Top 550+ Solved Machine Design MCQ Questions Answer
Q. Springs are used
a. To store energy
b. To reduce the magnitude of the transmitted force due to impact orshock
c. To alter vibratory characteristics of a member
d. To apply force or control motion
e. Any of the above
Q. Which of the following is not a symmetrical section
a. Circular
b. 1 beam with equal flanges
c. Equal angle iron
d. All of the above
e. 10 kg
Q. The cross-section of a standard fillet weld is a triangle with base angles of
a. 45? and 45?
b. Increasing the diameter of threaded portion
c. 35? and 55?
d. 60? and 30?
e. 50? and 40?
Q. A key that transmits power through frictional resistance only is
a. Saddle key
b. Wood ruff key
c. Square key
d. All of the above
e. None of the above
Q. The column which has the highest equivalent length has
a. Both ends fixed
b. One end fixed and other end free
c. Both ends hinged and pin joined
d. One end fixed and other end hinged
e. None of the above
Q. Where a spring with a spring rate that increases with load is desired
a. Soft springs are used
b. Non-ferrous springs are used
c. Elliptical section is preferred
d. Conical spring are used
e. None of the above
Q. Lowest value of joint efficiency is assumed in case of
a. Single riveted butt joints
b. Double riveted butt joints
c. Single riveted lap joints
d. Double riveted lap joints
e. None of the above
Q. The rated life of a ball bearing vaires
a. Inversely as cube of load
b. Directly as load
c. Directly as square of load
d. Directly as cube of load
e. Inversely as square of load
Q. IC engine cylinders are lubricated by
a. thin film lubricated
b. thick film lubrication
c. either of (A) and (B) above
d. none of the above
e. Increasing the diameter of threaded portion
Q. Hydraulic testing of boilers is done at pressures
a. Slightly above atmospheric pressure
b. Below and above atmosphere
c. At half the working pressure of boiler
d. At 1
e. At working pressure of boiler
Q. In case of pressure vessels having open ends the fluid pressure induces
a. shear stress
b. Increasing the diameter of threaded portion
c. circumferential stress
d. longitudinal compressive stress
e. longitudinal tensile stress
Q. For very heavy loads which of the following gear tooth profile will be preferred?
a. 20? stub involute profile
b. 14
c. 14
d. 14
e. 20? full depth involute profile
Q. How many revolutions per minute one radian per second is equal to
a. 3.6
b. 5.949
c. 9.549
d. 1/3.6
e. 1