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c8
179問 • 1年前
  • Jeo Clyde Arizo
    • 通報

    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 having a mushroom head?

    Removed 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 is known as a welding done with a shielded or unshielded carbon or metal electrode

    Arc welding

  • 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

    Which material can be drilled at the highest speed?

    Aluminum

  • 51

    For greater accuracy, some micrometers have a vernier scale making it possible to read in increments 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 the 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 off am 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 repair?

    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

    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 having a mushroom head?

    Removed 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 is known as a welding done with a shielded or unshielded carbon or metal electrode

    Arc welding

  • 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

    Which material can be drilled at the highest speed?

    Aluminum

  • 51

    For greater accuracy, some micrometers have a vernier scale making it possible to read in increments 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 the 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 off am 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 repair?

    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

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

    deburred with a pipe reamer