SOM - Strength of Materials

SOM - Strength of Materials
Question:-
Option (A)
10 MPa, 100 MPa
Option (B)
100 MPa, 10 MPa
Option (C)
20 MPa, 200 MPa
Option (D)
200 MPa, 20 MPa
Correct Option:
A
Question Solution:
Δ=Δ1 + Δ2 => 0= => 0=3P1 + 0.3P1 - 64.8 => 64.8=3.3 P1 => P1=19.64 kN therefore, P1 + P2=216 therefore, P2=216 - 19.64 = 196.36 kN therefore, Stress in region (1), σ1= = 10 MPa and stress in region (2), σ2=
Question:-
Option (A)
span of beam is increased
Option (B)
moment of inertia is increased
Option (C)
select a material which is having less value of modulus of elasticity
Option (D)
increase the magnitude of load
Correct Option:
B
Question Solution:
=M(x) y= y∝
Question:-
Option (A)
75%
Option (B)
99%
Option (C)
94%
Option (D)
90%
Correct Option:
C
Question Solution:
A Pe= = == = (0.5)4 therefore, % loss = =[1 - (0.5)4] x 100 =93.75 ~ 94%