Deck 14: Machining Processes, Techniques and Tools

Question 1

Which one of the following is an angle measuring device?

A)Hermaphrodite caliper
B)Divider
C)Sine bar
D)Angle iron
E)Trammel

Answer 1

Sine bar

Question 2

With electronic circuits the accuracy that can be expected from scanners will lie in the range of

A)25 to 50%
B)5 to 10%
C)20 to 25%
D)10 to 17.5%
E)0.1 to 1%

Answer 2

0.1 to 1%

Question 3

Stellite is a non-ferrous cast alloy containing

A)Nickel, cobalt and chromium
B)Tungsten, chromium and cobalt
C)Molybdenum and vanadium
D)Cobalt and manganese
E)Nickel, lead and zinc

Answer 3

Tungsten, chromium and cobalt

Question 4

A strain gauge is a

A)sensor
B)recording device
C)Parting off
D)measuring device
E)comparator

Question 5

Bearing lining

A)Muntz metal
B)Duralumin
C)Babbit
D)Bronze
E)Delta metal

Question 6

The counteract the increased sulphur percentage

A)Carbon is added
B)Manganese is added
C)Phosphorous is added
D)Oxidising agents are added
E)None of the above

Question 7

Standard taper generally used on milling machine spindles is

A)Seller's taper
B)Morse taper
C)Brown and Sharpe taper
D)Chapman taper
E)Jarno and Reed taper

Question 8

C-14 steel indicates plain carbon steel containing carbon percentage

A)14
B)1.4
C)0.14
D)0.1 to 0.8
E)1 to 1.8

Question 9

The bonding of a rubber sheet with a metal is done by

A)Induction welding
B)Melting rubber in metal
C)Welding
D)High frequency dielectric heating
E)Adhesive bonding

Question 10

Permeability of a foundry sand is

A)Capacity to hold moisture
B)The ability of sand to withstand high temperatures
C)Distribution of binder in sand
D)Porosity to permit the escape of gases
E)Fineness of sand

Question 11

Zinc chloride finds application in

A)Soft soldering
B)Post weld cleaning
C)Thermit welding
D)TIG welding
E)Brazing

Question 12

The surface finish obtainable in ultrasonic machining is of the order of

A)500 to 1000
B)0.2 to 0.5
C)200 to 500
D)20 to 50
E)2 to 5

Question 13

In a steel plant the product of a blast furnace is

A)Cast steel
B)Pig iron
C)Ingot
D)Mild steel
E)Cast iron

Question 14

Which of the following process has the highest metal removal rate (mm33/min)

A)Chemical machining
B)Electron beam machining
C)Laser beam machining
D)Ultrasonic machining
E)Abrasive machining

Question 15

The type of grains usually preferred for moulding sand are

A)Cylindrical
B)Hemishperical
C)Cubical
D)Round
E)Sharp irregular shaped

Question 16

A drill will not cut when

A)helix pitch is small
B)lip angle is zero
C)point angle is 118°
D)helix pitch is large
E)Parting off

Question 17

In shell moulding, the dimensional accuracy that can be expected is

A)0.001 to 0.002 mm/mm
B)1 mm/mm
C)0.003 to 0.005 mm/mm
D)0.1 mm to 0.3 mm
E)0.3 mm to 0.5 mm

Question 18

The collapsible tubes for tooth pastes are made by

A)rolling
B)die casting
C)extruding
D)drawing
E)Parting off

Question 19

A standard ground drill for use on mild steel has a point angle of

A)80°
B)118°
C)30°
D)138°
E)60°

Question 20

Ultrasonic machine is best suited for

A)Non-ferrous metal
B)Spongy materials
C)Brittle materials
D)Dielectrics
E)Amorphous solids

Question 21

Which of the following is very hard grade?

A)Parting off
B)A - E
C)G - K
D)T - Z
E)L - O

Question 22

In a machining operation on free cutting mild steel the cutting speed is mentioned as 70 m/min. What should be material of cutting tool

A)Carbon steel
B)Wood
C)High speed steel
D)Carbide
E)Diamond

Question 23

The process of cutting thin gears from metal sheets is known as

A)Extruding
B)Punching
C)Stamping
D)Sintering
E)Rolling

Question 24

A Hack-saw blade cuts on

A)Depends on direction of force
B)Both
C)Forward stroke
D)Return stroke
E)Depends on orientation

Question 25

Buffing is

A)An finishing operation in broaching
B)An etching process
C)The process of bringing out the luster of metal
D)A process of electroplating
E)Covering a metal part with soft materials to prevent damage

Question 26

Which of the following method cannot be used for manufacturifng internal gears?

