Top 550+ Solved Machine Design MCQ Questions Answer
Q. A double start screw has
a. Two threads per inch
b. Fine threads
c. Coarse threads
d. Two threads at some phase angle
e. None of the above
Q. For butt welding of two plates each of which is 25 mm thick, the best process would be
a. Electron slag welding
b. Submerged are welding
c. MIG welding
d. Gas welding
e. TIG welding
Q. The stretching in a belt is controlled by
a. Increasing belt velocity
b. Reducing stress in the belt
c. Increasing belt thickness
d. Reducing belt length
e. Increasing centre distance
Q. A positive infinitely variable (P.I.V.) system utilises
a. Variable pitch chain drive system
b. Hydraulic variable speed drive
c. Rolling contact variable speed
d. Vee belt variable speed system
e. None of the above
Q. Which oil has highest specific gravity?
a. Castor
b. Sperm
c. Cotton Seed
d. Petroleum
e. Turpentine
Q. Within the elastic range, the bulk modulus of elasticity is defined as the ratio of
a. hydrostatic stress to the volumetric strain
b. shearing stress to the shearing strain
c. longitudinal stress to the longitudinal strain
d. none of the above
e. Increasing the diameter of threaded portion
Q. In case of aircraft body the type of welding generally used is
a. Gas welding
b. Arc welding
c. Spot welding
d. Seam welding
e. None of the above
Q. A spring deflects 50 mm under a 250 kg load. If the load is applied gradually, the energy absorbed by the spring will be
a. 2500 kg-cm
b. 312.5 kg-cm
c. 1050 kg-cm
d. 625 kg-cm
e. 1250 kg-cm
Q. In a shaft, the shear stress is not directly proportional to
a. radius of the shaft
b. length of the shaft
c. Increasing the diameter of threaded portion
d. modulus of rigidity
e. angle of twist.
Q. In which component a ball or roller bearing cannot be used?
a. Water circulating pump
b. Wheel bearing in automobiles
c. Small end of connecting rod
d. Carankshaft main bearings
e. Big end of connecting rod
Q. Muntz metal contains
a. Copper-aluminium
b. Copper-tin
c. Copper-chromium
d. Copper-nickel
e. Copper-zinc
Q. The deep bins are the containers in which the plane of rupture intersects
a. the top surface of material stored
b. Increasing the diameter of threaded portion
c. the opposite surface (wall) near the bottom
d. the bottom survace of material stored
e. the opposite face (wall) near the top
Q. For design purpose a spur gear tooth is considered
a. As a cantilever
b. As vital component in analysis
c. As a rough surfacerubbing with another rough surface
d. Proped beam
e. None of the above
Q. A 20 HP 1500 r.p.m. induction motor will take current of nearly
a. 20-30 Amp
b. 5 Amp
c. 1 Amp
d. 10-15 Amp
e. 15-20 Amp
Q. Gears for wrist watches are generally manufactured by
a. Pitcl, angle
b. Helix angle
c. Axial pitch angle
d. Lead angle
e. Pressure angle