Deck 7: Manufacturing and Machining Techniques

Question 1

A rack is gear of

A)Infinite pitch
B)Infinite module
C)Infinite diameter
D)Infinite number of teeth
E)None of the above

Answer 1

Infinite number of teeth

Question 2

A left hand tool on a lathe cuts most efficiently when

A)Automatic feed is connected
B)It travels from left to right
C)It is operated by compound slide
D)It travels from right to left
E)It travels across the bed

Answer 2

It travels from left to right

Question 3

A Bick iron is made of

A)High speed steel
B)Tool steel and hardened
C)While cast iron
D)Parting off

Answer 3

While cast iron

Question 4

Which of the following is a process of chipless machining?

A)Gear shaving
B)Honing
C)Broaching
D)Hobbing
E)Cold heading

Question 5

Which one of the following methods can be used for turning external tapers only?

A)Form tool
B)Tail stock offset
C)Reamer
D)Compound rest
E)Taper attachment

Question 6

Plain and butt welds may be used on materials upto approximately

A)100 mm thick
B)75 mm thick
C)50 mm thick
D)40 mm thick
E)25 mm thick

Question 7

Greater proportion of heat in a cutting operation is produced in the region of

A)tool-chip interface
B)shearing plane of chip
C)tool and work piece contact
D)None of the above
E)Parting off

Question 8

The function of a chip breaker in a cutting tool is

A)To provide smooth path for long chips
B)To get long curled chips
C)To break the chips into short segrments
D)To remove chips from bed
E)None of the above

Question 9

Continuous chips in ductile metals is promoted by

A)Small rake angle
B)Reduce the wall thickness and increase the diameter of tubes already made
C)Low cutting speed
D)Insufficient cooling
E)Rine feed

Question 10

A stub tooth is one that is

A)Thicker in proportion to its length than involute tooth
B)Smaller in proportion to its length than the involute tooth
C)None of these
D)Vernier caliper
E)Same as involute tooth

Question 11

Gear tooth vernier is used to measure

A)Pitch line thickness of gear tooth
B)Addendum and dedendum
C)Gear tooth thickness
D)Module
E)Gear tooth profile

Question 12

The moisture content of wood used for patterns should be

A)More than 25%
B)Zero
C)More than 20%
D)Less than 15%
E)1%

Question 13

The coefficient of friction between chip and tool is the variable. It can be reduced by

A)Reducing the width of tool
B)Reducing the depth of cut
C)Reducing the effective rake angle
D)None of these
E)None of the above

Question 14

A collimated light beam is used for producing heat in

A)Percussion welding
B)TIG welding
C)Plasma welding
D)MIG welding
E)Laser welding

Question 15

A time switch is

A)A switch which operates for a fixed time only
B)A switch which gets energised with time
C)A 24 hour timing device used to open and close electric circuits according to time of day on a continually repeating schedule
D)A switch with records timings of operation of a circuit
E)None of the above

Question 16

In instrumentation a correction is

A)Reading-error
B)Range of error-degree of correctness
C)The revision applied to the indicated value so that the final result obtained improves the worth of the result
D)Lowest value of input which does not indicate the result
E)An error

Question 17

A 12 mm drilling machine means

A)It can drill holes in 12 mm thick plates
B)It can drill holes maximum 12 mm in diameter
C)It can be used for crilling holes having cross-sectional area of 12 sq mm
D)All of the above
E)None of the above

Question 18

A sprue is

A)A process of cleaning castings
B)A chemical added to molten materials to get sound castings
C)A tool used in mould repairing
D)A special type of non-ferrous core used in centrifugal castings only
E)A vertical passage through the cope and connecting the pouring basin to the runner or gate

Question 19

Which one of the following methods is generally not used in welding of chromium molybdenum steels

A)100 mm thick
B)Thermit
C)Submerged arc
D)Oxyacetylene
E)Resistance

Question 20

Which of the following is the most rapid quenching medium?

A)Solution of caustic soda
B)High flash point oil
C)Parting off
D)Air
E)Water

Question 21

The length of hacksaw blades is

A)Parting off
B)200 - 300 mm
C)300 mm - 400 mm
D)150 mm - 250 mm

Question 22

In production work where several castings are required

A)Parting off
B)match plate patterns are used
C)split patterns are used
D)loose piece patterns are used
E)gated patterns are used

Question 23

In following operations are to be performed on a job, which one would be performed first

A)Tapping
B)Sport facing
C)Boring
D)Drilling
E)Counter sinking

Question 24

Toole life cannot be defined as

A)number of minutes after which tool failed
B)machine time in minutes for which tool performed satisfactorily
C)average length of cut per cutting edge
D)None of the above
E)Parting off

Question 25

Which of the following press is best suited for embossing?

