Machine Design Set 10

Mechanical Engineering

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This set of Machine Design Multiple Choice Questions & Answers (MCQs) focuses on Machine Design Set 10

Q1 | The period during which a cam follower does not move is known as
  • Free period
  • Swell period
  • Constant period
  • Stationary period
  • Fixed period
Answer: Swell period
Q2 | A 3 mm diameter rivet must be squeezed to form a head. When yield stress in tension for this alloy is 125 Kpa, the minimum value of initiating force must be not less than
  • 500 N
  • 5000 N
  • 1000 N
  • Increasing the diameter of threaded portion
  • 100 N
Answer: 500 N
Q3 | Rankine formula is valid upto slenderness ratio of
  • 100
  • 150
  • 60
  • 120
  • 80
Answer: 120
Q4 | Tack welding
  • Is a process of TIG welding
  • Is a type of weld
  • Is used for non-ferrous materials
  • Is a preparation for welding
  • None of the above
Answer: Is a type of weld
Q5 | Which is the lightest?
  • 10 Quintals
  • 1 British ton
  • 1 U.S. long ton
  • 1 metric ton
  • 1 U.S. short ton
Answer: 1 U.S. short ton
Q6 | M 10 secrews have a pitch of
  • 0.5 mm
  • 1.25 mm
  • 5.00 mm
  • 10 mm
  • 2.50 mm
Answer: 1.25 mm
Q7 | Springs are used
  • To store energy
  • To reduce the magnitude of the transmitted force due to impact orshock
  • To alter vibratory characteristics of a member
  • To apply force or control motion
  • Any of the above
Answer: Any of the above
Q8 | Which of the following is not a symmetrical section
  • Circular
  • 1 beam with equal flanges
  • Equal angle iron
  • All of the above
  • 10 kg
Answer: Equal angle iron
Q9 | The cross-section of a standard fillet weld is a triangle with base angles of
  • 45? and 45?
  • Increasing the diameter of threaded portion
  • 35? and 55?
  • 60? and 30?
  • 50? and 40?
Answer: 45? and 45?
Q10 | A key that transmits power through frictional resistance only is
  • Saddle key
  • Wood ruff key
  • Square key
  • All of the above
  • None of the above
Answer: Saddle key
Q11 | The column which has the highest equivalent length has
  • Both ends fixed
  • One end fixed and other end free
  • Both ends hinged and pin joined
  • One end fixed and other end hinged
  • None of the above
Answer: Both ends fixed
Q12 | Where a spring with a spring rate that increases with load is desired
  • Soft springs are used
  • Non-ferrous springs are used
  • Elliptical section is preferred
  • Conical spring are used
  • None of the above
Answer: Conical spring are used
Q13 | Lowest value of joint efficiency is assumed in case of
  • Single riveted butt joints
  • Double riveted butt joints
  • Single riveted lap joints
  • Double riveted lap joints
  • None of the above
Answer: Single riveted lap joints
Q14 | The rated life of a ball bearing vaires
  • Inversely as cube of load
  • Directly as load
  • Directly as square of load
  • Directly as cube of load
  • Inversely as square of load
Answer: Inversely as cube of load
Q15 | IC engine cylinders are lubricated by
  • thin film lubricated
  • thick film lubrication
  • either of (A) and (B) above
  • none of the above
  • Increasing the diameter of threaded portion
Answer: thin film lubricated
Q16 | Hydraulic testing of boilers is done at pressures
  • Slightly above atmospheric pressure
  • Below and above atmosphere
  • At half the working pressure of boiler
  • At 1
  • At working pressure of boiler
Answer: At 1
Q17 | In case of pressure vessels having open ends the fluid pressure induces
  • shear stress
  • Increasing the diameter of threaded portion
  • circumferential stress
  • longitudinal compressive stress
  • longitudinal tensile stress
Answer: circumferential stress
Q18 | Size of rivet is specified by
  • Weight
  • Shape
  • Volume
  • Shank diameter
  • Diameter of head
Answer: Shank diameter
Q19 | For very heavy loads which of the following gear tooth profile will be preferred?
  • 20? stub involute profile
  • 14
  • 14
  • 14
  • 20? full depth involute profile
Answer: 14
Answer: 14
Answer: 14
Q20 | How many revolutions per minute one radian per second is equal to
  • 3.6
  • 5.949
  • 9.549
  • 1/3.6
  • 1
Answer: 9.549
Q21 | Gantry girders are invariably designed to resist
  • transverse and lateral loads
  • Increasing the diameter of threaded portion
  • transverse, lateral and axial load
  • lateral loads only
  • transverse loads only
Answer: transverse, lateral and axial load
Q22 | The size of the fillet weld is given by
  • throat of the fillet
  • Increasing the diameter of threaded portion
  • smaller size of the plate welded
  • smaller side of the triangle
  • hypotenuse of the triangle
Answer: smaller side of the triangle
Q23 | Cast iron bearings are used
  • for reciprocating and oscillating motions only
  • Increasing the diameter of threaded portion
  • when space is the major consideration
  • when cost is the major consideration
  • for under water applications
Answer: when cost is the major consideration
Q24 | Splined shafts are most commonly used in
  • aircrafts
  • machine tools
  • automobiles
  • none of the above
  • Cast steel
Answer: automobiles
Q25 | The deflection of a helical spring is
  • Directly proportional to d3
  • Directly proportional to d3/2
  • Directly proportional to d
  • Directly proportional to d4
  • Directly proportional to d2
Answer: Directly proportional to d4
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