Competence 8

181問 • 2ヶ月前

問題一覧

1. When drilling blind holes with standard drill press, the proper method of stopping the progress of the drill boring through the work is by_

•using a depth stop

2. What is the end of shaft condition before the maintenance repair is carried out?

•chamfered

3. Why should two pipe joints be properly aligned before being connected?

•Misalignment of the joints will result to excessive strain.

4. What precaution should be followed when using a chisel having a mushroom head?

•Removed the ragged edges by grinding

5. The blade for a power hacksaw should be installed with the teeth:

•pointing toward the motor end of the machine

6. Which of the following types of files would produce a fine finish when draw filing?

•Mill cut

7. Which of the following hand taps are recommended in cutting internal threads on a blind hole?

•Pilot and Intermediate

8. Which of the followwing indicator is used to determine the hardness of a grease?

•Penetration number

9. Knowing the construction and the operating action of the milling machine will lessen the chance of the machine from being

•damaged serously.

10. Diesel engine piston ring ends can be machined in different shapes. The step-cut ring end offers the advantage of:

•a decreased possibility of ring seizure

11. Hacksaw cutting is more effective when pressure is applied on the ?

•foreward stroke

12. A follower rest should make use of a lathe to machine.

•threads on long slender shafts

13. Which of the files listed is commonly referred to as a "rat-tail"file?

•Small round

14. When drilling hole in a piece of work chuked in a lathe you should mount the drill chunk in the_

•tailstock

15. What should you do when using a chisel with a mushroom head?

•Remove the ragged edges by grinding.

16. What is the theoretical lift of a pump handling fresh water at atmospheric pressure?

•10.35 m

17. The lower water seal on a diesel engine wet cylinder liner must allow for liner expansion and contraction. This seal is most commonly a

•neoprene o-ring

18. What is the complete process when copper plates are used for making gaskets that is usually annealed by heating red cherry color?

•Cooling slowly in air

19. What is this kind of metal which is light, strong and corrosion -resistant used as the plate material in plate-type heat exchanger ?

•titanium

20. Which of the files listed will have coarsely spaced teeth?

•Bastard cut

21. How do you call a welding process with the work in the positive pole and the electrode in the negative pole?

•Straight polarity welding circuit

22. When the timing gear backlash for a Roots-type blower has become excessive, the problem is properly repaired by.

•renewing both driving and driven gears as a set

23. Which features of a centrifugal pump reduce the need for renewing worn impellers and pump casings?

•Replaceable impeller and casing wearing rings

24. What hand tool is commonly used in drilling, reaming, hand tapping, and die threading processes?

•Vise grip

25. What type of tooth set on a hacksaw blade where every third tooth remains straight, while the other two are alternately set?

•Rake

26. What operation is used in smoothing and squaring the surface of a round hole ?

•counterboring operation

27. How do you make it easier for a hand hacksaw to cut a work piece?

•it will dig into the work piece and tend to whirl around

28. What is the primary used of a soft faced hammer or mallet?

•For striking a surface without causing damage

29. When repacking a stuffing box fitted with a lantern ring, which of the following precautions should be observed?

•Replace all the packing rings

30. A micrometer screw has a pitch of?

•50 thread per inch

31. When using centre lathe, why should you short sleeves or close fitting sleeves be worn?

•to prevent sleeves being caught up on work piece or chuck

32. Before using an all-purpose electric measuring instrument (multimeter) utilizing internal batteries to supply power for resistance measurements, you should first

•select the proper resistance range,

33. A centrifugal pump vibrates excessively during operation, Upon dissasembling the pump it is found that the impeller is out of balance. Without an available spare, you should

•remove metal from the heavy side by machining in a lathe

34. What metal is used as an alloying material in the manufacture of varius special steels ?

•vanadium

35. The term refering to the number of teeth per inch on a hacksaw blade is known as the ?

•pitch

36. After removing an old set of of rings, which of the following conditions is indicated if a bright spot is found on each end of a broken piston ring?

•insufficient gap clearance

37. Stainless steel is an alloy composed mainly of ?

•chronium and steel

38. What size circular bar is required to make a hexagonal nut of 16mm sides along the:

•16 mm

39. What is the ultimate stress of mild steel used in boiler plates?

•30 tons/sq.m

40. What is the purpose of annealing the steel?

•to make it softerr

41. This method is used for joining sheet metal and for attaching studs, rods and busses, etc. to plates.

•Resistance welding

42. Monel metal is an alloy composed mainly of ?

•nickel and copper

43. When replacing packing rings in the stuffing boxes of reciprocating pump piston rods, the ends of the rings should be cut ?

