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IKING > M5 > Flashcards

M5 Flashcards

1
Q

Which of the following is the ratio of the
fatigue strength without a stress concentration to the
fatigue stress with a stress concentration?
A. Factor of safety
B. Fatigue stress concentration factor
C. Reliability factor
D. Wahl’s factor

A

B

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2
Q

Distortion Energy Theory is also known
as ________ Theory.
A. Coulomb-Mohr C. Maximum Shear Stress
B. Maximum Normal Stress D. Von Mises

A

D

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3
Q

The surface hardening is desirable for
a product that is subject to:
A. Fatigue C. High impact loads
B. High shear load D. High tensile load

A

A

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4
Q

Which of the following occurs whenever
there is a discontinuity or non-uniformity in an object?
A. Stress concentration factor
B. Extreme shear stress
C. Geometric stress concentration
D. Fatigue Stress concentration

A

C

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5
Q

) Fillet radius in machine parts is usually
introduced to:
A. Avoid obstruction
B. Improve the look of the parts
C. Necessary lessen casting weights
D. Reduce the concentration of stress and extend the life
of the parts

A

D

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6
Q

Under which type of loading does
fatigue occur?
A. Repeated load C. Plane load
B. High load D. Static load

A

A

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7
Q

Peening is a cold working process in steel
materials that tends to _______ its properties.
A. Make it more ductile C. Harden
B. Make it more malleable D. Oxidize

A

C

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8
Q

) Fillet is used in gears to:
A. Increase load factor
B. Increase tangential force
C. Reduce concentration factor
D. Reduce tensile strength

A

C

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9
Q

A final operation to improve the polish of a
metal and to bring out the maximum luster.
A. Broaching C. Finishing
B. Buffing D. Surface grinding

A

B

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10
Q

The number of cycles required to cause failure
for given stream level.
A. Endurance C. Fatigue life
B. Fatigue D. Rupture

A

C

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11
Q

This is a shaper operation, which is shaping
the given stock and having the excess material remain with
a tolerable allowance for finishing.
A. Angular cutting C. Finishing
B. Contouring D. Roughing

A

D

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12
Q

This is a theory in cyclic and impact loading,
which states that damage at any stress level, is proportional
to number of cycles
.A. Basquin’s equation C. Coffin-Manson formula
B. Goodman relation D. Miner’s rule

A

D

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13
Q

What is the other term for the MaximumShear-Stress Theory, as a failure prediction theory?
A. Coulomb-Mohr theory C. Tresca yield criterion
B. Modified Mohr theory D. Von Mises criterion

A

C

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14
Q

What percentage of engineering failures are
fatigue failures?
A. 60 C. 80
B. 70 D. 90

A

C

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15
Q

The internal stresses that exist in any part of
the temperature and not acted upon an external load.
A. Control stresses C. Residual stresses
B. Form stresses D. Superposed stresses

A

C

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16
Q

What is the other term for the maximumShear stress Theory (MSST) as a failure prediction Theory?
A. Coulomb-Mohr Theory C. Tresca-Yield Criterion
B. Modified Mohr Theory D. Von Mises Criterion

A

C

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17
Q

Von Mises theory is the other term used for:
A. Energy distortion theory
B. Maximum principal stress theory
C. Maximum shear-stress theory
D. Octahedral shear-stress theory

A

A

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18
Q

A part subjected to any combination of loads will fail (by
yielding or fracturing) whenever the maximum shear stress
exceeds a critical value.
A. Distortion-Energy Theory C. Modified Mohr Theory
B. Max. Shear Stress Theory D. Principal Stress Theory

A

B

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19
Q

It is a measure of the ease with which a crack progresses
through a material from an existing notch, crack, or sharp
corner.
A. Brittleness C. Mohs Scale
B. Creep Rate D. Notch sensitivity

A

D

20
Q

Which of the following is another name of radius gauge?
A. Ring gauge C. Planer gauge
B. Fillet gauge D. Plug gauge

A

B

21
Q

Which of the following is not suitable for impact loads?
A. Cast iron C. HSS steel
B. Chrome steel D. Mild steel

A

A

22
Q

Which of the following is not suitable for impact loads?
A. Cast iron C. HSS steel
B. Chrome steel D. Mild steel

A

C

23
Q

The phenomenon of decreased resistance of the materials
to fluctuating stresses is the main characteristic of:
A. Fatigue C. Impact
B. Fracture D. Yielding

