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MES P8 2025 Unit 3 assignment

Total questions: 60

Worksheet time: 30mins

Name
Class
Date
1.

Casting is a process in which

a)

Solid metal is pressed

b)

Molten metal is poured into a mould

c)

Metal is drawn through a die

d)

Metal is hammered into shape

2.

The solidified object taken out of a mould is called

a)

Pattern

b)

Casting

c)

Core

d)

Mould

3.

The upper moulding flask is known as

a)

Drag

b)

Cope

c)

Cheek

d)

Riser

4.

A core is used in a mould to produce

a)

External features

b)

Smooth surfaces

c)

Hollow cavities

d)

Shrinkage compensation

5.

The passage through which molten metal enters the mould cavity is called

a)

Gate

b)

Runner

c)

Sprue

d)

Riser

6.

Riser is used to compensate for

a)

Liquid shrinkage

b)

Draft allowance

c)

Shake allowance

d)

Pouring defects

7.

Facing sand is used to

a)

Increase permeability

b)

Improve surface finish

c)

Reduce mould cost

d)

Strengthen the mould

8.

Parting line refers to

a)

Line where core is placed

b)

Line separating two mould halves

c)

Line for riser placement

d)

Tool shifting line

9.

Vents are used in moulds to

a)

Increase casting strength

b)

Expel trapped gases

c)

Pour molten metal

d)

Shape the cavity

10.

The material used for majority of sand moulding is

a)

Silica sand

b)

Clay

c)

Carbon

d)

Cement

11.

Draft allowance is provided to

a)

Allow machining

b)

Avoid metal shrinkage

c)

Facilitate pattern withdrawal

d)

Prevent blow holes

12.

Shrinkage allowance is given to compensate for

a)

Mould expansion

b)

Metal contraction on cooling

c)

Air entrapment

d)

Surface finishing

13.

Which pattern is made in two halves?

a)

Solid pattern

b)

Match plate pattern

c)

Split pattern

d)

Sweep pattern

14.

Match plate patterns are suitable for

a)

Single casting

b)

Small castings & mass production

c)

Very large castings

d)

Prototype castings

15.

Loose-piece pattern is used when

a)

Simple shape

b)

No draft required

c)

Withdrawal otherwise impossible

d)

Metal is brittle

16.

Machining allowance is provided to

a)

Reduce cost

b)

Improve dimensional accuracy later

c)

Prevent fluidity loss

d)

Avoid riser usage

17.

Which allowance is unpredictable and depends on foundry practice?

a)

Shrinkage

b)

Draft

c)

Shake

d)

Machining

18.

Distortion allowance is provided for

a)

Thin long sections

b)

Heavy castings

c)

Round objects

d)

All ferrous metals

19.

Permeability of moulding sand refers to

a)

Flowability

b)

Gas escape ability

c)

Cohesiveness

d)

Adhesiveness

20.

Green strength is the strength of sand when

a)

Dry

b)

Moist

c)

Heated

d)

Mixed with clay

21.

Blow holes appear due to

a)

High permeability

b)

Low permeability & moisture

c)

Excess alloying

d)

High pouring temperature

22.

Metal penetration defect occurs due to

a)

Fine sand

b)

High binder

c)

Coarse grains

d)

Low pouring rate

23.

Cold shut occurs when

a)

Metal freezes before filling

b)

Core collapses

c)

Sprue is oversized

d)

Pattern is not rapped

24.

Hot tears occur due to

a)

Proper cooling

b)

Residual stresses during solidification

c)

Excess riser

d)

High fluidity

25.

Misrun occurs when

a)

Fluidity is low

b)

Pouring temperature is high

c)

Sand is too fine

d)

Riser is too large

26.

Rolling is generally a ___ process

a)

Cold working

b)

Hot working

c)

Casting

d)

Joining

27.

In rolling, the point where sheet velocity equals roll velocity is called

a)

Slip point

b)

Neutral point

c)

Yield point

d)

Bite point

28.

Forward extrusion causes metal to flow

a)

Opposite to ram motion

b)

Same direction as ram

c)

Sideways

d)

Only upward

29.

Backward extrusion eliminates

a)

Heat

b)

Friction at container walls

c)

Die cost

d)

Ram load

30.

Forging improves material properties mainly due to

a)

Casting

b)

Grain refinement

c)

High cooling rate

d)

Low temperature

31.

