This set of Strength of Materials Multiple Choice Questions & Answers (MCQs) focuses on “Stress due to Materials Used and Their Applications”.
1. Which test is conducted to measure the ability of a material to resist scratching, abrasion, deformation and indentation?
a) Creep test
b) Fatigue test
c) Hardness test
d) Compression test
View Answer
Explanation: The ability of a material to resist scratching, abrasion, deformation and indentation is called hardness. So to measure this hardness test is used. it is generally expressed by Brinell, Rockwell or Vickers hardness numbers.
2. Which test is conducted to measure the endurance limit of the material?
a) Creep test
b) Fatigue test
c) Compression test
d) Hardness test
View Answer
Explanation: The fatigue test is used to design components subjected to varying load. It experimentally determines the endurance limit of the material.
3. What is the process in which the metal is cooled rapidly in water after heating the metal above the lower critical temperature to increase the hardness of the material?
a) Quenching
b) Tampering
c) Hardening
d) Annealing
View Answer
Explanation: Quenching is the process in which the metal is cooled rapidly in water after heating the metal above the lower critical temperature to increase the hardness of the material. Hardness is achieved during the quenching process depends on the amount of carbon content and cooling rate.
4. What is the process of heating the metal in the furnance to a temperature slightly above the upper critical temperature and cooling slowly In the furnance.
a) Quenching
b) Tampering
c) Annealing
d) Normalizing
View Answer
Explanation: Annealing is the process of heating the metal in the furnance to a temperature slightly above the upper critical temperature and cooling slowly In the furnance. It produces an even grain structure, reduces hardness and increases ductility usually at a reduction of strength.
5. Photo stress method is ___________
a) Stress analysis method
b) Creep test
c) Ultra violet test
d) None of the mentioned
View Answer
Explanation: Photo stress is a widely used full field technique for accurately measuring surface strains to determine the stresses in a part or structure during static of dynamic testing.
6. What is the factor of safety?
a) The ratio of total stress to the permissible stress
b) The ratio of ultimate stress to the permissible stress
c) The ratio of ultimate stress to the applied stress
d) The ratio of ultimate stress to the modulus of elasticity
View Answer
Explanation: The ratio of ultimate stress to the permissible or working stress is called the factor of safety. This factor of safety is kept in mind in designing any structure.
7. Which one of the following has the largest value of thermal coefficient?
a) Brass
b) Copper
c) Steel
d) Aluminium
View Answer
Explanation: Aluminium has the large value of thermal coefficient among them of value 24 x 10-6. whereas brass and copper has 19×10-6 and 17×10
8. Identify which factor may cause a lowered body temperature:
a) Infection
b) Stress
c) Shock
d) Exercise
View Answer
Explanation: Shock can cause the body temperature to drop, and so the cause of shock must be found. Other factors that can cause a lowered body temperature include: very young/old, serious haemorrhage, recovery from anesthesis and poisons.
Sanfoundry Global Education & Learning Series – Strength of Materials.
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