Deck 9: Metal Cleaning, Abrasives, and Machining Techniques

Question 1

Which of the following is an accessory for lathe machine?

A)Lead screw
B)Cone pulley
C)Tool post
D)Coolant pump
E)None of the above

Answer 1

Coolant pump

Question 2

Loams sand generally has

A)50% clay and 18% moisture
B)60% clay and 30% moisture
C)34% clay and 5% moisture
D)70% clay and 30% moisture
E)40% clay and 10% moisture

Answer 2

50% clay and 18% moisture

Question 3

Straight shears are used for

A)Straight line cutting of sheets
B)Making circular cuts
C)Parting off
D)Making irregular cuts

Answer 3

Straight line cutting of sheets

Question 4

Duration which operation on a lathe machine, the spindle speed is usually the least?

A)Finish turning
B)Drilling
C)Parting off
D)Rough turning
E)Knurling

Question 5

Music wire

A)Is a standard wire for gauge determination
B)Is a resistance wire used in instruments
C)Is fine wire used in musical instruments manufacture springs
D)None of above
E)Is a carbon steel wire used to manufacture springs

Question 6

In abrasive jet machining the achievable tolerances are nearly

A)500
B)1
C)0.1
D)250
E)50

Question 7

A knee is a part of

A)Lathe
B)Jig boring machine
C)Milling machine
D)Breaching machine
E)Shaper

Question 8

The operation of cutting multiple holes is called

A)perforating
B)Parting off
C)notching
D)trimming
E)lancing

Question 9

Gear made by sand casting are used in

A)Automobiles
B)Toys
C)Diesel locomotives
D)Concrete mixers
E)Machine tools

Question 10

A bench vice is used for

A)Filing the job
B)Tapping the job
C)Clamping the job
D)Parting off

Question 11

Broaching is primarily done for

A)mass production
B)hard materials
C)better finish
D)cylindrical jobs
E)Parting off

Question 12

For simple turning operation of lathe, the cutting speed is specified as 70 metres per minute. The cutting tool may be expected to be

A)Carbide
B)Higher speed steel
C)Carbon steel
D)Mild steel
E)Diamond

Question 13

Simple indexing using a dividing head of turn ratio 40 for 6 division would be

A)14 holes in 21 hole circle plate
B)26 holes in 21 hole circle plate
C)6 turns and holes in 21 hole circle plate
D)6 turns and 14 holes in 30 hole circle plate
E)6 turns

Question 14

In instrumentation, registering is

A)Production of continuous record on an instrument
B)Conversion of signal from one form to another
C)Indication by numbers or some other symbol of discrete increments, the value of some quantity
D)To perform various manipulations before indicating or recording results
E)None of the above

Question 15

In a drilling machine having six spindle speeds if first five speeds are 458, 605, 800, 1055 and 1390 rpm, the next higher speed would be

A)1760 rpm
B)1500 rpm
C)1830 rpm
D)1630 rpm
E)1440 rpm

Question 16

A pattern maker's contraction rule accounts for

A)All materials of the pattern
B)All materials to be cast
C)Only shrinkage allowance
D)Only shrinkage, draft and distortion allowances
E)All pattern allowances

Question 17

The horizontal force required to slide the tail stock would be

A)1000 kg
B)648.84 kg
C)100 kg
D)148.84 kg
E)500 kg

Question 18

The audible spectrum of sound is in the range of

A)0 to 100 cps
B)30 to 15000 cps
C)15000 to 25000 cps
D)25000 to 10000 cps
E)None of the above

Question 19

Size of a shaper is generally specified by

A)Length, breadth and height of machine
B)Maximum travel of cutting tool
C)Weight of the machine
D)Quick return ratio
E)The area of machined surface per hour

Question 20

Which of the following process is preferred for the welding of grey cast iron?

A)Oxy-acetylene
B)Thermit
C)MIG
D)TIG
E)Submerged arc

Question 21

For mild steel work piece using carbide tool, the temperature at which maximum materials is removed is

A)200°C
B)275°C
C)100°C
D)Near zero deg centigrade
E)Below room temperature

Question 22

The surface speed of regulating wheel in case of centreless grinding is

A)1500 - 1800 M/min
B)15 - 75 M/min
C)1000 - 1500 M/min
D)100 - 500 M/min
E)500 - 800 M/min

Question 23

Which of the following is considered to be non-machinable by conventional processes?

A)Grey cast iron
B)Silicon bronze
C)Parting off
D)While cast iron
E)Cast copper

Question 24

The cemented carbide tools are generally poor in

A)Compression
B)Tension
C)Shear
D)Torsion
E)None of the above

Question 25

Which quality of fit is provided for plummer block bearings?