Upset forging increases

a)

Length

b)

Cross section

c)

Density

d)

Temperature

32.

Drawing out operation in forging

a)

Reduces length

b)

Increases cross section

c)

Increases length

d)

Creates holes

33.

Wire drawing is always performed as a

a)

Hot working process

b)

Cold working process

c)

Casting process

d)

Joining process

34.

Extrusion is most suitable for

a)

Complex cross sections

b)

Welding large plates

c)

Producing ingots

d)

Finishing operations

35.

Contact length in rolling is proportional to

a)

√(R × Δh)

b)

2πR

c)

R/Δh

d)

(R × Δh)²

36.

Angle of bite in rolling depends on

a)

Friction coefficient

b)

Draft

c)

Roll diameter

d)

All of these

37.

Deep drawing makes

a)

Solid rods

b)

Cup-shaped components

c)

Plates

d)

Bars

38.

Shallow drawing is when cup height is

a)

Equal to diameter

b)

Greater than diameter

c)

Less than half diameter

d)

Zero

39.

Blank diameter depends on

a)

Corner radius

b)

Height

c)

Thickness

d)

All of the above

40.

Sheet metal forming is generally a

a)

Cold working process

b)

Hot working process

c)

Sintering process

d)

Casting process

41.

Electric arc generates heat due to

a)

AC frequency

b)

Ionised gas electrical discharge

c)

Chemical reaction

d)

Mechanical friction

42.

In arc welding, electrode coatings provide

a)

Heat resistance

b)

Mechanical strength

c)

Flux & gas shielding

d)

Color coding

43.

Neutral flame is used for

a)
A) Steel fabrication
b)
C) Low carbon alloys
c)
D) Brass welding
d)
B) General welding
44.

Carburising flame has

a)

Excess oxygen

b)

Excess acetylene

c)

Balanced mixture

d)

No oxygen

45.

Resistance welding heat formula is

a)

H = I²Rt

b)

H = IRt²

c)

H = VIt

d)

H = I/R

46.

In spot welding, nugget forms due to

a)

Pressure only

b)

Heat only

c)

Heat + pressure

d)

Flux

47.

Disc electrodes are used in

a)

Seam welding

b)

Arc welding

c)

TIG welding

d)

Gas welding

48.

Higher resistance at interface in resistance welding causes

a)

Cooling

b)

More heat

c)

Less heat

d)

Lower current

49.

Soldering uses filler metal with melting point

a)

Above 1000°C

b)

Below 450°C

c)

Above base metal

d)

Equal to base metal

50.

Heat in friction welding is generated due to

a)

Chemical reaction

b)

Electric arc

c)

Surface friction

d)

Ultrasonics

51.

In casting, the turbulent flow of molten metal is undesirable because it causes

a)

Faster filling

b)

Oxidation and gas entrapment

c)

Better fluidity

d)

Rapid cooling

52.

A chill is used in moulding to

a)

Increase riser size

b)

Promote directional solidification

c)

Improve core strength

d)

Reduce mould cost

53.

Hot working processes are usually performed

a)

Below recrystallization temperature

b)

Above recrystallization temperature

c)

At room temperature only

d)

Below 100°C

54.

Flash formation occurs in

a)

Rolling

b)

Closed-die forging

c)

Wire drawing

d)

Extrusion

55.

In wire drawing, a larger reduction per pass

a)

Increases die life

b)

Decreases drawing force

c)

Increases drawing force

d)

Produces no change

56.

Deep drawing failure due to excessive thinning at the bottom is known as

a)

Wrinkling

b)

Earing

c)

Necking

d)

Tearing

57.

Arc blow is prominent in

a)

DC arc welding

b)

AC arc welding

c)

Oxy-fuel welding

d)

Resistance welding

58.

TIG welding uses

a)

Non-consumable tungsten electrode

b)

Consumable flux-coated electrode

c)

Bare steel rod

d)

Carbon electrode only

59.

Brazing requires filler material with melting temperature

a)

Higher than base metal

b)

Between 450°C and 800°C

c)

Below 450°C

d)

Exactly equal to base metal

60.

Friction stir welding primarily joins

a)

Only steel

b)

Non-ferrous alloys like aluminium

c)

Plastics

d)

Cast iron only

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