High speed flexible couplings Which does not allow for misalignment? C Which does not have any connecting links? B Which coupling is mainly used in propulsion plant spaces as valve reach rod connections for operation of valves in remote locations? E Changes the direction of a piping run G Changes the size of a piping run D The gear cut used to reduce axial thrust, produce smoother action, and reduce gear tooth stress is known as: Double helical The cavity or opening in the hull of the ship below the waterline where seawater can enter the ship. I Prevents the orifice from becoming clogged with debris. C Heat exchanger D Flow limiting orifice B What type of tank is used to hold water for boilers? Feed water tanks (True/False)The shaft must be stopped and locked before inflating the shaft seal. True Line shaft bearing temperature and oil flow should be monitored ....... Hourly Needle bearing? E Which component absorbs motion between resilient mounted machinery and fixed or resilient mounted piping systems? Flexible hose assembly Potable water system hoses must be labeled? Potable water only Brominators disinfect water by ....... to prevent the growth of bacteria. Chemically treating What does A represent? Pipe cap What does B represent? Straight coupling What does C represent? Short nipple What does E represent? Pipe tee What is figure F? Gear coupling What is figure E? Universal joint What are the 3 types of misalignments? Offset, angular, offset angular What is the purpose of a fuel service tank? To hold fuel for immediate use What does F represent? Union coupling What does D represent? Reducing coupling What collects oil as it drains from drains or gears? Sumps What is figure A? Pin coupling What is figure C? Rigid flange What is figure A? External spur What is figure F? Single helical What is figure B? Worm and Wheel What is figure D? Bevel gear What is figure C? Double helical What is figure E? Rack and Pinion What is figure A? Kingsbury thrust bearing What is figure E? Rack and Pinion What is figure D? Tapered roller bearing What is figure B? Split journal bearing What is figure B? Rubber jaw What is figure F? Roller/Ball bearing What pump has 2 gears that mesh together and revolve in opposite directions Gear pump what pump traps and forces liquid through pump by rotating screws Screw pump what pump discharges a fixed volume each revolution regardless of head pressure rotary pump what is the purpose of gears change direction of motion, speed, and torque what is the advantage of a single helical gear runs quietly due to design what is the purpose of a rack and pinion gear change rotary motion to linear what gear has teeth cut straight across the outside of the rim external spur gear what is the purpose of a worm and wheel gear large speed reduction or increase in a compact unit what gears are used on valve remote operated handwheels bevel gears a rotary pump is _________priming and is a _______displacement pump self;positive what is the purpose of bearings support and guide moving parts of a machine friction between two things separated by liquid fluid friction reduce friction between two objects by separating with balls rolling friction one object sliding against or on another object sliding friction what tank holds fuel before its purified storage tank what prevents tanks from surging baffles