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MD_04

Total questions: 100

Worksheet time: 50mins

Name
Class
Date
1.

The hardness of steel increases if it contains:

a)

Martensite

b)

Pearlite

c)

Austenite

d)

All of the above

2.

How do you call a steel with 0.8% carbon and 100% pearlite?

a)

Austenite

b)

Solidus

c)

Hyper-eutectoid

d)

Eutectoid

3.

What is the range of the tensile strength of common varieties of cast iron?

a)

40-60 MPa

b)

150-180 MPa

c)

850-500 MPa

d)

1500-1650 MPa

4.

Fatigue failure occurs when a part is subjected to:

a)

Compression stress

b)

Tensile stress

c)

Torsional stress

d)

Fluctuating stress

5.

Paramagnetic alpha iron changes to gamma iron at what temperature?

a)

440C

b)

910C

c)

970C

d)

1639C

6.

The diameter of the washer is generally:

a)

Equal to the diameter of the bolt

b)

Slightly more than the diameter of the bolt

c)

Slightly less than the diameter of the bolt

d)

Of any size that suits the application

7.

The compression members tend to buckle in the direction of:

a)

Axis of load

b)

Minimum cross-section

c)

Least radius of gyration

d)

Perpendicular to the axis of the load

8.

A kinematic chain needs a minimum:

a)

2 links and 2 turning pairs

b)

3 links and turning pairs

c)

4 links and 4 turning pairs

d)

3 links and 2 turning pairs

9.

Which of the following pairs is formed if shaft is revolving in a bearing?

a)

Lower pair

b)

Turning pair

c)

Sliding pair

d)

Cylindrical pair

10.

How many links are there in a pantograph?

a)

3

b)

4

c)

.5

d)

6

11.

A pantograph is mechanism having

a)

Lower pairs

b)

Rolling pairs

c)

Spherical pairs

d)

Highest pairs

12.

Which of the following describes the “slip” in belt drive?

a)

Loss in power

b)

Difference between the angular velocities of two pulleys

c)

Difference between linear speed of the rim

d)

Difference between the linear speed of the rim of pulley and the belt on it.

13.

Which of the following is the orientation of the axes of the two shafts in cross helical worm?

a)

Parallel

b)

Non-parallel

c)

Intersecting

d)

Non-parallel and non-intersecting

14.

In case of gears the addendum is given by:

a)

One module

b)

2.16 x module

c)

1.57 x module

d)

1.25 / module

15.

How do you call a cam where in the follower reciprocates or oscillates in a plane parallel to its axis?

a)

Circular cam

b)

Reciprocating cam

c)

Cylindrical cam

d)

Oscillating cam

16.

How are gears for watches generally manufactured?

a)

Die casting

b)

Machining on hobber

c)

Power metallurgy process

d)

Stamping

17.

Rope break dynamometer uses what?

a)

Oil as lubricant

b)

No lubricant

c)

Grease as lubricant

d)

Water as lubricant

18.

Which of the following could be the effect of cold working?

a)

Increases the fatigue strength

b)

Decreases the fatigue strength

c)

Has no influence on fatigue strength

d)

None of these

19.

In testing a material for endurance strength, it is subjected to:

a)

Completely reversed load

b)

.Static load

c)

Impact load

d)

Dynamic load

20.

Coaxing is the procedure of increasing:

a)

Metal strength

b)

Metal hardness by surface treatment

c)

Metal resistance to corrosion by coating

d)

Fatigue limit by overstressing the metal by successively increasing loadings

21.

Up the what percent thickness of plate, edge preparation for welding is not needed?

a)

2mm

b)

4mm

c)

8mm

d)

12mm

22.

Arc blow takes place in:

a)

Gas welding

b)

Arc welding when straight polarity is used

c)

Arc welding when reversed polarity is used

d)

Welding stainless steel

23.

What is the function clutch is the machine tool?

a)

Alignment of drive

b)

Lowering of drive

c)

To insure that two shafts line up at high speed

d)

To connect shaft so that the driven shaft will rotate with the driving shaft and to disconnect them at all

24.

Lowering of drive

a)

Addendum

b)

Dedendum

c)

Top root

d)

Top land

25.

How do you call the distance of the tooth which is equal to the sum of the addendum and dedendum?

a)

Full depth

b)

Working depth

c)

Whole depth

d)

Pitch

26.

