Deck 8: Mechanical Engineering: Foundry, Machining, and Materials

Question 1

The facting sand used in foundry generally consists of

A)Alumina, clay and silica
B)Aluminium and silica
C)Silica and clay
D)Alumina and clay
E)Silica and binder

Answer 1

Silica and clay

Question 2

A massometer is

A)An instrument for the measurement of mass
B)An instrument of measurement of specific gravity of flowing fluids
C)An instrument for the measurement of mass of fluid flowing through a pipes
D)An instrument used for measuring mass of free flowing solids through conveyor pipes
E)None of the above

Answer 2

An instrument used for measuring mass of free flowing solids through conveyor pipes

Question 3

Carbon tool steel are broadly classified into two categories as

A)hard and soft
B)warping and non-warping
C)Parting off
D)water hardening and oil hardening
E)hard and brittle

Answer 3

water hardening and oil hardening

Question 4

Green sand moulds are

A)Painted with green paint
B)Made out of green coloured sand
C)Green in colour
D)Made from damp moulding sand
E)Skin dried moulds

Question 5

The fuel used in pit furnace is generally

A)Charcoal
B)Wood
C)Coke
D)Coal
E)Oil

Question 6

A pair of tumbler gears is used in

A)Milling machine
B)Shaper
C)Capstan lathe
D)Grinding machines
E)Centre lathe

Question 7

Cast iron pipes are cast by

A)Investment casting process
B)Vacuum moulding process
C)Centrifugal casting process
D)Loam moulding process
E)Die casting process

Question 8

Thermocouples are generally used for accurate temperature measurement upto

A)1000°C
B)200°C
C)100°C
D)1600°C
E)500°C

Question 9

Discontinuous chip in ductile material is produced because of

A)Insufficient cooling
B)Sharp cutting edge
C)Sintering
D)Low friction
E)Large rake angle

Question 10

In power presses bolster plate is used to

A)Parting off
B)mount the press tool
C)cut the edges
D)eject the pressed component
E)position the piece

Question 11

Draft allowance on castings is generally

A)20 - 30 mm/M
B)5 - 10 mm/M
C)2 - 5 mm/M
D)10 - 15 mm/M
E)1 - 2 mm/M

Question 12

Railway rails are generally made of

A)Mild steel
B)Alloys steel containing 0.8 to 0.9% carbon
C)High carbon steel
D)Medium carbon steel
E)Deam mild steel

Question 13

Sweep patterns are used for

A)Tiny objects
B)Objects of circular shapes
C)Elliptical objects
D)Rectangular objects
E)Irregularly shaped objects

Question 14

The linear characteristics of valve is

A)In which the length of valve is more than 10 times the width
B)In which the longest parameter of valve is not less than 20 times the widest part of the valve
C)In which the valve steam operates linearly
D)One in which the flow is directly proportional to the valve lift
E)None of the above

Question 15

Which of the following is not true for diamond?

A)Parting off
B)If the hardest substance known
C)Expensive to be shaped
D)It is ductile
E)It is also used as a cutting tool

Question 16

Which of the following material connot be forged?

A)Cast iron
B)Low carbon steel
C)Dead mild steel
D)Eutectoid steel
E)Carbon chrome steel

Question 17

For cylindrical grinding the peripheral speed will be of the order of

A)800 m/min
B)180 m/min
C)9000 m/min
D)18000 m/min
E)1800 m/min

Question 18

Generally the pattern used in manufacturing cast iron pipes are

A)Solid pattern
B)Match-plate pattern
C)Split pattern
D)Sweep pattern
E)None of the above

Question 19

Which of the following non-traditional machining process will have inferior surface finish as compared to the remaining processes?

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

Question 20

The type of bearing suitable for high temperature applications where lubrication is impossible and where corrosion or chermical action limits choice of material, would be

A)Carbon graphite bearing
B)Needle bearing
C)Aluminium bearing
D)Cast iron bearing
E)Jewel bearing

Question 21

The selection of non-traditional machining process for a particular application depends on

A)Physical parameters of the process
B)Shspes to be machined
C)Process capability
D)Economics
E)All of the above

Question 22

The cutting speed is usually low in case of

A)Soft material
B)Regular shaped materials
C)Castings
D)Stepped shafts
E)None of the above

Question 23

Continuous chips may be formed while machining

A)Ductile material
B)Non-ferrous material
C)Hard material
D)Tough material
E)Brittle materials

Question 24

Solder contains

A)Lead and tin
B)Lead and silver
C)Silver and nickel
D)Nickel and lead
E)Tin and silver

Question 25

A swab is

A)A tool used in foundry for moistening the sand
B)A pneumatic tools
C)A tool used in foundry for repairing the mould
D)A tool used in foundry for smoothening the mould
E)A tool used on shaper

Question 26

Hardness tester used for determining the hardness of a core is bearly identical to which of the following?

