Deck 5: Mechanical Engineering Processes and Concepts

Question 1

Feeler gauge is used for measuring clearance between two

A)round surfaces
B)spherical surfaces
C)Parting off
D)flat surfaces
E)tapering surfaces

Answer 1

flat surfaces

Question 2

Preheating is usually done while welding

A)Cast iron
B)Aluminium
C)Thin sheets of mild steel
D)Thick sheets of mild steel
E)Copper

Answer 2

Cast iron

Question 3

EN series is used to designate

A)aluminium alloys
B)steels
C)organic materials
D)Parting off
E)copper alloys

Answer 3

steels

Question 4

Sweep patterns are used for

A)Circular shape objects
B)Rectangular objects
C)Any large size objects
D)Ellipucal objects
E)Tiny objects

Question 5

Kuock out mechanism in press is used to

A)chamfer the edges
B)eject out the component
C)shift the position of work piece after one operation
D)None of the above
E)Parting off

Question 6

While machining cast iron generally cutting fluid is not required because

A)Cast iron surface is generally rough
B)The cast iron jobs revolves at low speeds
C)Cast iron contains graphite which does not allow temperatures to rise
D)Cast iron contains carbon which cools the job
E)None of the above

Question 7

An idler pulley is used for

A)Changing the direction of rotation
B)Running during no load period
C)For stopping the motion frequently
D)For adjusting the belt tension
E)None of the above

Question 8

Trepanning operation is used for

A)Producing large holes
B)Under cutting
C)Cutting grooves
D)Finishing the ends of the job
E)Bevelling the edges

Question 9

The difference between a plate and sheet is

A)A plate is less than 5 mm in thickness
B)A sheet is more than 5 mm in thickness
C)A sheet is always more than 5 metres in length
D)Sheet and plate are same and thickness is immaterial
E)A sheet is always less than 5 mm thick and a plate more than 5 mm thick

Question 10

Arc blow is a welding defect which is encountered

A)In thermit welding
B)In MIG welding
C)In arc welding using a.c. current
D)In arc welding using d.c. current
E)In gas welding

Question 11

At what rpm should a lathe be run to give a cutting speed of 25 m/min. When turning a rod of diameter 32 mm.

A)Parting off
B)160 rpm
C)100 rpm
D)200 rpm
E)250 rpm

Question 12

Mechanical seals are used

A)To prevent vibrations
B)To prevent leakage
C)To reduce friction
D)To balance the equipment
E)None of the above

Question 13

The thickness of clearance can be checked by

A)Shap gauge
B)Ring gauge
C)Go and not go gauge
D)Feeler gauge
E)Any of the above

Question 14

A process applying oxide coating on aluminium is known as

A)Anodizing
B)Oxidizing
C)Pickering
D)Galvanising
E)Blanking

Question 15

The advantage of mercury switch is

A)No mechanical moving parts
B)No open contacts
C)Sealed from dirt and contamination
D)Maintanance free
E)All of the above

Question 16

The advantage of electronically operated automatic control system is

A)Can be located in hazardous locations
B)Needs no maintenance
C)Does not require skilled service personnel
D)No time lags, no transmission delays
E)Does not cost much

Question 17

International Prototype Meter is made of

A)Copper
B)Mild steel
C)Cast iron
D)Copper-nickel alloy
E)Platinum-iridium alloy

Question 18

Die sinking is

A)The process of hardening of dies by sinking in quenching oil
B)The local cooling of dies on the dia surface by pouring oil on the spot
C)The process of cutting die impression
D)The process of scrapping a die impression so that remaining metal may be retrieved for further use
E)None of the above

Question 19

The mallets used in sheet metal shop are made from

A)Parting off
B)Cast iron
C)Wood, fiber
D)Mild steel

Question 20

A circular mill is

A)A circle of 1 metre diameter
B)A milling operation done on lathe is known as circular mill
C)A milling machine used for cutting circular jobs by giving motion to the job during cutting
D)Area of a circle of 1 mile radius
E)Area of 0.001 inch diameter circle

Question 21

The method of joining metals by means of cast iron alloy whose melting point is below 425°C is known as

A)Non-ferrous welding
B)Soldering
C)Brazing
D)Galvanising
E)Adhesive bonding

Question 22

The important factor to be considered while selecting a bearing is

A)Applied load
B)Operating speed range
C)Required bearing capacity
D)All of the above
E)None of the above

Question 23

The purpose of sometimes adding exothermic materials to sand is

A)To dry the mould
B)To produce directional solidification by the generation of heat
C)To produce chilled surfaces
D)To heat the core
E)To heat the sand

Question 24

The backlash between gears is expressed in terms of

A)Difference between addendum and dedendum
B)The difference between PCD of two gears
C)The actual gear width on pitch circle minus the standard gear width for given number of teeth on gear
D)Clearance between faces of the mating gears
E)None of the above