Which of the following stresses that independent of loads?

a)

Shear stress

b)

Residual stress

c)

Design stress

d)

Yield stress

27.

Which of the following is not resemble the shape of tool bit?

a)

Thread cutting

b)

Center cutting

c)

Square nose

d)

Round nose

28.

What is the recommended best cutting angle of drill for work on steel or cast iron?

a)

39 degrees

b)

49 degrees

c)

59 degrees

d)

29 degrees

29.

Copper and most of its alloys can be hardened by which of the following?

a)

Cold working

b)

Soaking

c)

Patenting

d)

Case hardening

30.

Types of V-belts to use in a driving pulley with speed of 360 rpm and transmitting 5 Ho.

a)

Type A belts

b)

Type B belts

c)

Type C belts

d)

Type D belts

31.

Which of the following is not an angle measuring device?

a)

Bevel protractor

b)

Sine bar

c)

Combination square

d)

Angle iron

32.

The mould for casting ferrous materials in continuous casting process is made of what materials?

a)

Copper

b)

Medium carbon steel

c)

High carbon steel

d)

Low carbon steel

33.

Clutch slippage while clutch is engaged is especially noticeable:

a)

During idling

b)

A low speed

c)

During acceleration

d)

During braking

34.

In general, to enlarge securely and prevent dragging, what is the clearance between release bearing and release collar in the clutch?

a)

2 – 3 mm

b)

4 – 5 mm

c)

6 – 7 mm

d)

8 – 9 mm

35.

Piston compression rings are made of what materials?

a)

Steel

b)

Bronze

c)

Aluminum

d)

Cast iron

36.

What is the usual value of helix angle of a drill?

a)

120 degrees

b)

110 degrees

c)

60 degrees

d)

30 degrees

37.

What is meant by drossing?

a)

A method od cleaning casting

b)

An inspection method for casting

c)

A method of deoxidation of molten metal

d)

The formation of oxides on the molten metal surface

38.

If the first digit in AISI and SAE, designation is one (1), then it indicates what?

a)

Carbon steels

b)

Nickel steels

c)

Molybdenum steels

d)

Chromium steels

39.

Which of the following where the gear tooth vernier is used to measure?

a)

Module

b)

Gear tooth profile

c)

Gear tooth thickness of gear tooth

d)

Pitch line thickness of gear tooth

40.

A cold chisel is made of what?

a)

Mild steel

b)

German silver

c)

High carbon steel

d)

Cast iron

41.

It is the ability of a material to absorb energy when deformed elastically and to return it when unloaded.

a)

Creep

b)

Fatigue strength

c)

Resilience

d)

Toughness

42.

Which of the following cams where the follower reciprocates or oscillates in a plane parallel to the axis of rotation?

a)

Cam curves

b)

Radial cam

c)

Cylindrical cam

d)

Tangential cam

43.

Which of the following cams where the follower reciprocates or oscillates in a plane perpendicular its axis of rotation?

a)

Tangential cam

b)

Cam curves

c)

Radial cam

d)

Cylindrical cam

44.

During tensile test, which of the following stress-strain curve(s) fits a glass rod?

a)

A straight line

b)

A parabola

c)

An irregular curve

d)

A sudden break

45.

In case of a knuckle joint, the pin is most likely to fall in:

a)

Shear

b)

Tension

c)

Compression

d)

Double shear

46.

A single ply leather belt running at a belt velocity of 300ft/min is likely to transmit per inch of width:

a)

2.5 Hp

b)

3.0 Hp

c)

4.0 Hp

d)

5.0 Hp

47.

At what temperature range where ferromagnetic alpha iron exists?

a)

Below 723C

b)

700 – 910C

c)

1000 – 1440C

d)

Above 1539C

48.

How do you call a body having identical properties all over?

a)

Heterogeneous

b)

Homogeneous

c)

Elastic

d)

Ductile

49.

How is the material described if it recovers its original dimensions when the load is removed?

a)

Elastic

b)

Plastic

c)

Brittle

d)

Malleable

50.

What is the percentage of carbon in Eutectoid steel?

a)

0.02%

b)

0.30%

c)

0.63%

d)

0.80%

51.

The presence of sulphur in pig iron makes:

a)

The casting unsound

b)

It brittle

c)

It hard

d)

It is easy machinable

52.

