engineering recuitment BMC Sub Engineer Mock Test 2024 Strength of Materials Springs Closed Coil Helical Spring Under Axial Pull
Read the following statements and choose the correct combination of statements.
Statement A: Brinnel hardness number formula is \(2P\over \pi^2D[D-\sqrt{D^2-d^2}]\), Where P is the standard load, D is the diameter of the steel ball (mm), and d is the diameter of the indent (mm).
Statement B: Brinnel hardness test is used to check the toughness of the material.
Statement C: When spring is cut into two parts its stiffness becomes double for every individual part.
Statement D: Thermal stress and strain in metal are directly proportional to temperature or change in temperature.
1
(A)-True, (B)-True, (C)-False, (D)-False
2
(A)-True, (B)-True, (C)-True, (D)-False
3
(A)-True, (B)-False, (C)-True, (D)-True
4
(A)-False, (B)-False, (C)-True, (D)-True
5
(A)-False, (B)-False, (C)-False, (D)-True