A)Die casting
B)Broaching
C)Casting
D)Hobbing
E)Stamping

Question 27

Which of the following is an accessory for lathe?

A)Head stock
B)Lead screw
C)Steady rest
D)Tool post
E)Tail stock

Question 28

The size of a lathe is expressed by

A)Height of centres from ground
B)Swing of lathe
C)Maximum speed of chuck
D)Gross weight of lathe
E)Diameter of chuck

Question 29

During oxyacetylene flame cutting, the metal is cut due to

A)Reduction process
B)Molecular transfer
C)Intensive oxidation
D)Evaporation of metal
E)Burning of metal

Question 30

If a drill does not cut; the probable cause would be

A)Drill blunt
B)Material difficult to drill
C)Speed low
D)Absence of coolant
E)None of the above

Question 31

Which of the following defect in castings may develop due to inadequate venting?

A)Misruns
B)Blow holes
C)Cold shuts
D)Parting off
E)Inclusions

Question 32

The relief angle for high speed steel tools is usually

A)30° to 60°
B)1° to 3°
C)16° to 30°
D)3° to 10°
E)11° to 15°

Question 33

The fact that how closely the instrument reading follows the measured variables is termed as

A)Threshold sensitivity
B)Fidelity
C)Precision
D)Accuracy
E)Hysteresis

Question 34

The averge cutting speed for machining mild steel by high speed steel tool is

A)30 m/min
B)50 m/min
C)20 m/min
D)10 m/min
E)40 m/min

Question 35

In metal cutting operations continuous chips are produced while machining

A)Brittle materials
B)Ductile materials
C)Hard materials
D)Soft materials
E)None of the above

Question 36

Drilling speed in aluminium nearly

A)35 to 50 m/min
B)10 to 25 m/min
C)60 to 75 m/min
D)3 to 5 m/min
E)80 to 100 m/min

Question 37

Which of the following has better machinability as compared to the remaining?

A)Low carbon steels
B)Zinc alloys
C)Parting off
D)Gun metal
E)Wrought iron

Question 38

Crossing in foundry practice is

A)A means for checking the strength of cores
B)A defect in casting that can be removed by heating in a furnace and cooling at show rate.
C)The process of addition of chemicals to the molten metal to improve its fluidity
D)The process of formation of oxides on the surface of the molten metal
E)The process of forcing metal uniformly into the mould

Question 39

Quill is

A)Curring a blind key way on an object
B)A steel tube in the head of some machine tools that encloses the bearings and rotating spindle on which are mounted the cutting tools
C)A tool used in milling machine to cut T-slots
D)A holding device used on planers
E)None of above

Question 40

Which of the following gears are not used to transmit motion from one shaft to another shaft at an angle to the first?

A)Worm gears
B)Bevel gears
C)Spur gears
D)Herringbone gears
E)Helical gears

Question 41

For defining length the standard generally followed is

A)Bar standard
B)End standard
C)Light wave standard
D)Any of the above
E)None of the above

Question 42

A flatter is made of

A)Parting off
B)High speed steel
C)Mild steel
D)High carbon steel

Question 43

Slag inclusion in castings is a

A)Internal defect
B)Defect that can be removed by felting
C)Surface defect
D)Superficial defect
E)Moulding defect

Question 44

Which one of the following methods cannot be used for producing external threads?

A)By tap
B)By dies
C)Vernier caliper
D)By rolling
E)One lathe

Question 45

The diameter of a round bar with close tolerances is quickly measured by

A)Slip gauges
B)External micrometer
C)Vernier caliper
D)Snap gauge
E)Any of the above

Question 46

Choose the incorrect statement. Good machinability results in

A)Low components cost
B)Moderate cuttng forces
C)Smaller chips
D)All of the above
E)A process of removing carbon from metals

Question 47

The main advantage of using synthetic sand in foundry is

A)It does not require moisture
B)It is less costly
C)Its properties can be easily controlled
D)It is highly refractory
E)It can take any shape

Question 48

In ball bearing steels, chromium percentage is normally in the range

A)3 - 5 percent
B)14 - 16 percent
C)5 - 10 percent
D)1 - 2 percent
E)2 - 3 percent

