Deck 1: Manufacturing Processes and Materials and Tools

Question 1

Cast iron gears are used where

A)Stresses on gear are not high
B)Size of the gear is large
C)High order of accuracy is not desired
D)All of the above
E)None of the above

Answer 1

All of the above

Question 2

While machining which of the following improves surface finish?

A)Parting off
B)Increased cutting speed
C)Increased depth of cut
D)Formation of built-up edge
E)Increased feed rate

Answer 2

Increased cutting speed

Question 3

Optical flats are made of

A)Quartz
B)Steel
C)Plastic
D)Brass
E)Bakelite

Answer 3

Quartz

Question 4

Dry blast cleaning involves

A)Blasting the surface with abrasive material
B)Blasting the surface with air only
C)Blasting the surface with sand
D)Blasting the surface with oil
E)None of the above

Question 5

A right hand tool on lathe machine will cut efficiently while cutting

A)In either direction
B)Grooved jobs
C)From right to left
D)Taper
E)From left to right

Question 6

Ceramic tool inserts are fixed to the tool holder by

A)Casting
B)Soldering
C)Resistance welding
D)Brazing
E)adhesives

Question 7

The pouring of molten metal during casting should be stopped when

A)Molten metal rises in the riser
B)Molten metal is exhausted
C)Molten is full
D)Molten metal is seen through the riser
E)Molten metal flows out of the riser

Question 8

In shearing operation on a power press, total cutting force depends on

A)sharpness of cutting edge
B)clearance between die and punch
C)angle of shear on die and punch
D)All of the above
E)Parting off

Question 9

Which strength is the major consideration, which of the following process should be favoured

A)Forging
B)Sand casting
C)Die casting
D)Hot rolling
E)Any of the above

Question 10

While cutting double start threads of pitch 2 mm on a lathe, the cutting tool will advance by

A)4 mm/revolution
B)2 mm/revolution
C)1 mm/revolution
D)8 mm/revolution

Question 11

In ultrasonic welding the frequency range is generally

A)80,000 - 800,000 cps
B)100 - 4000 cps
C)20,000 - 80,000 cps
D)800,000 - 5000,000 cps
E)4000 - 20,000 cps

Question 12

In which of the following process the electrode is not consumed?

A)TIG welding
B)Gas welding
C)DC arc welding
D)Plasma welding
E)Laser welding

Question 13

Which of the following is a clearance fit?

A)Press fit
B)Force fit
C)Push fit
D)Sliding fit
E)Driving fit

Question 14

Which hardening process is free from scale formation?

A)Flame hardening
B)Nitriding
C)Cyaniding
D)Induction hardening
E)Parting off

Question 15

Miter gears are

A)Gears of different modules
B)Spur gears of equal diameter and pitch
C)Helical gears of same module
D)Right angled bevel gears having the same number of teeth
E)None of above

Question 16

In gas welding using oxygen and acetylene cylinders the pressure of gas is more in

A)Aetylene cylinders
B)Equal in both cylinders
C)Oxygen cylinder
D)400 - 440 V

Question 17

Some substances generate voltage when they are subjected to mechanical forces or stresses along specific planes. Such subtances are known as

A)Photo-electric
B)Megneto-electric
C)Thermo-electric
D)Piezo-electric
E)Radio-active

Question 18

Ball bearing races are

A)Lapped
B)Ground
C)Nickel plated
D)Buffed
E)Turned

Question 19

In centreless grinding the regulating wheel is inclined at an angle

A)12° - 24°
B)9°-15°
C)1° - 8°
D)15° - 18°
E)25° - 35°

Question 20

Which of the following operation is not involved in heat treatment of steels

A)Tumbling
B)Cyniding
C)Annealing
D)Normalizing
E)Strain drawing

Question 21

The surface roughness on a drawing is represented by

A)Circle
B)Triangle
C)Zig-zag lines
D)Square
E)Curve

Question 22

A rack is a gear of

A)Infinite pitch
B)Infinite number of teeth
C)Infinite diameter
D)Infinite clearance
E)Infinite module

Question 23

The shears used for making circular cuts are known as

A)Curved shears
B)Straight shears
C)Any of (A) or (B)
D)Parting off

Question 24

For the measurement of temperature the transduction method could be

A)Capacitive
B)Inductive
C)Electron tube
D)Piezo-electric
E)Resistance

Question 25

Cores are used

A)To make castings sound
B)To strengthen mould
C)To get cavity or recess in a casting
D)To get smooth surface on castings
E)In symmetrical casting only

Question 26

Which of the following process will be preferred for joining thin foils?