A)H8F8
B)H6F6
C)H8D8
D)H6G5
E)None of the above

Question 26

All of the following are metal cleaning methods EXCEPT

A)Parting off
B)Phosphatizing
C)Knurling
D)Abrasion blasting
E)Tumbling

Question 27

Which one of the following is a natural abrasive?

A)Alundum
B)Corundum
C)Boron carbide
D)Carborundum
E)None of the above

Question 28

In automatic control systems what could be the source of process disturbances?

A)Changes in supply
B)Changes in demand
C)Changes in environmental and other associated variables
D)Change in set point
E)Any of the above

Question 29

The maximum peripheral speed of a grinding wheel is limited by

A)The work material
B)The diameter of the wheel
C)The frive limitations
D)The size of the work piece
E)The kind of bond used in the wheel

Question 30

Continuous chips

A)Are easily disposable
B)Sintering
C)Cause good surface finish
D)Waste power due to heat generation
E)Do not require cooling

Question 31

Fetling of castings is done to

A)Fill the void by welding
B)Smoothen surfaces
C)Remove the extra material from castings
D)To remove internal stresses from castings
E)To produce uniformly cooled castings.

Question 32

Lathe bed is made of

A)Mild steel
B)Close grain cast iron
C)Cast steel
D)Pig iron
E)Alloy steel

Question 33

In a shrink rule the graduations are

A)Slightly longer than the regular graduations
B)Same as regular graduations
C)Slightly shorter than the regular graduations
D)None of the above

Question 34

The purpose of using a core in moulding is

A)To produce sound casting
B)To permit uniform flow of metal during moulding
C)To enable easy removal of pattern
D)To produce chilled surface
E)To provide desired recesses in casting

Question 35

A micron is

A)0.01 mm
B)0.1 mm
C)1 mm
D)0.0001 mm
E)0.001 mm

Question 36

Investment casting uses pattern made of

A)Clay
B)Wood
C)Metal
D)Plastic
E)Wax

Question 37

Metal patterns are used for

A)Large castings
B)Large scale production of castings
C)Complicated castings
D)Precision castings
E)Small castings

Question 38

In a lathe power feed is generally not available for

A)Lead screw
B)Carriage
C)Cross slide
D)Compound slide
E)All of the above

Question 39

Bellows are

A)Used in foundry for cleaning the casting
B)Used in foundry for blowing loose sand from cavities and surface of the mould
C)Used in foundry for smoothening and cleaning out depression in the mould
D)Used in foundry for repairing the moulds
E)Used in foundry for moistening the mould

Question 40

Which one of the following methods cannot be used for turning internal tapers?

A)Tail stock offset
B)Cross slide
C)Compound slide
D)All of the above
E)None of the above

Question 41

Which of the following is not a chipless machining process?

A)Rolling
B)Grinding
C)Extruding
D)Die casting
E)Cold heading

Question 42

During planning the chips produced are in the form of

A)closed spirals
B)long helics
C)Parting off
D)spinters
E)fragments

Question 43

Choose the incorrect statements. A coolant should be

A)Good lubricant
B)Generally not provided
C)Harmless to operator and machine
D)Transparent
E)Light in weight

Question 44

Which of the following centre is used for holding hollow jobs on a lathe?

A)Oil groove centre
B)Revolving centre
C)Half centre
D)Square centre
E)Pipe centre

Question 45

Which of the following process needs high current for its operation?

A)Electro chemical machining
B)Ultrasonic machining
C)Abrasive machining
D)Electron beam machining
E)Electric discharge machining

Question 46

For short-distance transmission, the methods of transmission that can be used is

A)Hydraulic
B)Pneumatic
C)Electric and electronic
D)Any of the above
E)None of the above

Question 47

In a cupola

A)Wind box and tap hole are at the same level
B)Slag spout is below tape hole
C)Slag spout is above wind box
D)Tape hole is below wind box
E)Tape hole is above wind box

Question 48

How wire anemometers are generally used to

A)Measure thermal conductivity of solids
B)Measure pressure of fluids
C)Measure temperature of moving fluid
D)Measure velocity of air steam
E)Measure magnetic properties

Question 49

In EDM, the erosion of metal occurs due to

A)Eddy current generated on the metal surface
B)Highly ionised electrolyte impinging on the metal surface
C)Chemical erosion
D)Rapidly recurring spark discharges impinging against the surface of work piece
E)Molecular transfer

Question 50

The tool used for punching small indentations/establishing points for divider is termed as

A)Solid punch
B)Parting off
C)Hollow punch
D)Prick punch