Question 25

In all the following case chips produced are in the form of fragments EXCEPT

A)Trepanning of steel
B)Facing of bronze
C)Shaping of cast iron
D)Milling of aluminium
E)Parting off

Question 26

While using HSS tools on a lathe, cutting speed will be maximum when machining

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

Question 27

Heating elements for domestic and industrial electrical applications are made of

A)Babbit metal
B)Invar
C)Delta metal
D)Duralumin
E)Nichrome

Question 28

The process of joining two slip gauges is known as

A)Piercing
B)Wringing
C)Welding
D)Pressing
E)Soldering

Question 29

When 50 mm rod is turning at a spindle speed of 200 rpm the cutting speed would be

A)15 - 20 m/min
B)10 - 12 m/min
C)12 - 15 m/min
D)30-35 m/min
E)20 - 28 m/min

Question 30

The commonly used material for thermocouples is

A)Chromel-copper
B)Chromel-alumel
C)Platinum-rhodium
D)Any of the above
E)None of the above

Question 31

It is desired to remove large quantity of material from a job in shortest possible time, on a lathe using high speed steel cutter. Which of the following step will be helpful?

A)Reduce spindle speed and increase depth of cut
B)Increase spindle speed and take light cuts
C)Increase spindle speed and take light cuts.
D)At the speed corresponding to cutting speed take roughing cuts of maximum possible depth
E)None of the above

Question 32

Which surfaces are usually 'wrung' together?

A)Gears
B)Slip gauges
C)Threads
D)Drill shanks and collets
E)Bed guides for lathe

Question 33

Which of the following is often used as flux in brazing process?

A)Fevicol
B)Iron dust
C)Borax
D)Ammonia chloride
E)Turpentine

Question 34

A crater is a pit formed on

A)flank of tool
B)face of tool
C)surface of work piece
D)None of the above
E)Parting off

Question 35

Green colour on a pattern indicates

A)Seats for loose core prints
B)Fillets
C)Surface to be machined
D)Core prints
E)Surface to be left unmachined

Question 36

Shear angle varies with

A)Feed
B)Depth of cut
C)Material of tool
D)Work piece materials and tool geometry
E)Cutting speed

Question 37

Weld spatter is

A)A flux
B)A filler material used in gas welding
C)A welding defect
D)An electrode used in inert atmosphere
E)A filler material used in soldering

Question 38

In centreless grinding, work piece is clamped in

A)Chuck
B)Bed
C)Vice
D)Not clamped
E)Collet

Question 39

Straight fluted drills are used for

A)Amorphous materials
B)Ferrous materials
C)Brass and soft materials
D)Very hard materials
E)Brittle materials

Question 40

Carbondioxide is

A)Neutral gas
B)Combustible gas
C)Rare gas
D)Inactive gas
E)Ionic gas

Question 41

Necking is

A)Preparation of surface for brazing
B)Hole drilled for riveting
C)Drilling a hole in a plate
D)Machining a groove around cylindrical shaft
E)Initial spot welding to position jobs

Question 42

The main advantage of investment casting is

A)It can be conveniently adopted for heavy castings
B)High degree of accuracy and surface finish
C)There is no sophisticated technology involved
D)No special tooling is required
E)Raw materials required are cheap

Question 43

Cutting speeds for some materials are given as

A)30 m/min
B)20 m/min
C)100 m/min
D)40 m/min
E)80 m/min

Question 44

Large size bolt heads are made by

A)Hammering
B)Roll forging
C)Upset-forging
D)Swaging
E)Casting

Question 45

Cyaniding

A)A process of annealing a ferrous alloy
B)A process of case hardening
C)A process of removing carbon from metals
D)A process of hardening and tempering
E)A process used on non-ferrous materials for improving surface quantities

Question 46

In climb milling

A)Work moves in same direction as rotation of the cutter
B)Tool climbs on the work piece for cutting operation
C)Cutting takes place in two planes simultaneoudly
D)Work is fed to cutter in lateral direction
E)Work moves in opposite direction as rotation of the cutter

Question 47

Which of the following is basically a polishing operation?

A)Lapping
B)Soft grinding
C)Honing
D)Parting off
E)Buffing

Question 48

When a thin job is to be machined on a shaper, in order to prevent warping, which one of the following steps should be taken first?

A)Light cut
B)Heavy cut
C)Single heavy cut
D)Any of the above
E)Vernier caliper

Question 49

Which of the following metal is best suited for electro forming?

A)Lead
B)Silver
C)Mild steel
D)Aluminium
E)Zinc

Question 50

Discontinuous chips in brittle materials are promoted by

A)low cutting speed and insufficient rake angle
B)coarse feed and low cutting speed
C)low cutting speed and insufficient coolant
D)None of the above
E)Parting off