Question 49

A balometer is an element which senses

A)Optical input and delivers thermal output
B)Thermal input
C)Electrical input and delivers thermal output
D)Optical input and delivers electrical output
E)None of the above

Question 50

The power is transmitted by lead screw to the carriage through

A)Rack and pinion a arrangement
B)Gear system
C)Chain drive
D)Pulley drive
E)Half nut

Question 51

Drills are usually made of

A)Diamonds
B)Carbon steel
C)High speed steel
D)Carbides
E)High carbon steel

Question 52

In order to lower the cutting forces and also to decrease the cutting wear, alloying element generally added to steel for free machining is

A)Lead
B)Chromium
C)Manganese
D)Sulphur
E)Aluminium

Question 53

Tumber gears are used on lathes to

A)Reduce lead screw speeds
B)Provide automatic motion to cross-slide
C)Provide desired direction of motion to lathe carriage
D)None of the above
E)Ruby

Question 54

A triple threaded worm is in mesh with a worm wheel of 40 teeth. If the worm revolves at 1200 rpm, the of the worm wheel will be

A)10
B)90
C)30
D)40
E)270

Question 55

Gun metal is an alloy containing

A)Copper, lead, tin
B)Copper, nickel, silver
C)Copper, zinc, silver
D)Copper, tin, zinc
E)Copper, tin, silver

Question 56

A drilling machine has spindle speeds from 70 to 800 rpm in eight steps. The fourth speed from the lowest will be

A)245 rpm
B)340 rpm
C)175 rpm
D)300 rpm
E)198 rpm

Question 57

A 20 mm diameter international metric thread will have a pitch of

A)1.25 mm
B)1 mm
C)2.5 mm
D)1.50 mm
E)2.0 mm

Question 58

The angular clearance provided on dies is usually

A)7° to 9°
B)5° to 7°
C)3°to 5°
D)10° to 15°

Question 59

Last element in the tool signature is

A)nose radius
B)side cutting edge angel
C)side rake angle
D)side relief angle
E)Parting off

Question 60

In case of cast iron castings, the shrinkage allowance is

A)7-10 mm/M
B)0.1-0.01 mm/M
C)1-0.1 mm/M
D)50-75 mm/M
E)75-100 mm/M

Question 61

With increasing cutting velocity total time for machining a component

A)decreases
B)increases
C)first decreases and then increases
D)None of the above
E)All of the above

Question 62

Which of the following is a multispot welding process?

A)Projection welding
B)Percussion welding
C)Atomic hydrogen welding
D)Thermit welding
E)Seam welding

Question 63

Which of the following welding process uses consumable electrodes

A)TIG welding
B)MIG welding
C)Thermit welding
D)Gas welding
E)Laser welding

Question 64

An important factor to be taken into account while designing a core print is

A)Pouring temperature
B)Buoyancy effect of molten material
C)Type of mould
D)Pattern material
E)Moulding sand characteristics

Question 65

Hobbing process cannot be used to cut

A)Spur gears
B)Helical gears
C)Worm gears
D)Bevel gears
E)All of the above

Question 66

Choose the incorrect statement

A)Ductile materials in presence of fine feed and high cutting speed produce chips with built up edges
B)Ductile material produce continuous chip
C)Both (A) and (B)
D)None of the above
E)Any of the above

Question 67

The chips formed during the milling of aluminium are

A)closed spirals
B)Parting off
C)helical
D)snarl
E)fragments

Question 68

A gear is to have 14 teeth. Which of the following indexing movement can be used?

A)2 complete turns and 18 holes in 21 hole circle
B)Parting off
C)3 complete turns on a 42 hole circle
D)2 complete turns and 36 holes in 49 hole circle
E)2 complete turns and 6 holes in 18 hole circle

Question 69

The chips formed during broaching of steel are

A)closed spirals
B)fragments
C)splinters
D)Parting off
E)snarl

Question 70

In a turret lathe a pre-selector is a device

A)That is used to decide the operation to be done on a job prior to a specific operation
B)Used for feeding bar to chuck
C)None of above
D)That is used to pre-select the spindle speed for the next operation in progress
E)That is used to select in the job prior to loading

Question 71

A rotameter is used to measure

A)Twist due to torque applied on shafts
B)Magnetic flux variation
C)Rotation of shafts
D)rpm of engines
E)Flow of liquids and gases