# Design of Cylinders - Mechanical Engineering (MCQ) questions and answers

1)   Which of the following principle recognizes human capabilities and limitations using design effective handling equipment?

a. Safety principle
b. Obsolescence principle
c. Ecology principle
d. Ergonomic principle
 Answer  Explanation ANSWER: Ergonomic principle Explanation: No explanation is available for this question!

2)   What does DFMA stand for?

a. Design for Manual Assembly
b. Design for Manufacture and Assembly
c. Both a. and b.
d. None of the above
 Answer  Explanation ANSWER: Both a. and b. Explanation: No explanation is available for this question!

3)   A cylinder made of plain carbon steel has inner diameter 100 mm. What is the thickness of cylinder if maximum internal pressure of 20 Mpa acts on it? ( σall = 100 N/mm2 & poisson's ratio = 0.3)

a. 11 mm
b. 15.36 mm
c. 22.32 mm
d. 80 mm
 Answer  Explanation ANSWER: 11 mm Explanation: No explanation is available for this question!

4)   The ratio of di / t  for thick cylinder is  __________
(where  di = inner diameter, t = wall thickness)

a. greater than 20
b. less than 20
c. equal to 20
d. none of the above
 Answer  Explanation ANSWER: less than 20 Explanation: No explanation is available for this question!

5)   Which criteria of failure is used to indicate St Venent's theory?

a. Maximum principle stress theory
b. Maximum principle strain theory
c. Shear stress theory
d. None of the above
 Answer  Explanation ANSWER: Maximum principle strain theory Explanation: No explanation is available for this question!

6)   Which equation is used to determine wall thickness for brittle materials?

a. Brinie's equation
b. Claviro's equation
c. Lame's equation
d. All of the above
 Answer  Explanation ANSWER: Lame's equation Explanation: No explanation is available for this question!

7)   Claviro's equation is applicable to cylinders with _______

a. close ends
b. open ends
c. both a. and b.
d. none of the above
 Answer  Explanation ANSWER: close ends Explanation: No explanation is available for this question!

8)   Due to which effect, compressive residual stress of strain-hardening model is smaller than elastic-perfectly plastic model?

a. Seeback effect
b. Peltier effect
c. Bauschinger effect
d. None of the above
 Answer  Explanation ANSWER: Bauschinger effect Explanation: No explanation is available for this question!

9)   Why is autofrettage process used in pressure vessels?