•square

44. Which of the listed numeric values represents the smallest size drill?

•#80

45. Temporary repairs to an open DC propulsion armature coilcan be made by .

•disconnecting coil ends, insulating each, and short circuiting the two commutator bars

46. Which of the following spanners is preferable to use?

•Ring

47. Babbit metal is used to make ?

•bearing surfaces

48. Accidental ground in a shipboard electrical system must be repaired as soon as possible as they will

•damage insulation and may cause severe severe outages

49. In measuring the clearances between the main engine bearings and the crankshaft, which of these materials is commonly applied?

•Plasti-gauge

50. What is the workpiece motion and tool motion respectively in a horizontal boring machine?

•Stationary and rotational with translation

51. For greater accuracy, some micrometers have a vernier scale making it possible to read in incriments of ?

•ten thousands of an inch

52. The dead center of a lathe can be used only after the end of the work piece.How does the lathe hold the workpiece ?

•center drill

53. For safety of the piping systems, what characteristic of gasket is most advisable to use?

•Can withstand fluid temperature and chemically stable with the fluid used

54. Which one of the following files types are always Mill files?

•single cut

55. To prevent vibration damage to the fuel supply line of a diesel engine, you may use:

•a length of approved flexible nonmetallic hose

56. When steel, cast iron, or other metals with surface scale are being turned, what roughing cut should be taken first?

•Get under the scale deep enough.

57. As per regulations permit to repairs the boiler safety valves while installed on a main propulsion boiler and may be made by.

•the chief engineer in an emergency

58. Pipe threads are made of what tools are you use?

•File a nick where the cut is to be sterted

59. Which of the following metal material has the lowest cutting speed for an effective rough cutting operation if a high-speed cutter is to be used in the modern milling machine onboard?

•carbon steel

60. Copper gaskets are usually annealed by heating to red hot cherry and should be ?

•cooled slowly in air

61. If a centrifugal pumps delivers insufficient discharge pressure due to worn wear rings, what corrective action is called for?

•Replace the rings

62. Tapping threads into a blind hole should be finished by using a:

•bottoming tap

63. Which of the following process of annealing copper plates that are used for gaskets?

•By Heating cherry red hot and cooling slowly in air

64. A side from welding, the best material to use in bonding pipes carrying low temperature liquids or fluids is

•epoxy resin

65. Which compound gauge measures pressure indicated on both high and low on outside pressure?

•Atmospheric pressure,

66. What is the cause of a bluish smoke observed in the exhaust of an operating diesel engine?

•A scored cylinder liner

67. What is the primary use of a soft-faced hammer or mallet?

•For striking a surface without causing damage

68. How would you checked the alignment of coupling faces ?

•inserting a feeler gage to different points of the coupling,

69. Which drill size would you use to machine and tap a 3/4 -10 National Coarse internal thread?

•21/32 inches

70. Which of the following characteristics is true relative to meshing with corrosion protection oils, as the resultant mixture ?

•the gear of largeer diameter will rotate at a slower RPM

71. Which of the following metal material has the lowest cutting speed for an effective rough cutting operation if a high-speed cutter is to be used in the modern milling machine onboard ?

•Carbon steel

72. When it necessary to open a refrigeration system for repairs and the system will be open for more than a few minutes, the open ends of the system should be

•plugged

73. What safety precautions should be done changing the spindle speeds on a lathe machine?

•Stop the lathe operation

74. If a drill press is used to completely bore through a metal plate, feed pressure on the drill bit should be eased as the bit braks through the bottom of the hole to prevent

•the drill bit from jamming and spinning the workpiece

75. Small leaks in gaskets should be stopped immediately after installation because

•the leak will probably worsen in time

76. Which one of the following chisels should be used for cutting oil grooves?

•Round nose

77. Packing rings installed on auxiliary turbines are lubricated by

•moisture in the turbine steam

78. The number of screw threads per inch for a Standard National Coarse 1/2 inch bolt is:

•13

79. Which of the following kind of metal is ductile and maleable that can be ccorroded by air or water ?

•aluminum

80. Used to reduce cargo pump leakage to the pump room bilge of a tanker ship is the

•Mechanical Seals

81. Sealing lines provide sealing liquid flow to the stuffing box of a centrifugal pump.

•to cool the shaft

82. The loop seal connected to the main condenser returns the drains from the

•intercondenser

83. A diesel engine fails to start due to excessive water in the fuel. Which items on the list where the water should removed before the engine can be started ?