What is the effect of alloying zinc to copper?

a)

Increase hardness

b)

Impart free machining properties

c)

Improve hardness and strength

d)

Increase strength and ductility (if added up to 10 – 30 %

53.

The imperfection in the crystal structure of metal is:

a)

Impurity

b)

Fracture slip

c)

Slip

d)

Dislocation

54.

When is the pressure release in resistance welding?

a)

After the weld cools

b)

During heating period

c)

After completion of current

d)

Just as the time of passing the current

55.

If it is the thickness of sheet to be spot welded, then electrode tip diameter is equal to _______.

a)

t2t^2

b)

2t2\sqrt{t}

c)

t\sqrt{t}

d)

1.5t1.5\sqrt{t}

56.

A twist drill specified by which of the following?

a)

Its shank and diameter

b)

Shank, material and flute size

c)

The diameter and lip angle

d)

Shank, material and diameter

57.

Which of the following is used to measure the clearance between the value and tappet of an automobile engine?

a)

Shape gauge

b)

Slip gauge

c)

Feeler gauge

d)

Vernier scale

58.

Speedometer drive is generally taken from:

a)

Gear box

b)

Fan belt

c)

Flywheel

d)

Frontwheel

59.

What is the usual percentage of cut on the return stroke of hacksaw blade?

a)

0

b)

5

c)

7

d)

9

60.

Which of the following will best describe sunk key?

a)

The keyway is helical along shaft

b)

The keyway is cut in shaft only

c)

The keyway is cut in hub only

d)

The key is cut in both shaft and hub

61.

Which of the following where turn buckle has?

a)

Left hand threads on one end and right hand threads on other end

b)

Right hand threads on both ends

c)

.Left hand threads on both ends

d)

No threads

62.

Which of the following is the best process for butt welding of two plates each of which is 25 mm thread?

a)

Electro slag welding

b)

Gas welding

c)

Submerged arc welding

d)

Steam welding

63.

Which of the following statement(s) is correct for an oilless bearing:

a)

The oil film is maintained by supplying oil under pressure

b)

The oil film pressure is produced only by rotation of the journal

c)

Do not need external supply of lubricant

d)

Grease is needed to be applied after some intervals

64.

The working load P for a chain for crane applications is expressed in terms of diameter of link “d” in cm as follows.

a)

P=1.5d2P=1.5d^2

b)

P=25d2P=25d^2

c)

P=50d2P=50d^2

d)

P=500d2P=500d^2

65.

The column splice is used for increasing:

a)

Cross-sectional area of the column

b)

Length of the column

c)

Strength of the column

d)

All of the above

66.

At what temperature that Gamma iron exist?

a)

Between 910C and 1400C

b)

Between 1400C and 1539C

c)

Near melting point

d)

Room temperature

67.

The behaviour of metals where in strength of a metal is increased and the ductility is decreased on heating at a relatively low temperate after cold working is called:

a)

Clustering

b)

Twinning

c)

Screw dislocation

d)

Strain aging

68.

Which of the following statement(s) is correct in “carbon steel castings”?

a)

The percentage carbon is less than 1.7%

b)

The percentage carbon is between 1.7% - 2%

c)

The percentage for alloying elements is controlled

d)

None of the above

69.

Aluminum alloys for pressure die castings:

a)

Must not be free form hot shortness

b)

Must have iron as one of the constituents

c)

Must not posses considerable fluidity

d)

Must be light

70.

Which of the following is maximum in 18-4-1 high speed steel?

a)

Tungsten

b)

Chromium

c)

Argon

d)

Iron

71.

Super conductors:

a)

Exist at temperature below 10K

b)

Are the dense metals without voids

c)

Are non-metallic substances

d)

Are the purest forms of metals

72.

When large number of components are turned and parted off from a bar, the chuck generally used is:

a)

Two jaw chuck

b)

Four jaw chuck

c)

Collet chuck

d)

Magnetic chuck

73.

Cutting speed for some materials are as under which one of the following could be cutting speed for brass?

a)

30 m/min

b)

40 m/min

c)

80 m/min

d)

50 m/min

74.

If V is the volume of metal in casting and A is its surface area, then the time of solidification will be proportional to:

a)

V2,1AV^2,\frac{1}{A}

b)

1(V2),A2\frac{1}{\left(V^2\right)},A^2

c)

V,1(A2)V,\frac{1}{\left(A^2\right)}

d)

V2,1(A2)V^2,\frac{1}{\left(A^2\right)}

75.

