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Strength of material part -4

Strength of material part -4
Question:-
Option (A)
decrease
Option (B)
increase
Option (C)
remain same
Option (D)
becomes equal to ultimate tensile strength
Correct Option:
B
Question Solution:


Question:-
Option (A)
G = 2K
Option (B)
G = E
Option (C)
K = E
Option (D)
G = K = E
Correct Option:
C
Question Solution:

E=2G(1 + µ) = 3K(1 - 2µ)
=
The value of μ must be between 0 to 0.5. So E never equal to G but if μ = 1/3 then E = K.
Question:-
Option (A)
20/3 kN, 10/3 kN
Option (B)
10/3 kN, 20/3 kN
Option (C)
5 kN, 5 kN
Option (D)
6 kN, 4 kN
Correct Option:
A
Question Solution:

Elogation in AC = Length reduction in CB
=
andRA + RB=10
RA=2RB
3RB=10
RB=
RA=