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MCQ
28201. If a material expands freely due to heating it will develop- [PPA-19]
thermal stresses
no stresses
tensile stress
bending
28203. The materials having same elastic properties in all directions are called- [PPA-19]
ideal materials
isotropic materials
elastic materials
uniform materials
28204. The stress developed in the material without any permanent set is called. [MES-18]
elastic limit
breaking point
yield point
ultimate point
28205. If two forces of 3kg and 4kg act at right angles to each other, their resultant force will be- [MOCA-19]
7kg
14kg
5kg
7kg
28206. The ultimate tensile stress for mild steel is - the ultimate compressive stress. [MES-18]
equal to
more than
less than
none of these
28207. Young's modulus is the property of- [PPA-19]
Gas only
Solid only
Liquid and solid
Liquid only
28208. The unit of force in S.I. system of units is- [BB-20, BADC-18, MOD-20]
Dyne
Watt
Newton
Kilogram
28209. The polar moment of inertia of a solid circular shaft of diameter (D) is- [MOD-20]
πd³/16
πd³ /32
πd4/64
πd4/32
28210. If the resultant of two equal force has the same magnitude as either of the force, then the angle between the two forces is- [BADC-18]
30°
120°
60°
90°
28211. A material capable of absorbing large amount of energy before fracture is known as- উত্তর (PPA-19)
ductility
shock proof
toughness
resilience
28213. The poisson's ratio for steel varies from- [BREB-17; MES-18]
0.22 to 0.27
0.32 to 0.42
0.25 to 0.33
0.31 to 0.34
28215. Deformation per unit length in the direction of force is known as- [PPA-19]
Strain
Lateral strain
Linear strain
Stress
28217. Two forces of 6 and 8kg act at right angles to each other, the resultant force will be- [PPA-19]
10
14
41
28
28218. The highest value of specific heat is found in- [PPA-19]
Alcohol
Kerosene
Methane
Water
28219. Which of the following materials is most elastic? [PPA-19]
rubber
steel
plastic
brass
28220. The resultant of two forces P & Q (Such that P > Q) acting along the same straight line but in opposite direction is given by- [MOD-20]
P+Q
P-Q
P/Q
Q/P