CÂU hỏi và đáp án CHO kỹ sư MÁY(MARINE ENGINEERING QUESTIONS ANSWERS)

What is the fastening device shown at the left side of the drawing ? No > A A beam clamp B An angle iron fastener C A frame clamp D A support fastener Technical nomenclature What is the measuring instrument shown on the left top ? No > A An outside calliper B An outside pipe calliper C A Dornier calliper D A Vernier calliper Vernier caliper is the correct name What is the accuracy of the measuring instrument shown on the top left ? No > A 1/10th to 1/20th millimetre B 1/20th to 1/25th millimetre C 0.1 to 0.5 millimetre D 0.1 to 0.25 millimetre A vernier caliper has an accuracy of 0.1 to 0.05 mm , or 1/10 to 1/20th millimetres Suppose you need to draw a circle of 186 mm diameter on metal or on a packing sheet How would you this using the compass shown top centre ? No > A Measure 186mm on packing, draw lines through the centre B Set opening of compass legs to 93 mm using a steel ruler C Indicate straight line with points 0mm, 93mm and 186mm on packing D Project first a hexagon on packing or steel plate If you are to project a circle of "X" mm on a plane you are to adjust the opening of the compass legs at X : 'You this by setting the leg opening on a steel ruler and actual adjustment is done by adjusting the screw on the side of the What is the accuracy of a micrometer shown top right ? No > A 0.1 to 0.2 millimetres B 0.1 to 0.5 millimetres C 0.01 to 0.005 millimetres D 0.05 to 0.01 millimetres Option is correct 0.01 to 0.005 mm corresponds to between 1/100 and 1/200th of one millimeter What is the measuring device shown at the bottom ? No > A A tracing instrument B A right angle plane tracer C An angular tracer D A 90 degree angle projector Option is correct It is used to project 90 degree lines in relation to the side of the metal against which the measuring device is held What is the measuring device shown in the top and what is it used for ? No > A A thread gauge To measure thread size on bolts and studs B A bolt thickness gauge To measure the size of bolts C Thread thickness gauge Measure clearance of bolts and nuts D Thread wear down gauge Measures wear-down on bolts / nuts What measuring device is shown in the bottom left corner ? No > Self explanatory The thread patterns are held against the thread to see which one is matching A A pipe calliper B An inside tracer C An adjustable inside calliper D A bore calliper This inside caliper can be fine-adjusted by adjusting the screw fitted on the side which will keep the outward force in check brought by the top spring blade This type of caliper can be used with more accuracy than a simple two legged What is the purpose of the calliper shown in the bottom left corner ? No > A Measuring piston ring gaps B Measuring fuel pump lifts C Measuring inside diameters of hydraulic pipes D Measuring inside diameters or gaps This is an adjustable INSIDE caliper The spring blade on top forces the legs outward By releasing the screw after the caliper is inserted in the bore or gap the legs will slide against the inner surface of the item which is to be What is the measuring device shown in the right bottom corner ? No 10 > A A flange calliper B A pipe calliper C An adjustable pipe calliper D An adjustable outside calliper This is an adjustable OUTSIDE caliper used to measure diameters or outside measurements Its spring blade on top forces the legs outwards but the force is caught by the retaining screw How will the tool shown at the top be powered if it is to be used on tankers ? No 11 > A By battery power, 12 Volt maximum B By AC power 110 Volt, 60 Hz maximum C By compressed air 8.5 kg/cm2 maximum D By compressed air 3.5 kg/cm2 maximum No flexible wiring or electric tools are allowed to be used outside the engine room on tankers A powered tool is therefore to be driven by air or water The air pressure is the ship's working air of 8.5 kg/cm2 maximum For what are RECOIL-LESS HAMMERS used ? No 12 > A To assemble tight fitting parts B To chisel deep grooves in metal C To hammer on ring spanners D To test the foundation bolts of engines They are used in the assembly of tight fitting machinery or motor parts, e.g to fit the end covers of an electric motor in place or to fit a tight sleeve on a shaft etc They are usually lead shot hammers, their weight ensuring that there is no What kind of tool is shown top left and for what is it used ? No 13 > A A ratchet spanner / Used on main engine piston crowns B A torque spanner / Used on foundation bolts C A forged torque spanner / Used to hammer nuts D A forged ring spanner / Used to be hammered by a sledgehammer What is the tool shown