Top 550+ Solved Machine Design MCQ Questions Answer
Q. By using large thread angles in lifting machine
a. The load will be sustained in absence of the other
b. The load will be easily lifted
c. The mechanical advantage will be high
d. The mechanical advantage will be low
e. While unloading, little effort will be required
Q. The holding power of sunk key is due to resistance which it offers in
a. Shear
b. Crushing
c. Shear and crushing
d. Tension
e. (C) and (D) above
Q. Transverse fillet welded joints are designed for
a. shear, tensile
b. tensile, compressive
c. tensile, shear
d. compressive, shear
e. Increasing the diameter of threaded portion
Q. The crest diameter of a screw thread is same as
a. Pitch diameter
b. Major diameter
c. Pitch diameter
d. Core diameter
e. Minor diameter
Q. All the dimensions for a standard system of interchangeable gears can be defined in terms of
a. Module
b. Diametral pitch and circular pitch
c. Pressure angle and pitch
d. No of teeth and pitch circular diameter
e. Addendum and dedendum
Q. Which of the following theory is also known as maximum shear stress theory of the failure of a material at the elastic limit
a. Von Mises theory
b. Guests Tresca theory
c. Rankines theory
d. Increasing the diameter of threaded portion
e. Haig's theory
Q. A fillet weld having axis parallel to the direction of the applied load is known as
a. side fillet weld
b. end fillet weld
c. diagonal fillet weld
d. flat fillet weld
e. Increasing the diameter of threaded portion
Q. As per Indian Boilers regulations the type of joint preferred for longitudinal joint is
a. Reveted butt joint
b. Any of above
c. Riveted lap joint
d. Welded joint
e. Welded joint with cover plate
Q. In case of ball bearing
a. Inner race should harder than outer race
b. Outer race should be harder than balls
c. Only cage should be hardened
d. Inner race should be harder than balls
e. Inner race, outer race and balls should be equally hardened
Q. The minimum thickness of steel members exposed to weather and accessible for painting is
a. Increasing the diameter of threaded portion
b. 6 mm
c. 12 mm
d. 8 mm
e. 10 mm
Q. In case of brittle material the theory of elastic failure generally applied is
a. Maximum total strain energy theory
b. Maximum principal stress theory
c. Distortion energy theory
d. Maximum shear stress theory
e. Maximum strain theory
Q. Stone erusher rolls are generally made
a. Cast iron
b. High carbon steel
c. Mild steel
d. Cast steel
e. Grey iron
Q. The natural frequency of a shaft in bending is
a. Nearly the same as the critical speed
b. Nearly half the critical speed
c. Exactly the same at which it is running
d. Nearly double of the critical speed
e. Depends on load and other factors
Q. Which of the following key transmits power through frictional resistance only
a. Tangent key
b. Saddle key
c. Woodruff key
d. Kennedy key
e. Sunk key
Q. In the case of a cantilever, irrespective of the type, loading of the maximum bending moment and maximum shear force occur at
a. Free end
b. ?rd of length from fixed end
c. Centre
d. Increasing the diameter of threaded portion
e. Fixed end