SECTION-3

##### Q51. The design of a pressure vessel, having thin walls, is based on

(a) longitudinal stress
(b) hoop stress
(c) both (a) and (b)
(d) none of the above.

Ans:(b) hoop stress

(a) 2.0 cm
(b) 1.75 cm
(c) 1.50 cm
(d) 1.25 cm.

Ans:(d) 1.25 cm.

##### Q53. Which one of the following equations is used in the design of thick cylinders?

(a) Lame’s equation
(b) Clavarino’s equation
(c) Barlow’s equation
(d) any one of the above

Ans:(d) any one of the above

(a) 4 cm
(b) 5 cm
(c) 6 cm
(d) 7 cm.

Ans:(c) 6 cm

(a) 4 cm
(b) 6 cm
(c) 8 cm
(d) 10 cm.

Ans:(c) 8 cm

##### Q56. The spigot and socket joint is mostly used for pipes which

(a) carry steam at high pressure
(b) carry water at low pressure
(c) are burried in the earth
(d) carry fluid at high pressure.

Ans:(c) are burried in the earth

##### Q57. The hydraulic pipe joint is mostly used for pipes which

(a) carry steam at high pressure
(b) carry water at low pressure
(c) are hurried in the earth
(d) carry fluid at high pressure.

Ans:(d) carry fluid at high pressure.

##### Q58. If the ratio of allowable stress to the fluid pressure inside the pipe is more than 6.0, then thickness of the pipe is given by

(a)p ×d/2f    + C
(b)p× d/4×f   + C
(c) 2p ×d/f  +C
(d)2p+d/3f  + C.
where p = Internal fluid pressure, d = Internal diameter of pipe
f = Allowable stress in the pipe material, and
C = A constant which is equal to 0.9 for a cast iron pipe and = 0.3 for a steel pipe.

Ans:(a)p ×d/2f    + C

##### Q59. The stress induced in a thin cylinder (subjected to internal fluid pressure) parallel to the axis of the cylinder is

(a) two times the circumferential stress
(b) equal to the circumferential stress
(c) one-half of the circumferential stress
(d) one-third of the circumferential stress.

Ans:(c) one-half of the circumferential stress

##### Q60. The loose knuckle pin in the fork will be subjected to

(a) shearing
(b) bending
(c) crushing
(d) tearing.

Ans:(b) bending

1      2      3          5      6          8

DEAR READERS IF YOU FIND ANY ERROR/TYPING MISTAKE PLEASE LET ME KNOW IN THE COMMENT SECTIONS OR E-MAIL: [email protected]

##### Read More Sections of Machine Design

Each section contains maximum 80 Questions. To practice more questions visit other sections.

Machine Design MCQ – Section-1

Machine Design MCQ – Section-2

Machine Design MCQ – Section-3

Machine Design MCQ – Section-4

Machine Design MCQ – Section-5

Machine Design MCQ – Section-6

Machine Design MCQ – Section-7