The draft allowance on metallic pattern as compared to wooden ones is:

a)

More

b)

Same

c)

Less

d)

More or less depending on size

76.

Arc metal patterns are used for:

a)

Precision castings

b)

Small castings

c)

Large castings

d)

Large scale production castings

77.

What tool is used in foundry for repairing the mould?

a)

Swab

b)

Gagger

c)

Bellows

d)

Rammer

78.

What tool is used in foundry for smoothening and cleaning out depression in the mould?

a)

Swab

b)

Gagger

c)

Bellows

d)

Rammer

79.

Which of the following does not have to be lubricated when drilling?

a)

Brass

b)

Steel

c)

Monel

d)

Mild steel

80.

The tool used in precision work to smooth or enlarge holes is called a:

a)

Round out

b)

Drift pin

c)

Reamer

d)

Protractor

81.

When a measuring a dill for size, measure across the:

a)

Margins

b)

Flutes

c)

Shank

d)

Point

82.

How do you call the tool used for cleaning files?

a)

File cleaner

b)

File card

c)

File oilstone

d)

Scraper

83.

The melting point of babbit is approximately:

a)

1000 F

b)

650 F

c)

750 F

d)

500 F

84.

How is tubing measured?

a)

Inside diameter

b)

Outside diameter

c)

Thickness of wall

d)

Wire gage

85.

Which of the following metals will respond to heat treatment?

a)

Cast iron

b)

Wrought iron

c)

Medium carbon steel

d)

Low carbon steel

86.

The ability of metal to withstand loads without breaking down is:

a)

Stress

b)

Strength

c)

Strain

d)

Elasticity

87.

Which of the following metals is non-magnetic?

a)

Cast iron

b)

Alloy steel

c)

Cast steel

d)

Manganese steel

88.

A machining operation whereby the tool reciprocates and the feed is stationary

a)

Planing

b)

Shaping

c)

Turning

d)

Reaming

89.

Which of the following is not a tap used for cutting threads in holes?

a)

Tapping tap

b)

Plug tap

c)

Taper tap

d)

Bottoming tap

90.

Herringbone gears are gears which:

a)

Do not operate on parallel shafts

b)

Have a line contact between the teeth

c)

Consists of two left handed helical gears

d)

Tend to produce thrust on the shafts

91.

Which of the following statements is true for the internal stresses existing in a welded connection?

a)

Internal stresses are not relieved by heat treatment

b)

Internal stresses are not relieved when weld is peened

c)

internal stresses may be relieved when weld is peened

d)

Internal stresses are relieved by x-ray analysis

92.

Stainless steel is obtained principally by the use of which of the alloying elements?

a)

Chromium

b)

Nickel

c)

Carbon

d)

Tungsten

93.

Galvanized iron is a term referring to iron coated with:

a)

Tin

b)

Zinc

c)

Magnesium

d)

Aluminum

94.

Which of the following is not a common term relating to the classification of fits?

a)

Tunking

b)

Snug

c)

Medium force fit

d)

Bound

95.

In usual spur gearing, which of the following statement(s) is correct?

a)

Pitch circle and base circle are the same

b)

Working depth includes the clearance

c)

Tooth profile are usually involute curves

d)

Tooth profile are usually cycloidal curves

96.

In general, the design stress and factor of safety are related as follows:

a)

Design stress = Ultimate stress times factor of safety

b)

Design stress = Ultimate stress divided by factor of safety

c)

Factor of safety = Design stress divided by design stress

d)

Ultimate stress = factor of safety divided by design stress

97.

In usual spur gearing the:

a)

Pitch circle and base circle are the same

b)

Working depth includes clearance

c)

Tooth outline are always cycloidal curves

d)

Tooth outline are always involute curves

98.

Which of the following is the not the other name of circumferential stress for thin walled cylinder.

a)

Hoop stress

b)

Girth stress

c)

Tangential stress

d)

Longitudinal stress

99.

How do you call the ratio of the volumetric stress to volumetric strain?

a)

Modulus in shear

b)

Stress to strain ratio

c)

Volumetric ratio

d)

Bulk's modulus

100.

Herringbone gears are gears which:

a)

Do not operate parallel shafts

b)

Have a line contact between the teeth

c)

Tend to produce and thrust on the shafts

d)

Consists of two left handed helical gears