Top 550+ Solved Machine Design MCQ Questions Answer
Q. In above problem the cone pitch angle of the pinion will be
a. sin-1 2.0
b. cos-1 0.5
c. tan-1 0.5
d. sin-1 0.5
e. tan-1 2.0
Q. Cycloidal profile gears are used in
a. Machine tools
b. Automobiles
c. Toys
d. Watches and clocks
e. Aircraft
Q. The ratio of lateral strain to linear strain is
a. Cast steel
b. Stress ratio
c. Factor of safety
d. Poisson ratio
e. Strain ratio
Q. In case of worm and worm wheel drives, the axes of the two are
a. parallel and intersecting
b. non-parallel and intersecting
c. parallel and non-intersecting
d. non-parallel and non-intersecting
e. Increasing the diameter of threaded portion
Q. A close coiled helical spring is compressed. Its wire is subjected to
a. Torque
b. Shear
c. Tension
d. Biaxial
e. Compression
Q. The plastic design of a structure based on which of the following is always safe?
a. Mechanism method of analysis
b. Statistical method of plastic analysis
c. Upper bound theorem of plastic analysis
d. All of the above
e. Increasing the diameter of threaded portion
Q. In the case of ball bearings the contacting areas between balls and running tracks are
a. circular
b. parabolic
c. elliptical
d. none of the above
e. Cast steel
Q. Scraping of lathe bed helps in
a. lubrication
b. increasing friction
c. Increasing the diameter of threaded portion
d. reducing friction
e. firm grip between parts
Q. In an inverted tooth chain the included angle between the outer faces of the teeth?
a. 40 to 55
b. 35 to 45
c. 60 to 75
d. Increasing the diameter of threaded portion
e. 75 to 85
Q. The value of yield stress for structural steel is about
a. Increasing the diameter of threaded portion
b. 3600 kg/cm2
c. 1600 kg/cm2
d. 4600 kg/cm2
e. 2600 kg/cm2
Q. A warm gear is generally made of
a. Mild steel
b. Forged steel
c. Cast iron
d. Aluminium
e. None of the above
Q. The diameter of rivets for 20 mm thick plates would be
a. 10 mm
b. 20 mm
c. 15 mm
d. 40 mm
e. 30 mm
Q. The ratio of the plastic moment capacity to the yield moment capacity of a rolled steel beam section is about
a. 1.85
b. Increasing the diameter of threaded portion
c. 1.15
d. 1.55
e. 1
Q. Which pair of gears usually has high friction losses?
a. All have equal frictional loss
b. Spur gears
c. Bevel gears
d. Helical gears
e. Worm and worm wheel