A round steel rod of 100 mm diameter is bent into an arc of radius 100 m. What is the maximum stress in the rod? Take E = 2×105 N/mm2.
a. 100 N/mm2
b. 200 N/mm2
c. 10 × 105 N/mm2
d. 20 × 105 N/mm2
Electrical resistance wire strain gauge has an advantage that it is of low cost.
Select one:
True
False
A column fails at a buckling load of 8 kN when both ends are fixed. If both the fixed ends are replaced by hinged ends, calculate the buckling load of the column.
a. 8 kN
b. 2 kN
c. 4 kN
d. 16 kN
Buckling is the only way for the failure of columns.
Select one:
True
False
In Rankine's column formula, the constant 'a' is given by σc/π^2E. (Where, E - Young's modulus, σc - compressive stress)
Select one:
True
False
Calculate the modulus of section of a rectangular beam of breadth 240 mm and height 400 mm.
a. 12.8 × 106 mm3
b. 7.68 × 106 mm3
c. 6.4 × 106 mm3
d. 3.84 × 106 mm3
The extension of a 2 m long bar due to temperature rise is 1 mm. What will be the thermal strain?
a. 10 × 10^-3
b. 2 × 10^-3
c. 5 × 10^-4
d. 3 × 10^-4