Q.1
Which of the following bearings cannot take radial loads?
  • a) Taper roller bearing
  • b) Thrust ball bearing
  • c) Angular contact bearing
  • d) Deep groove ball bearing
Q.2
Which of the following theory of failure is mostly used for ductile materials?
  • a) Maximum principal stress theory
  • b) Maximum shear stress theory
  • c) Distortion energy theory
  • d) Haigh’s theory
Q.3
Which of the following forms of thread can transmit power in only one direction?
  • a) Acme threads
  • b) Trapezoidal threads
  • c) Square threads
  • d) Buttress threads
Q.4
Which of the following line is the safest?
  • a) Goodman line
  • b) Soderberg line
  • c) Gerber parabola
  • d) Lagrange line
Q.5
Which of the following type of failures does modified goodman line combines?
  • a) Fatigue and yield
  • b) Bending and fatigue
  • c) Yield and bending
  • d) Fatigue, bending and yield
Q.6
Which of the following mechanical devices transfers or multiplies load with an application of small effort?
  • a) Gears
  • b) Shafts
  • c) Levers
  • d) Bearings
Q.7
Which of the following coupling consists of only sleeve and a key?
  • a) Muff coupling
  • b) Flexible coupling
  • c) Rigid coupling
  • d) Universal coupling
Q.8
Which of the following in power screws is the correct equation for torque if the load is lowered while designing a machine? ( W: Weight in N, θ: Angle of inclination, ϕ: Friction angle)
  • a) W tan (θ / ϕ)
  • b) W tan (θ x ϕ)
  • c) W tan (θ + ϕ)
  • d) W tan (θ – ϕ)
Q.9
Which of the following is a dominance of power screw?
  • a) Large load carrying capacity
  • b) High efficiency
  • c) Wear of screw is reduced
  • d) Mechanical advantage is lowered
Q.10
What is the maximum shear stress for a material of ultimate tensile strength (Sut) with keyway effect according to ASME code?
  • a) 0.18 Sut
  • b) 0.135 Sut
  • c) 0.30 Sut
  • d) 0.225 Sut
Q.11
Which of the following elements transfers torque and is only subjected with the bending moment?
  • a) Brake
  • b) Clutch
  • c) Axle
  • d) Belt drive
Q.12
Which of the following joins two rotating shafts to each other?
  • a) Key
  • b) Coupling
  • c) Gear
  • d) Belt drive
Q.13
Which of the following line is the most economical?
  • a) Goodman line
  • b) Soderberg line
  • c) Gerber parabola
  • d) Lagrange line
Q.14
Which of the following expression is not correct for designing a shaft according to rigidity?
  • a) T = GθJ / L
  • b) J = TL / Gθ
  • c) θ = TL / GJ
  • d) L = GθT / J
Q.15
In machine design, which type of welding uses an oxygen-acetlyene gas?
  • a) Thermit welding
  • b) Electric arc welding
  • c) Gas welding
  • d) Forge welding
Q.16
Which of the following is not a type of transmission shaft?
  • a) Crankshaft
  • b) Countershaft
  • c) Transmission shaft
  • d) Line shaft
Q.17
In machine design, which of the following is not true for rigid and flexible couplings?
  • a) Rigid couplings are expensive than flexible couplings
  • b) Flexible couplings can tolerate any slight misalignment between axes of shafts
  • c) Flexible couplings can absorb shocks and vibrations
  • d) Rigid couplings cannot tolerate slight misalignment between axes of shafts
Q.18
Which is not a possible type of failure in a riveted joint?
  • a) Crushing failure of the plate
  • b) Shear failure of rivet
  • c) Tensile failure of the plate between rivets
  • d) Shear failure of plate
Q.19
Which of the following is true about the roller bearing in comparison with ball bearing?
  • a) Power lost in friction is more
  • b) Axial dimensions are less
  • c) Radial dimensions are more
  • d) They have point contact
Q.20
Which of the following correctly symbolizes a fillet joint?
  • a) A right angled triangle
  • b) Two parallel lines with an arc above them
  • c) A triangle with an arc above it
  • d) A triangle
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