M5 Flashcards
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
B
Distortion Energy Theory is also known
as ________ Theory.
A. Coulomb-Mohr
C. Maximum Shear Stress
B. Maximum Normal Stress
D. Von Mises
D
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
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
C
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
D
Under which type of loading does
fatigue occur?
A. Repeated load C. Plane load
B. High load D. Static load
A
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
C
Fillet is used in gears to:
A. Increase load factor
B. Increase tangential force
C. Reduce concentration factor
D. Reduce tensile strength
C
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
B
The number of cycles required to cause failure
for given stream level.
A. Endurance C. Fatigue life
B. Fatigue D. Rupture
C
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
D
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
D
What is the other term for the Maximum-
Shear-Stress Theory, as a failure prediction theory?
A. Coulomb-Mohr theory C. Tresca yield criterion
B. Modified Mohr theory D. Von Mises criterion
C
What percentage of engineering failures are
fatigue failures?
A. 60 C. 80
B. 70 D. 90
C
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
C