upper right ? No 14 > This is a forged ring spanner, intended for heavy duty, for hammering nuts loose or fast by using a sledgehammer or heavy hammer for smaller size nuts A A bearing cap-wrench B A purifier assembly wrench C An orifice removal wrench D A hydrant wrench This is a hydrant wrench The pin is inserted in the round slot of the hydrant cap or in the round slot of ANY retaining cap and torque applied to open or to close as required Used on hydrants, purifiers, telescopic piping etc They come in What tool is shown bottom left and for what is it used ? No 15 > A Articulated socket wrench/ Out of centre extension B Square ratchet wrench / 45 degree out of line wrench C Flexible socket spanner / For sunken nuts removal and fitting D Flexible ratchet wrench / As extension for ratchets This is the flexible out of centre handle of an articulated socket wrench What kind of tool is shown right bottom and into what does it fit ? No 16 > A A bar wrench / It fits into exhaust gas pipe fastening bolts B An angle wrench / It fits into cylinder cover plugs C A socket bolt wrench / It fits into Allen Bolts (Allen keys) D A torque wrench / It fits over nuts This is a socket bolt wrench or also called an "ALLEN" key It fits into the heads of "ALLEN" bolts What kind of wrench is shown upper left ? No 17 > A An adjustable spanner B A spring wrench C A Stillwell adjustable wrench D A Stilson wrench This is a STILSON wrench used to clamp and fasten on round or worn surfaces It finds its grip and is self locking but leaves marks on the surface Not to be used on nuts in good condition What kind of tool is shown upper right ? No 18 > A A Stilson wrench B A pipe wrench C An adjustable nut wrench D An adjustable vice grip wrench This is an adjustable vice grip wrench Used on piping or worn nuts etc The force applied to the surface by the claw is not in proportion to the torque applied as is the case with the Stilson wrench What is the tool shown bottom left ? No 19 > A A ratchet spanner B A flexible ring spanner C A forged flexible star-spanner D A torque ring spanner This is a ratchet spanner The ring is fitted inside a ratchet ring It comes in various sizes (Spanner sizes are not interchangeable) What kind of tool is shown top right ? No 20 > A A star spanner, double forged B A mechanic's spanner C A common bolt spanner, double forged D A double ended open jaw spanner This is a double ended ring spanner preferably used on all easily access able nuts What is the tool shown top left ? No 21 > A A flat mechanic's double spanner B A double ended ring spanner C A double flat spanner D A forked double spanner This is a double ended open spanner, used where no space exists to use a ring spanner or where a ring spanner cannot be lifted over the nut or nipple What kind of tool is shown bottom left ? How can it be extended ? No 22 > A A star spanner / Extended by torque bar B An open spanner / Cannot be extended C A double hexagon spanner / Extended by rod D A single ended ring spanner / Extended by a pipe or tube Tools6a.BMP An additional torque can be applied on this spanner by sliding a pipe over it to obtain extra leverage What kind of tool is shown bottom right bottom ? No 23 > A A combined open ended spanner and socket wrench B A flat ratchet spanner C A socket wrench forked spanner D A single ended forked ratchet wrench This is a combination spanner On one side is the spanner open ended, on the other side is it a socket wrench of the same size What kind of assembly does the upper left piece and the upper centre piece make ? No 24 > A A socket wrench assembly B A ratchet spanner C A ratchet lever assembly D A ratchet torque assembly The socket wrench consists of the socket and the lever as shown What kind of tool is shown on the bottom left corner of the picture and when is it used ? No 25 > A A rod spanner / For cylinder cover tightening B An extended spanner / When the nut is found frozen C A hexagon fork spanner / To apply extra force when tightening D A pinchbar spanner / When there is no side space available The pinch bar spanner is used when there is no space available on the side or around the nut where a conventional spanner cannot be used What kind of tool is shown bottom centre ? No 26 > A An adjustable pocket spanner B A pipe wrench C A shifting spanner D A Stilson wrench This tool is a vice grip wrench Force applied to the nut is not in proportion to the torque applied on the nut when loosening or tightening On what equipment should the wrench shown bottom right be used ? No 27 > A On bolts and nuts B On broken studs C On large diameter pipes and shafts D On electric motor couplings