A)Knuckle joint press
B)Toggle action press
C)Double action press
D)None of the above
E)Parting off

Question 26

Coarse feed, low rake angle, low cutting speed and insufficient cooling help produce

A)continuous chips with built up edges in ductile materials
B)discontinuous chips in brittle materials
C)discontinuous chips in ductile materials
D)continuous chips in ductile materials
E)Parting off

Question 27

The chisels used in sheet metal work have

A)Rounded cutting edge
B)Straight cutting edge
C)Any of (A) or (B)
D)Parting off

Question 28

The processes used for the machining of sintered and tungsten carbide is

A)Grinding process
B)Electroforming process
C)Explosive forming process
D)Turning process
E)None of the above

Question 29

Nitrided steel is used for gears where

A)Variable load operation is desired
B)Low speed operation is desired
C)Varying stresses are expected on teeth
D)High hardness is desired on teeth
E)Variable speed operation is desired

Question 30

Which one of the following cannot be used as a moulding material

A)Wood
B)Cement
C)Glass
D)Paper
E)Rubber

Question 31

Severe quenching may lead to

A)superficial hardness
B)blow holes
C)formation of cracks
D)warping
E)Parting off

Question 32

Steel balls are required in large quantities. Which process would you select for the manufacture?

A)Cold heading
B)Turning on a Capstan of Turret lathe
C)Casting
D)Turning on a lathe
E)Turning on a automatic lathe

Question 33

A half nut is

A)A double start nut for a quick shift
B)Mechanism that locks the lathe carriage to the lead screw for thread cutting
C)Nut with half the standard pitch
D)Damaged nut
E)Nut manufactured in parts

Question 34

Out of the following materials which one will have lowest temperature of freezing?

A)Copper
B)Zinc
C)Gold
D)Lead
E)Tungsten

Question 35

Trepanning tool is used on

A)Milling machine
B)Planers
C)Lathes
D)Power presses
E)Cold heading machine

Question 36

A blunt tool is used in

A)knurling
B)piercing
C)Parting off
D)gear shaving
E)hot spinning.

Question 37

Suitable change wheels for cutting 17 T.P.I. on 4 T.P.I. lead screw lathe are

A)10 to 65
B)15 to 85
C)20 to 85
D)30 to 105
E)None of the above

Question 38

For the measurement of velocity, the transduction method could be

A)Capacitive
B)Inductive
C)Magneto-electric
D)Photoelectric
E)Any of the above

Question 39

Burnishing operation is done with the help of

A)Abrasives
B)Dielectrics
C)Balls
D)Lubricating oils
E)Any of the above

Question 40

Which of the following process connot be carried out on lathe machine?

A)Notching
B)Riveting
C)Punching
D)Blanking
E)All of the above

Question 41

Which of the following operations is known as 'sweating'

A)Tinning the two surfaces to be joined, applying flux and heating
B)Heating two surfaces to be joined, to the high temperature in presence of flux
C)Heating two surfaces at low temperature
D)Joining of two surfaces without use of flux
E)None of the above

Question 42

The stake used for making conical shapes is known as

A)Parting off
B)Hatchet stake
C)Funnel stake
D)Moon stake

Question 43

A special form of piercing in which the entire contour is not cut, is known as

A)Lancing
B)Notching
C)Trimming
D)Slotting
E)None of the above

Question 44

Carbon tool steels generally loose their hardness above

A)50°C
B)200°C
C)100°C
D)Parting off
E)125°C

Question 45

Loading of grinding wheel occurs when

A)Parting off
B)part of grinding surface gives way
C)long cracks develop on grinding wheel from centre to outer diameter
D)abrasive grains become clogged with particles of metal being ground
E)follow cavities are formed on the surface of grinding wheel

Question 46

Preferred numbers are the numbers in

A)arithmetic progression
B)Parting off
C)harmonic progression
D)Logarithmic progression
E)geometric progression

Question 47

Surveying tapes are generally made of

A)Invar
B)Nichrome
C)Constantan
D)Nicheloy
E)Muntz metal

Question 48

In gas welding, the welding rods of 30 mm diameter are available. What will be the maximum thickness of material that can be welded with this rod?

A)3 mm
B)25 mm
C)12 mm
D)6 mm
E)30 mm

Question 49

The temperature scanning system are used

A)Where temperature control at a point is important
B)Where temperature difference between two points is important
C)Where system is capable of working without temperature control
D)Where monitoring of a relatively large number of temperatures is needed
E)None of the above

Question 50

A good cutting action is indicated by

A)High cutting ratio
B)Low cutting ratio
C)Low chip reduction coefficient
D)None of the above
E)Bakelite