A

A

24
Q

It is the total strain energy stored in a body.
A. Impact energy C. Proof resilience
B. Modulus of resilience D. Resilience

A

D

25
Q

Under steady or _______ loading, a machine part made of
ductile material fails by yielding.
A. Pulsating C. Reversed
B. Repeated D. Static

A

D

26
Q

According to principal stress theory, which option
represents the correct relation between yield strength in
shear and the yield strength in tension?
A. 𝑆𝑦𝑠 = 0.5𝑆𝑑𝑠 C. 𝑆𝑦𝑠 = 0.577𝑆𝑑𝑠
B. 𝑆𝑑𝑠 = 0.5𝑆𝑦𝑠 D. 𝑆𝑑𝑠 = 0.577𝑆𝑦�

A

A

27
Q

Which of the following property is desirable in parts
subjected to shock and impact loads?
A. Brittleness C. Strength
B. Stiffness D. Toughness

A

D

28
Q

The theory of failure was first proposed by _______.
A. Coulomb C. Mohr
B. Von Mises D. St. Venant

A

A

29
Q

The Von Mises and Tresca criteria give different yield stress
for ________.
A. Uni-axial stress C. Pure shear stress
B. Balanced bi-axial stress D. All of these

A

C

30
Q

If the mean stress value for a sinusoidal stress function is
zero, then this type of stress falls in which category?
A. Fluctuating Stresses C. Alternating Stresses
B. Repeated Stresses D. Reversed Stresses

A

D

31
Q

By default, for any corner, the radius of fillet is: _____.
A. 0 C. 1/8β€³
B. 1/16β€³ D. 3 mm

A

A

32
Q

The stress represented by cos 𝑑 belongs to which category?
A. Fluctuating Stresses C. Alternating Stresses
B. Repeated Stresses D. Reversed Stresses

A

D

33
Q

The stress represented by (1 + sin 𝑑) belongs to which
category?
A. Fluctuating Stresses C. Alternating stresses
B. Repeated Stresses D. Reversed stress

A

B

34
Q

The curve found by plotting the normal and shear stresses.
A. Coulomb’s envelope C. Strength envelope
B. Mohr’s envelope D. Stress envelope

A

C

35
Q

The stress represented by (1.5+ sin 𝑑) belongs to which
category?
A. Fluctuating Stresses C. Repeated Stresses
B. Reversed Stresses D. None of these

A

A

36
Q

The stress represented by (cos 𝑑 + Ο€/2) belongs to which
category?
A. Alternating Stresses C. Reversed Stresses
B. Reversed Stresses D. None of these

A

A

37
Q

Which one of the following is the most conservative fatigue
failure criterion?
A. Soderberg C. Modified Goodman
B. ASME Elliptic D. Gerber

A

A

38
Q

The fatigue life of a part can be improved by this.
A. Heat treatment C. Hot working
B. Shot peening D. Electroplating

A

B

39
Q

Guest’s theory of failure is applicable for following type of
materials:
A. Brittle C. Elastic
B. Ductile D. Plastic

A

B

40
Q

A metallic material that does not show a fatigue limit.
A. Aluminum C. Stainless steel
B. High Strength Steel D. Titanium alloys

A

A

41
Q

A hot short metal is ______.
A. Brittle when cold C. Hard when hot
B. Brittle when hot D. None of the above

A

B

42
Q

The edges of boiler plates for fullering and caulking are
beveled at an angle of:
A. 60Β° C. 80Β°
B. 70Β° D. 90Β°

A

C

43
Q

Fatigue failures occur on stresses _________.
A. Above fracture strength C. Below elastic limit
B. Above tensile strength D. Below tensile strength

A

C

44
Q

Impact load results from which type of effects of loads
applied?
A. Dynamic C. Both A and B
B. Static D. Neither A nor B

A

A

45
Q

Resilience of a material is important, when it is subjected to:
A. Combined load C. Shock load
B. Fatigue load D. Wear load

A

C

46
Q

The critical shear stress causing failure of material depends
upon the _______.
A. Material’s properties and normal stress on the plane
B. Intermediate principal stress
C. Both A and B
D. Neither A nor B

A

A

47
Q

The property of a material which enables it to resist fracture
due to high impact loads is also known as:
A. Elasticity C. endurance
B. Strength D. toughness

A

D

IKING (9 decks)

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