A chain wrench is used to grip on the circumference of piping and rods, or other components that are circular The tools shown here are ? No 28 > A engineer's tools B electrician's tools C duty engineer's and watchkeeper's control room tools D welder's tools These are insulated handgrip tools and therefore Electrician's tools The bolt and wire cutter shown on the bottom right of the drawing is standard outfit for your domestic home maintenance electrician, but is seldom What is the tool shown top left called and by whom is it mostly used ? No 29 > A Welding rod pliers / fitters and welders B Manometer curved pliers / engineers C Instrument long nose pliers / Automation and control engineers D Curved long nose pliers / Electricians The name indicates what is actually seen A curved long nose pliers is for general use and not used by anybody specifically, however the long nose pliers shown in the picture have INSULATED hand grips, indicating that it is an What is the tool shown top right and by whom is it used ? No 30 > A Combination pliers / For general use B Electrician's pliers / By the electrician C Mechanical pliers / By the engineers and fitters D Flat nose pliers / By the electrician As shown these pliers have flat noses and are called flat nose pliers It is a tool for general use However, the picture shows that the pliers have insulated handgrips and therefore it is an ELECTRICIAN'S tool Most pliers of this type not No 1726 > A Never B For removing sharp edges C To improve the finish D Producing chamfers No 1727 > Which of the following could be carried out in the shaping machine? A External shaft keyway B Internal keyway C Reducing shaft diameters D Cutting a 'T' slot No 1728 > When is it permissible to use a hand file on a lathe? Which of these requires the lowest cutting speed? A Stainless steel B Low carbon steel C Aluminium D Brass No 1729 > A Cutting head B Tool post C Arbour D Cutting shaft No 1730 > Vibration testing is an integral part of what type of maintenance? A Breakdown maintenance B Planned maintenance C Condition monitoring D Intrinsic surveillance No 1731 > What is the name of the tool-mounting shaft on a horizontal milling machine? How is the shaping machine head slide checked to be square to the table? A Dial gauge against the table B Engineers square on the table C Dial gauge against the head slide D Dial gauge attached to the tool post No 1732 > A By using a cutting fluid B By using a very slow speed C Using a slipping clutch chuck D By advancing the tap very slowly No 1733 > When could a magnetic chuck be used on a centre lathe? A Never B When facing C When setting up the work piece D When using the lathe for drilling No 1734 > When tapping holes on the radial drill, how is the tap prevented from breaking? At what temperatures would a pyrometer be used? A In excess of 500°C B In excess of 400°C C In excess of 200°C D In excess of 100°C No 1735 > A Ease of replacing the tubes B Allow for expansion of the tubes C To simplify assembly D Tubes can easily be repacked if leaking No 1736 > What is a Grub Screw used for? A Fastening flanges B Securing split cams C Securing components to a shaft D Clamping machined parts No 1737 > Why is one tube end a packed gland in tube coolers? How is the surface gauge secured to the bed of a centre lathe? A Bolted down B Not secured C Magnetic base D Flat base to sit on the bed No 1738 > A Morse taper B Parallel shank and collet C Left hand screw thread D Adjustable jaws No 1739 > How is an angled face cut on the shaper? A Setting head angle B Altering stroke position C Setting tool angle D Setting table angle No 1740 > How is an end mill secured in the chuck? On the centre lathe what is a collet chuck most suitable for? A Gripping large diameters B Gripping uneven surfaces C Gripping non-symmetrical work pieces D Gripping small diameters No 1741 > A 33° B 36° C 24° D 27° No 1742 > When using a straight tool on the shaping machine what effect does tool deflection have? A No effect B Decreases cut depth C Decreases tool clearance angle D Increases depth of cut No 1743 > What top rake angle would be used for turning Mild steel? What adjusts the stroke length on a shaping machine? A Locking handle B Ram lead screw C Block slide D Table slide No 1744 > A When carrying out facing operations B When boring an irregular shaped work piece C Cylindrical turning an irregular shaped work piece D Carrying out most operations on an irregular shaped work piece No 1745 > Which of the following would a simple dividing head be used for when using a milling machine? A Cutting a gear wheel B Cutting threads C Cutting a single keyway D Cutting