Deck 10: Manufacturing and Materials Engineering

Question 1

The welding of steel structures on the site of a building is done by

A)Arc welding
B)Spot welding
C)Projection welding
D)Thermit welding
E)TIG welding

Answer 1

Arc welding

Question 2

The advantage of a pneumatically operated control system is

A)It can be used in hazardous atmosphere
B)Simplicity of components
C)Easily maintained
D)Relatively inexpensive
E)All of the above

Answer 2

All of the above

Question 3

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

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

Answer 3

1500 - 1800 M/min

Question 4

An examiner has given the following as parts of drill bit. Find which one is not correct

A)Cutting edge
B)Eye
C)Shank
D)Point
E)Dead centre

Question 5

A 20 number crucible

A)Will have height of 20 cm
B)Can take 20 cc of molten material
C)Will have capacity to melt 20 kg of copper
D)Will have internal diameter of 20 cm
E)Can produce castings of 20 kg only

Question 6

For the measurement of pressure corrosive and highly viscous liquids with the halp of pressure gauge

A)Gauge scale is modified
B)Seal pots are used
C)Bourdon tube of the gauge is changed
D)Necessary corrections are applied
E)Pressure gauge is never used in such situations

Question 7

2% Nickel in steel makes it suitable for

A)Boiler plates, rivets etc
B)Electronic valves
C)Connecting rods
D)Anti corrosion characteristics
E)Turbine blade

Question 8

IS code considers how many types of steels for designating carbon content in the steel?

A)1
B)4
C)Parting off
D)2
E)3

Question 9

In a turning operation on a horizontal axis lathe, the forces on tool act

A)only in horizontal plane in the directions of feed and cut
B)only in vertical plane in the direction of feed and vertically
C)only in vertical plane in the direction of feed and radially
D)None of the above
E)Parting off

Question 10

In a stationary type mechanical seal the sealing ring is generally located

A)In machine housing
B)Along machine shaft
C)Independently
D)None of the above.
E)None of the above

Question 11

Gold ornaments are generally produced by

A)Pressed casting
B)Slush casting
C)Investment casting
D)Die-casting
E)Centrifugal casting

Question 12

In manufacturing ERW tube the type of welding generally used is

A)Induction welding
B)Thermit welding
C)Electrical resistance welding
D)Gas welding
E)Are welding

Question 13

To clean a hand file

A)It is rubbed on stone
B)File card is used
C)It is dipped in dilute acid
D)It is rubbed on wood
E)It is dipped in water

Question 14

During MIG welding the metal is transferred in the form of

A)Metal is not transferred during MIG welding
B)Solution
C)Continuous flow of molten metal
D)A fine spray of metal
E)Electron beam

Question 15

In Rockwell test for hardness on B scale

A)A diamond cone is used
B)A mechanite ball is used
C)A steel hammer is used
D)A steel ball is used
E)A plastic hammer is used

Question 16

For soldering of brass and copper, the flux used is

A)Zinc chloride
B)Hydrochloric acid
C)Cupric acid
D)Ammonium chloride
E)None of the above

Question 17

During metal cutting operation on machine tools, the major portion of heat is carried away by

A)Chip and tool have identical heat dissipation
B)Chip
C)Work piece
D)Chip tool and work piece have identical proportion of heat dissipation
E)Tool

Question 18

The purpose of an automatic process control system generally is

A)To automatically produce goods
B)To automatically detect inferior quality goods
C)To automatically process the raw materials
D)To direct the forces that give stable plant and process operation by maintaining desired values of process variables or conditions
E)None of the above

Question 19

Which of the following process has highest power consumption in kW/cm²/min?

A)Plasma arc machining
B)Electron beam machining
C)Abrasive jet machining
D)Electro chemical machining
E)Ultrasonic machining

Question 20

Cold heading is a process of

A)Electro-machining process
B)Explosive forming
C)High energy rate forming
D)Pneumatic mechanical forming
E)Chipless machining

Question 21

For soft steel the cutting speed for lathe operations is around

A)100 m/min
B)30 m/min
C)150 m/min
D)300 m/min
E)1000 m/min

Question 22

In induction hardening the depth of hardening can be controlled by controlling

A)voltage
B)power factor
C)frequency
D)current
E)Parting off

Question 23

The surface of a slip gauge is produced by

A)Milling
B)Grinding
C)Lapping
D)Burnishing
E)Any of the above

Question 24

The transmission lag in mercury thermometers is generally

A)Low
B)Average
C)Negligible
D)Very high
E)High

Question 25

Brass is

A)Copper aluminium alloy
B)Copper-nickel alloy
C)Copper-zinc alloy
D)Copper-tin alloy
E)Copper-lead alloy