•fuel lines

84. To repair or replace defective diesel engine high pressure fuel pipe it must be of the same length and diameter as the original piping.

•maintain specified injection characteristics

85. Which of the files listed can be used for sharpening a tool?

•A single cut file.

86. Which of the fittings should be used for installation of piping to permit removal of the pump for servicing?

•Union

87. The best method of fixing a winch motor bearing of the sealed type tha is running hot is to

•replace the bearing with a new one

88. The gasket and the broken studs have been replaced on a tank manhole cover. Which of the following methods is satisfactory for testing the repai?

•Host test the repaired area with a minimum of 100 psig water pressure?

89. Gland sealing steam is used during steam turbine operation to prevent the loss of

•vacuum

90. If the capacity of a centrifugal pump decreases gradually over a long period of time, you should replace the

•wearing rings

91. What is the end of shaft condition before the maintenance repair is carried out?

•Chamfered

92. What machine which can flatter surface on horizontal, vertical or angular plane?

•shaper machine

93. To prevent overheating and scoring of the shaft after repacking the stuffing box, which of the following procedures should be carried out ?

•Tighten the packing in small increments while the pump is operating

94. When renewing sections of pipe in a hydraulic system, it should always indicate the nominal pipe size of the piping?

•size for threaded connections

95. To repair a small electrical motor that has been submerged in salt water, you should,

•Wash it with fresh water and apply an externalsource of heat

96. What saw is more suitable for cutting metal in tight quarters ?

•Stab saw

97. Which of the listed tools should be used to remove a tapered roller bearing from a shaft?

•An arbor press

98. What kind of non-metallic mineral material which can withstand very high temperature and unaffected by steam petrol, paraffin, fuel, oil and lubricants?

•Asbestos

99. Which of the following sensing device in a pressure gauge using the Bourdon principle?

•Metal tube

100

100. After using a pipe cutter to cut a piece of pipe, the inside edge of the pipe should be

•deburred with a pipe reamer

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問題一覧

1. When drilling blind holes with standard drill press, the proper method of stopping the progress of the drill boring through the work is by_

•using a depth stop

2. What is the end of shaft condition before the maintenance repair is carried out?

•chamfered

3. Why should two pipe joints be properly aligned before being connected?

•Misalignment of the joints will result to excessive strain.

4. What precaution should be followed when using a chisel having a mushroom head?

•Removed the ragged edges by grinding

5. The blade for a power hacksaw should be installed with the teeth:

•pointing toward the motor end of the machine

6. Which of the following types of files would produce a fine finish when draw filing?

•Mill cut

7. Which of the following hand taps are recommended in cutting internal threads on a blind hole?

•Pilot and Intermediate

8. Which of the followwing indicator is used to determine the hardness of a grease?

•Penetration number

9. Knowing the construction and the operating action of the milling machine will lessen the chance of the machine from being

•damaged serously.

10. Diesel engine piston ring ends can be machined in different shapes. The step-cut ring end offers the advantage of:

•a decreased possibility of ring seizure

11. Hacksaw cutting is more effective when pressure is applied on the ?

•foreward stroke

12. A follower rest should make use of a lathe to machine.

•threads on long slender shafts

13. Which of the files listed is commonly referred to as a "rat-tail"file?

•Small round

14. When drilling hole in a piece of work chuked in a lathe you should mount the drill chunk in the_

•tailstock

15. What should you do when using a chisel with a mushroom head?

•Remove the ragged edges by grinding.

16. What is the theoretical lift of a pump handling fresh water at atmospheric pressure?

•10.35 m

17. The lower water seal on a diesel engine wet cylinder liner must allow for liner expansion and contraction. This seal is most commonly a

•neoprene o-ring

18. What is the complete process when copper plates are used for making gaskets that is usually annealed by heating red cherry color?

•Cooling slowly in air

19. What is this kind of metal which is light, strong and corrosion -resistant used as the plate material in plate-type heat exchanger ?