A)Thermit welding
B)Gas welding
C)MIG welding
D)DC arc welding
E)Plasma arc welding

Question 27

Resistance wire strain gauge works on the principle

A)That conductivity is directly proportional to load on member
B)Due to elongation length increases and diameter reduces, thereby resistance changes
C)That resistance chanes in proportion to strain on material
D)That resistance of wire changes with load
E)That the resistance of a wire is directly proportional to diameter and inversely proportional to length

Question 28

If the correctness of profile of a thread is to be checked which instrument would you choose?

A)Screw pitch gauge
B)Telescopic gauge
C)Optical projector
D)Sine bar
E)Bench micrometer

Question 29

Which is the first element of the tool signature?

A)Side relief angle
B)Side rake angle
C)Parting off
D)Back rake angle
E)Nose radius

Question 30

The surface finish obtainable in abrasive jet machining is of the order of

A)0.5 to 1.2
B)20 to 50
C)12 to 20
D)2 to 5
E)50 to 100

Question 31

Beak horn stake (Bick Iron) is used to

A)Make circular folded seams
B)Parting off
C)Bend sheet metal into cylindrical/conical shapes
D)Make straight and shorp bends

Question 32

Paper cutting knives steel contains carbon percentage

A)0.2 to 0.4%
B)Below 0.2%
C)1.3 to 1.5%
D)0.8 to 1%
E)0.4 to 0.7%

Question 33

In broaching operation the accuracy that can be obtained is of the order of

A)100 micron
B)1 micron
C)0.1 micron
D)1000 micron
E)10 micron

Question 34

Steam condenser tubes are generally made of

A)Brass
B)Bronze
C)Bell metal
D)Admiralty alloy
E)Babbit metal

Question 35

The decibel is

A)Unit of noise level
B)A logarithmic ratio between a measured quantity and a reference quantity
C)Quantity of noise per unit area
D)A logarithmic ratio between a measured quantity and 100
E)None of the above

Question 36

In a cupola the raw material is

A)Steel ingots
B)Pig iron and iron scrap
C)Steel billets
D)Iron ore
E)Cast steel

Question 37

Principal materials used in soldering are

A)Tin and lead
B)Copper and tin
C)Zinc and copper
D)Copper and lead
E)None of the above

Question 38

A 30 mm diameter is being machined when the chuck is revolving at 100 rpm. The cutting speed is nearly

A)50 metres per minute
B)40 metres per minute
C)30 metres per minute
D)60 metres per minute
E)70 metres per minute

Question 39

Out of the following materials which one is expected to have highest melting point?

A)Lead
B)Tungsten
C)Palladium
D)Silver
E)Gold

Question 40

Which of the following is not used for orthogonal cutting?

A)Drills
B)Slotting cutter
C)Parting off
D)Sawing
E)Broaching

Question 41

Vacuum is the medium of machining in cases of

A)Ultrasonic machining
B)Laser beam machining
C)Plasma arc machining
D)Electro discharge machining
E)Electron beam machining

Question 42

A job made by forging is

A)Parting off
B)Weaker than a job made by casting or machining
C)Stronger than a job made by casting or machining

Question 43

In metal cutting operations shear angle is defined as the angle

A)Made by the plane of shear with the direction of tool travel
B)Made by the shear plane with the tool axis
C)Made by shear plane with the central plane of work piece
D)None of the above
E)Wood

Question 44

In which of the following machining process thermoelectric energy is used for machining operations?

A)Ion beam machining
B)Electro discharge maching
C)Laser beam machining
D)Electro beam machining
E)All of the above

Question 45

A shim is

A)A surface on which bearings are fitted
B)A treatment given to a surface to prevent rusting
C)A kind of shrink fit
D)A thin piece of sheet metal used between mating parts to provide the proper distance
E)A dull corner on a shaft

Question 46

For the measurement of pressure of liquids at high temperature using pressure gauge

A)Gauge is heated to the temperature to be measured
B)Necessary thermodynamic calculations are made
C)Necessary correction factory is applied
D)A siphon filled with liquid is used to protect the Bourdon tube
E)Pressure gauge is never used in such cases

Question 47

Work holding faces of a bench vice are

A)Grooved
B)Parting off
C)Serrated
D)Smooth

Question 48

Balometers are used for the measurement of

A)Temperature input
B)Thermal radiation
C)Electrical input
D)Optical input
E)Pneumatic input

Question 49

A steady rest is used for

A)Long jobs
B)Irregular jobs
C)Large diameter jobs
D)Threading jobs
E)All of the above

Question 50

If the rake angle on a HSS lathe tool is 25 degrees the materials being machined is

A)Cast iron
B)Aluminium
C)Mild steel
D)Carbon steel
E)High speed steel