Question 26

Photoelectric transducers are used for the measurement of any phenomenon which can be used to produce

A)Variation in current
B)Variation in voltage
C)Variation in light intensity
D)Variation in flux density
E)Any of the above

Question 27

Chisels for metal cutting are

A)Hardened in the middle
B)Hardened at cutting edge
C)Hardened all over
D)Hardened at random
E)Never hardened

Question 28

Kind of tools used to undercut corners on a job that is to be hardened and ground is

A)Vee shaped tool
B)Form tool
C)Knurling tool
D)Roundnose tool
E)Parting tool

Question 29

If a drill has different lengths of cutting edges

A)Cutting edge will be over size
B)The drilled hole will be rough
C)The drilled hole will not be circular
D)The drilled hole will be smooth
E)Cutting edge will become blunt rapidly

Question 30

Plastic gears are used in

A)Toys
B)Instruments
C)Low load applications
D)Low noise applications
E)Any of the above

Question 31

Fine sand is used for preparing the moulds for

A)Symmetrical castings
B)Large castings
C)Small castings
D)Non-ferrous castings
E)Centrifugal castings

Question 32

Which one of the following measuring instruments is supposed to be most accurate?

A)Micrometer
B)Vernier dial gauge
C)Optical projector
D)Steel scale
E)Vernier caliper

Question 33

A diamond point chisel is used for

A)V-shaped grooves
B)Spherical surfaces
C)Flat surfaces
D)Convex surfaces
E)Round surfaces

Question 34

Which of the following is a chipless machining process?

A)Metal spinning
B)Knurling
C)Hobbing
D)Lapping
E)None of the above

Question 35

With HSS tools the maximum safe operating temperature is of the order of

A)200°C
B)440°C
C)640°C
D)540°C
E)340°C

Question 36

Relief angle on HSS tools usually vary from

A)11° to 15°
B)22° to 27°
C)16° to 150°
D)28° to 30°
E)3° to 10°

Question 37

Spiral flutes are provided on drill bits to

A)Help from the cutting edge of the drill point
B)Curl the chip tightly for easier removal
C)Provide passage for coolant supply
D)All of the above
E)None of the above

Question 38

Which one of the following is supposed to be least accurate?

A)Surface plate
B)Air gauge
C)Optical projector
D)Vernier micrometer
E)Steel scale

Question 39

Automobile gears are generally made of

A)Alloy steel
B)Cast iron
C)Nitrided steel
D)Cast steel
E)Non-ferrous materials

Question 40

Marform is

A)Is a foming process on lathe in which movement of tool is neither governed by cross slide nor by compound slide
B)A work holding device in which plane of rotation can be changed while working
C)A darwing process that forms metal sheet by using a movable steel punch and a rubber headed ram
D)Is a forming tool and on lathe machine to generate spherical surfaces
E)Is a gauge used to check regular surfaces

Question 41

For aluminium, the cutting speed on lathe is around

A)150 m/min
B)300 m/min
C)100 m/min
D)1000 m/min
E)30 m/min

Question 42

Which of the following defect results due to mixing of two streams of molten metal that are too cold to fuse properly?

A)Cold shut
B)Swell
C)Honey coming
D)Scab
E)Shrinkage

Question 43

The range of voltage (open circuit) in are welding is generally

A)20 - 40 V
B)100 - 150 V
C)40 - 90 V
D)150 - 230 V
E)400 - 440 V

Question 44

A Bourdon tube is generally made of

A)Monel metal
B)Beryllium copper alloy
C)Phosphor bronze
D)Stainless steel
E)Any of the above

Question 45

The chemical used in generating acetylene is

A)Charcoal
B)Calcium carbonate
C)Calcium carbide
D)Carbon
E)Crushed bone

Question 46

Which one of the following is not a part of micrometer

A)Sleeve
B)Spindle
C)Thimble
D)Anvil
E)Beam

Question 47

Plug rolling is used to

A)Reduce the wall thickness and increase the diameter of tubes already made
B)Remove out of roundness of pipes
C)Increase the wall thickness of pipes at ends
D)Reduce the diameter of pipe
E)Cut threads at the ends of pipes

Question 48

Burr is

A)Boundary between finished and unifinished portion on a work piece
B)Sharp edge remaining on the metal after curring, stamping or machining
C)A marking or work piece to identify for correct position on a work piece
D)Burnt surface of a casting
E)Unmachined portion of work piece

Question 49

Which process is used for manufacturing the body of a carburettor?

A)Die casting
B)Fine sand casting
C)Electro forming
D)Sintering
E)Metal spraying

Question 50

The silver point temperature is

A)760°C
B)1500.5°C
C)500°C
D)960.5°C
E)1100.5°C