a flat on a shaft No 1746 > When would a faceplate be used on a centre lathe? What is the most suitable tool for machining cast iron? A Carbon steel B High-speed steel C Ceramic tip tool D Carbide tip tool No 1747 > A When turning a long work piece B When taking large roughing cuts C When turning a long taper with the tailstock offset D When a fine finish is required No 1748 > Which of these is NOT a positive locking device? A Spring washer B Castellated nut and split pin C Tab washer D Locking wire No 1749 > On a centre lathe when must turning between centres be employed? When change gears are fitted to the back of the centre lathe headstock what are these for? A Changing the chuck speed B Changing the tool feed rate C When thread cutting D Change the speed of the lead screw No 1750 > A Cylindrical grinding machine B Vertical boring machine C Radial drilling machine D Vertical milling machine No 1751 > Which machine would be used to cut a blind keyway in a shaft? A Vertical milling machine B Horizontal milling machine C Centre lathe D Shaping machine No 1752 > Which machine tool would be used to finish machine crankpins? Which is the correct method for removing intact engineers studs? A Stud box B Drill and use stud remover C Pipe wrench D Self grip wrench No 1753 > A 143 teeth B 117 teeth C 127 teeth D 254 teeth No 1754 > What is meant by a 6" Centre Lathe? A 6" between centres B 6" diameter chuck C 6" swing for the work piece D 6" from bed to centre No 1755 > If cutting a mm thread on a non-metric centre lathe what gear wheel is required? What is the purpose of the clapper box on a shaping machine? A To relieve the tool cutting edge on the return stroke B To securely hold the tool C To adjust tool position D To angle tool position No 1756 > A Horizontal milling machine B Vertical milling machine C Vertical boring machine D Centre lathe No 1757 > What jointing material is used on engine exhausts or superheated steam lines? A Solid copper joints B General purpose asbestos joints C Wire reinforced asbestos joints D Preformed neoprene joints No 1758 > Which machine tool would be used to cut straight gears? If a leak is suspected in a tube heat exchanger what should be checked first? A Tube plates for cracking B Tightness of packed tube end C Tubes for damage D Fixed tube end for security in tube plate No 1759 > A Mount the work piece at an angle using horizontal arbour B Using an end mill and setting the head at the appropriate angle C Using an end mill with the work mounted at an angle D Using a specially shaped cutter No 1760 > How is the radius put on thread crests? A Grinding the threading tool to the correct shape B Using a hand-chasing tool C Using a hand file D Using a separate, correctly ground tool No 1761 > How would a "V" slot best be cut on a Universal milling machine? Which machine tool would be used to drill and tap an irregular casting? A Centre lathe B Radial arm drilling machine C Boring machine D Shaping machine No 1762 > A To avoid catching on the tool post B To avoid medallions getting caught on the work piece C To prevent swarf chips flying inside the overall D All of these options No 1763 > What effect has setting the tool too high on a centre lathe? A Increased front clearance B Reduced top rake angle C Reduced front clearance angle D Increased relief angle No 1764 > Why must a close fitting, buttoned up overall be worn when using a lathe? What method does a Pneumercator gauge use? A Compressed air B Capacitor C Diaphragm D Pressure transducer No 1765 > A Vertical milling machine B Horizontal milling machine C Centre lathe D Boring machine No 1766 > Why is the centre lathe the most popular onboard machine tool? A Easy to install B Easy to operate C Easy to maintain D Most versatile No 1767 > Which machine tool would be used to cut male threads? How can vice jaws be checked for parallel on a shaping machine? A Dial gauge attached to tool post B Engineer's square on the table C Engineer's square against the head slide D Engineer's square against the vertical table slide No 1768 > A Small clearance angle B Too large clearance angle C Unequal length edges D Unequal drill point angle No 1769 > What is the main safety consideration when using the shaper? A Removal of the stroke-adjusting handle B Projection of the ram slide behind the machine C Flying swarf chips D Dislodging work piece No 1770 > When drilling what could account for an enlarged hole diameter? When using a parting tool in the centre lathe what prevents it from binding? A Increasing front clearance B Providing side and body clearance C Tool slightly angled to work piece D Increasing top rake angle