Strength of Materials Handout (Objectives) Flashcards
What is the equivalent unit of “pascal”?
A. N/m
B. N-m
C. N-m2
D. N/m2
N/m2
What refers to a slender member which prevents parts of a structure moving to each other under compressive force?
A. Tie
B. Column
C. Arch
D. Strut
Strut
The simple mathematical statement of the relationship between elastic stress and strain: stress is proportional to strain. What is this law?
A. Boyle’s Law
B. Hooke’s Law
C. Charle’s Law
D. Gas Law
Hooke’s Law
Hooke’s law holds good up to
A. yield point
B. elastic limit
C. plastic limit
D. limit of proportionality
limit of proportionality
What is the definition of normal strain, ε? (δ is elongation, and L is the length.)
A. ε = (L + δ) / L
B. ε = (L + δ) / δ
C. ε = δ / (L + δ)
D. ε = δ / L
ε = δ / L
What is the unit of strain?
A. Pa
B. unitless
C. N-m
D. N-m/s
unitless
The unit of Young’s modulus is
A. mm/mm
B. kg/cm
C. kg
D. kg/cm^2
kg/cm^2
The maximum bending moment in a simple supported beam of span L and carrying a concentrated load “W” at beam’s midpoint.
A. WL
B. WL/2
C. WL/4
D. 2WL
WL/4
The maximum bending moment of a beam simply supported at the both ends and subject to a total load W uniformly distributed over its length L is expressed by the formula.
A. WL/8
B. WL²/8
C. WL/2
D. WL/4
WL/8
What is the maximum moment of a beam supported at both ends and carries a uniform load of w throughout its entire length?
A. wL/8
B. wL2/4
C. wL/2
D. wL2/8
wL2/8
The modulus of rigidity of a steel member is _______.
A. defined as the length divided by the moment of inertia
B. defined as the unit shear stress divided by the unit shear deformation
C. equal to the modulus of elasticity divided by one plus Poisson’s ratio
D. a function of the length and depth
defined as the unit shear stress divided by the unit shear deformation
Which treatment will result in an increase in the fatigue strength of the steel?
A. Shot peening
B. Annealing
C. Cold working
D. Surface roughening
Shot peening
Under which of the following type of loading does fatigue occur?
A. repeated load
B. plane load
C. static load
D. high load
repeated load
A thin mild steel wire is loaded by adding loads in equal increments until it breaks. The extensions noted with increasing the loads will behave as under
A. uniform throughout
B. first increase then decrease
C. increase uniformly
D. increase uniformly first and then increase rapidly
increase uniformly first and then increase rapidly
At any point on the circumference of a cylinder, the longitudinal and hoop stress are
A. parallel
B. equal
C. orthogonal
D. radial
orthogonal
What is the generic name of the class of polymer which is commercially known as nylon?
A. polyacetals
B. polyamide
C. cellulose
D. polyester
polyamide
