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Important Question Mechanical Engineering
Q1. The property of material ,which enables it to withstand bending , without fracture , is know as
- Mechanical strength
- Stiffness
(c ) flexural rigidity
(d) Ductility
Ans. C
Q2. Which ingredient is responsible for corrosion resistant capability in Stainless Steel ?
- Iron
- chromium
(c ) Zinc
(d) Sulphur
Ans. B
Q3. Babbit meta is an alloy of which one of the following ?
- Lead and Tin
- Lead and Magnesium
(c ) Tin and Bismuth
(d) None of the above
Ans. A
Q4. When mechanical properties of a material remain same in all directions at each point, such a material is called
- Isotropic
- Homogeneous
(c ) Orthotropic
(d ) Anisotropic
Ans. A
Q5. Bronze contains
- Cu % and Zn 30% / 70 %
- Cu 90% and Zn10%/ 90%
(c )Cu 75% and Zn 25%/ 75%
(d) None of these
Ans. B
Q6. If a material expands freely due to heating , it will develop :
- Thermal stresses
- Tensile stresses
(c ) Compressive stresses
(d ) No stresses
Ans. D
Q7. Which one of the following has the highest value of specific stiffness ?
- Steel
- Aluminium
(c ) Fibre glass
(d) Carbon fibre composite
Ans. A
Q8. Which element makes stainless steel corrosion resistant ?
- Vanadium
- Chromium
(c ) Carbon
(d) Sulphur
Ans. B
Q9. The process of formation of new grains on heating metals is called
- Recrystallization
- Oxidation
(C )Microstructure
(d) Hardening
Ans. A
Q10. Which of the following has maximum ductility ?
- Copper
- Mild Steel
(c ) Cast Iron
(d ) 18-4-1 Steel
Ans. A