A)Vickers hardness tester
B)Rockwell hardness tester
C)Brinell hardness tester
D)Shore's scleroscope
E)Parting off

Question 27

In gang milling

A)Work is fed into the rotation of cutter
B)A cutter generates two or more plain surface simultaneously
C)Work moves in the opposite direction as the rotating of the cutter
D)Work moves in the same direction as the rotation of the cutter
E)More than one cutter is simultaneously used

Question 28

A gagger is

A)A tool used in clearing material before welding
B)A, L shaped metal accessory used in floor moulds to support hanging bodies of sand in cope
C)A device for removing foreign particles from sand
D)A tool used in clearing welds
E)A tool used in foundry for cleaning of castings

Question 29

Which of the following is gear finishing process?

A)Gear lapping
B)Gear shaving
C)Gear grinding
D)All of the above
E)None of the above

Question 30

Abrasive GC indicates

A)White Al₂O₃
B)Parting off
C)Al₂O₃
D)Green grit SiC
E)SiC

Question 31

The primary detector in a pressure gauge is usually

A)Bellows
B)Diaphragm
C)Spring
D)Bourdon tube
E)Coil spring

Question 32

Which type of gears can be manufactured by extrusion process?

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

Question 33

Chip breaker is

A)an obstruction attached to face of the tool
B)a hammer used to break the chips
C)a coolant forced under pressure on the chip
D)None of the above
E)Parting off

Question 34

Point angle of 135° to 150° is used on drills while drilling

A)hard steels
B)nickel alloys
C)thin sheet metals
D)Any of the above
E)Parting off

Question 35

Back rake angle while turning brass is

A)5°
B)10°
C)Parting off
D)22°
E)0°

Question 36

The cutting tool is

A)Goose neck tool
B)Parting tool
C)Threading tool
D)Boring tool
E)Drilling tool

Question 37

The standard taper provided on the tapered shank of drills is known as

A)Chapman taper
B)Morse taper
C)Jarno taper
D)Taper No. 1
E)None of the above

Question 38

A gear has a pitch diameter of 5.732 inches and circular pitch

A)5
B)9
C)7
D)3
E)1

Question 39

Which of the following material is difficult to be spot welded?

A)Cold rolled mild steel sheet
B)Hot rolled mild steel sheet
C)Stainless steel
D)Copper
E)None of the above

Question 40

Hardness of diamond can be determined by

A)Brinell hardness tester
B)Rockwell hardness tester
C)Vickers hardness tester
D)None of the above
E)Parting off

Question 41

In case of turning or milling, the surface roughness is expected to be in the range

A)20 to 50
B)5 to 15
C)50 to 100
D)100 to 250
E)250 to 500

Question 42

True centrifugal casting is used to

A)Get accurate castings
B)Get chilled castings
C)Get dynamically balanced castings
D)Get statistically balanced castings
E)Cast objects symmetrical about an axis

Question 43

While using high speed steel tools, the cutting speed will be highest for which of the following steel?

A)Alloy
B)Stainless steel
C)Parting off
D)Medium carbon steel
E)Mild steel

Question 44

If a piece of steel is reheated to a temperature of 200°C to 250°C immediately after quenching, the process is known as

A)Hardening
B)Cyniding
C)Normalizing
D)Tempering
E)Annealing

Question 45

Spot facing is

A)Localised machining of a component
B)None of above
C)A spot prepared on shaper or milling machine
D)Machining of a spot to fit other parts
E)Mahining of spol on the surface of a part to furnish a flat bearing or the head of a holt or nut

Question 46

Hollow punches are used for making holes upto

A)10 mm and above
B)Parting off
C)(5 - 8) mm
D)(6 - 9) mm

Question 47

A plug gauge is used for measuring

A)Spherical holes
B)None of above
C)Screw threads
D)Cylindrical bores
E)Taper bores

Question 48

Angle plate is

A)Used for measurement of angles
B)Used for cutting angles on jobs on shaper
C)Used for holding angular jobs in milling machine.
D)Cast iron jig used to hold work in a vertical position of layout or machining
E)None of above

Question 49

Ablation mechanism is used in which of the following machining process?

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

Question 50

A photo-electric device in which the resistance of the metal changes directly proportional to the ligh striking on it is known as

A)Photo-cell
B)Photo-emission
C)Photo-voltaic cell
D)Photo-conductive cell
E)None of the above