•titanium

20. Which of the files listed will have coarsely spaced teeth?

•Bastard cut

21. How do you call a welding process with the work in the positive pole and the electrode in the negative pole?

•Straight polarity welding circuit

22. When the timing gear backlash for a Roots-type blower has become excessive, the problem is properly repaired by.

•renewing both driving and driven gears as a set

23. Which features of a centrifugal pump reduce the need for renewing worn impellers and pump casings?

•Replaceable impeller and casing wearing rings

24. What hand tool is commonly used in drilling, reaming, hand tapping, and die threading processes?

•Vise grip

25. What type of tooth set on a hacksaw blade where every third tooth remains straight, while the other two are alternately set?

•Rake

26. What operation is used in smoothing and squaring the surface of a round hole ?

•counterboring operation

27. How do you make it easier for a hand hacksaw to cut a work piece?

•it will dig into the work piece and tend to whirl around

28. What is the primary used of a soft faced hammer or mallet?

•For striking a surface without causing damage

29. When repacking a stuffing box fitted with a lantern ring, which of the following precautions should be observed?

•Replace all the packing rings

30. A micrometer screw has a pitch of?

•50 thread per inch

31. When using centre lathe, why should you short sleeves or close fitting sleeves be worn?

•to prevent sleeves being caught up on work piece or chuck

32. Before using an all-purpose electric measuring instrument (multimeter) utilizing internal batteries to supply power for resistance measurements, you should first

•select the proper resistance range,

33. A centrifugal pump vibrates excessively during operation, Upon dissasembling the pump it is found that the impeller is out of balance. Without an available spare, you should

•remove metal from the heavy side by machining in a lathe

34. What metal is used as an alloying material in the manufacture of varius special steels ?

•vanadium

35. The term refering to the number of teeth per inch on a hacksaw blade is known as the ?

•pitch

36. After removing an old set of of rings, which of the following conditions is indicated if a bright spot is found on each end of a broken piston ring?

•insufficient gap clearance

37. Stainless steel is an alloy composed mainly of ?

•chronium and steel

38. What size circular bar is required to make a hexagonal nut of 16mm sides along the:

•16 mm

39. What is the ultimate stress of mild steel used in boiler plates?

•30 tons/sq.m

40. What is the purpose of annealing the steel?

•to make it softerr

41. This method is used for joining sheet metal and for attaching studs, rods and busses, etc. to plates.

•Resistance welding

42. Monel metal is an alloy composed mainly of ?

•nickel and copper

43. When replacing packing rings in the stuffing boxes of reciprocating pump piston rods, the ends of the rings should be cut ?

•square

44. Which of the listed numeric values represents the smallest size drill?

•#80

45. Temporary repairs to an open DC propulsion armature coilcan be made by .

•disconnecting coil ends, insulating each, and short circuiting the two commutator bars

46. Which of the following spanners is preferable to use?

•Ring

47. Babbit metal is used to make ?

•bearing surfaces

48. Accidental ground in a shipboard electrical system must be repaired as soon as possible as they will

•damage insulation and may cause severe severe outages

49. In measuring the clearances between the main engine bearings and the crankshaft, which of these materials is commonly applied?

•Plasti-gauge

50. What is the workpiece motion and tool motion respectively in a horizontal boring machine?

•Stationary and rotational with translation

51. For greater accuracy, some micrometers have a vernier scale making it possible to read in incriments of ?

•ten thousands of an inch

52. The dead center of a lathe can be used only after the end of the work piece.How does the lathe hold the workpiece ?

•center drill

53. For safety of the piping systems, what characteristic of gasket is most advisable to use?

•Can withstand fluid temperature and chemically stable with the fluid used

54. Which one of the following files types are always Mill files?

•single cut

55. To prevent vibration damage to the fuel supply line of a diesel engine, you may use:

•a length of approved flexible nonmetallic hose

56. When steel, cast iron, or other metals with surface scale are being turned, what roughing cut should be taken first?

•Get under the scale deep enough.

57. As per regulations permit to repairs the boiler safety valves while installed on a main propulsion boiler and may be made by.

•the chief engineer in an emergency

58. Pipe threads are made of what tools are you use?

•File a nick where the cut is to be sterted

59. Which of the following metal material has the lowest cutting speed for an effective rough cutting operation if a high-speed cutter is to be used in the modern milling machine onboard?

•carbon steel

60. Copper gaskets are usually annealed by heating to red hot cherry and should be ?

•cooled slowly in air

61. If a centrifugal pumps delivers insufficient discharge pressure due to worn wear rings, what corrective action is called for?

•Replace the rings

62. Tapping threads into a blind hole should be finished by using a:

•bottoming tap

63. Which of the following process of annealing copper plates that are used for gaskets?

•By Heating cherry red hot and cooling slowly in air

64. A side from welding, the best material to use in bonding pipes carrying low temperature liquids or fluids is

•epoxy resin

65. Which compound gauge measures pressure indicated on both high and low on outside pressure?

•Atmospheric pressure,

66. What is the cause of a bluish smoke observed in the exhaust of an operating diesel engine?

•A scored cylinder liner

67. What is the primary use of a soft-faced hammer or mallet?

•For striking a surface without causing damage

68. How would you checked the alignment of coupling faces ?

•inserting a feeler gage to different points of the coupling,

69. Which drill size would you use to machine and tap a 3/4 -10 National Coarse internal thread?

•21/32 inches

70. Which of the following characteristics is true relative to meshing with corrosion protection oils, as the resultant mixture ?

•the gear of largeer diameter will rotate at a slower RPM

71. Which of the following metal material has the lowest cutting speed for an effective rough cutting operation if a high-speed cutter is to be used in the modern milling machine onboard ?

•Carbon steel

72. When it necessary to open a refrigeration system for repairs and the system will be open for more than a few minutes, the open ends of the system should be

•plugged

73. What safety precautions should be done changing the spindle speeds on a lathe machine?

•Stop the lathe operation

74. If a drill press is used to completely bore through a metal plate, feed pressure on the drill bit should be eased as the bit braks through the bottom of the hole to prevent

•the drill bit from jamming and spinning the workpiece

75. Small leaks in gaskets should be stopped immediately after installation because

•the leak will probably worsen in time

76. Which one of the following chisels should be used for cutting oil grooves?

•Round nose

77. Packing rings installed on auxiliary turbines are lubricated by

•moisture in the turbine steam

78. The number of screw threads per inch for a Standard National Coarse 1/2 inch bolt is:

•13

79. Which of the following kind of metal is ductile and maleable that can be ccorroded by air or water ?

•aluminum

80. Used to reduce cargo pump leakage to the pump room bilge of a tanker ship is the

•Mechanical Seals

81. Sealing lines provide sealing liquid flow to the stuffing box of a centrifugal pump.

•to cool the shaft

82. The loop seal connected to the main condenser returns the drains from the

•intercondenser

83. A diesel engine fails to start due to excessive water in the fuel. Which items on the list where the water should removed before the engine can be started ?

•fuel lines

84. To repair or replace defective diesel engine high pressure fuel pipe it must be of the same length and diameter as the original piping.

•maintain specified injection characteristics

85. Which of the files listed can be used for sharpening a tool?

•A single cut file.

86. Which of the fittings should be used for installation of piping to permit removal of the pump for servicing?

•Union

87. The best method of fixing a winch motor bearing of the sealed type tha is running hot is to

•replace the bearing with a new one

88. The gasket and the broken studs have been replaced on a tank manhole cover. Which of the following methods is satisfactory for testing the repai?

•Host test the repaired area with a minimum of 100 psig water pressure?

89. Gland sealing steam is used during steam turbine operation to prevent the loss of

•vacuum

90. If the capacity of a centrifugal pump decreases gradually over a long period of time, you should replace the

•wearing rings

91. What is the end of shaft condition before the maintenance repair is carried out?

•Chamfered

92. What machine which can flatter surface on horizontal, vertical or angular plane?

•shaper machine

93. To prevent overheating and scoring of the shaft after repacking the stuffing box, which of the following procedures should be carried out ?

•Tighten the packing in small increments while the pump is operating

94. When renewing sections of pipe in a hydraulic system, it should always indicate the nominal pipe size of the piping?

•size for threaded connections

95. To repair a small electrical motor that has been submerged in salt water, you should,

•Wash it with fresh water and apply an externalsource of heat

96. What saw is more suitable for cutting metal in tight quarters ?

•Stab saw

97. Which of the listed tools should be used to remove a tapered roller bearing from a shaft?

•An arbor press

98. What kind of non-metallic mineral material which can withstand very high temperature and unaffected by steam petrol, paraffin, fuel, oil and lubricants?

•Asbestos

99. Which of the following sensing device in a pressure gauge using the Bourdon principle?

•Metal tube

100

100. After using a pipe cutter to cut a piece of pipe, the inside edge of the pipe should be

•deburred with a pipe reamer