Basics Of Mechanical Engineering

50 Questions | Total Attempts: 183

SettingsSettingsSettings
Basics Of Mechanical Engineering - Quiz


Questions and Answers
  • 1. 
    The drag force exerted by a fluid on a body immersed in the fluid is due to
    • A. 

      Pressure and viscous forces

    • B. 

      Pressure and gravity forces

    • C. 

      Pressure and surface tension forces

    • D. 

      Viscous and gravity forces

  • 2. 
    Newton law of viscosity depends upon the
    • A. 

      Stress and strain of the fluid

    • B. 

      Shear stress, pressure and velocity

    • C. 

      Shear stress and rate of strain

    • D. 

      Viscosity and shear stress

  • 3. 
    For a Newtonian fluid 
    • A. 

      Shear stress  is proportional to shear strain

    • B. 

      Rate of shear stress  is proportional to shear strain

    • C. 

      Shear stress  is proportional to rate of shear strain

    • D. 

      Rate of shear stress  is proportional to rate of shear strain

  • 4. 
    Surface tension is due to
    • A. 

      Viscous forces

    • B. 

      Cohesion

    • C. 

      Adhesion

    • D. 

      The difference between adhesive and cohesive forces

  • 5. 
    The relative density of mercury is
    • A. 

      1

    • B. 

      9.8

    • C. 

      13.6

    • D. 

      13600

  • 6. 
    If the Reynolds number is less than 2000, the flow in a pipe is
    • A. 

      Turbulent

    • B. 

      Laminar

    • C. 

      Transition

    • D. 

      None of the above

  • 7. 
    Anemometer is used to measure
    • A. 

      Velocity

    • B. 

      Pressure

    • C. 

      Viscosity

    • D. 

      Density

  • 8. 
    Property of fluid that describes its internal resistance is known as:
    • A. 

      Viscosity

    • B. 

      Friction

    • C. 

      Resistance

    • D. 

      Internal energy

  • 9. 
    The heat is absorbed by
    • A. 

      Condenser

    • B. 

      Evaporator

    • C. 

      Compressor

    • D. 

      Thermostat

  • 10. 
    The body which absorbs all radiations incident upon it, is called as
    • A. 

      Black body

    • B. 

      White body

    • C. 

      Opaque body

    • D. 

      Transparent body

  • 11. 
    Heat transfer takes place according to
    • A. 

      First Law of Thermodynamics

    • B. 

      Second Law of Thermodynamics

    • C. 

      Third Law of Thermodynamics

    • D. 

       Zeroth Law of Thermodynamics

  • 12. 
    Heat is mainly transferred by conduction, convection and radiation in
    • A. 

      Insulated pipes carrying hot water

    • B. 

      Refrigerator freezer coil

    • C. 

      Boiler furnaces

    • D. 

      Condensation of steam in a condenser

  • 13. 
    Units for thermal conductivity
    • A. 

       J/kg.K

    • B. 

      J/mol.K

    • C. 

       J.ohm/sec.K2

    • D. 

      W/m.K

  • 14. 
    The heat generated in resistance welding is given by:
    • A. 

      H = I2RT

    • B. 

      H = I2R / T

    • C. 

      H = I2R / T

    • D. 

      H = I2R / T

  • 15. 
    The process of joining two pieces in which a non-ferrous alloy is introduced in a liquid state between the piece of metals and allowed to solidify is known as
    • A. 

      Welding

    • B. 

      Brazing

    • C. 

      Lancing

    • D. 

      Riveting

  • 16. 
    Which of the following operation is required for making a chamfer on the edge of a hole?
    • A. 

      Spot facing

    • B. 

      Facing

    • C. 

      Facing

    • D. 

      Counter sinking

  • 17. 
    Which of the following operation(s) can be performed by a drilling machine?
    • A. 

      Drilling

    • B. 

      Reaming

    • C. 

      Boring

    • D. 

       all of the above

  • 18. 
    Size of the lathe is specified by:
    • A. 

      Maximum job length in mm that may be held between centers

    • B. 

      The height of centers measured over the lathe bed

    • C. 

      Maximum job length in mm that may be held between centers

    • D. 

      All of the above

  • 19. 
    The process of making cup-shaped parts from sheet metal blank pulling into dies with the help of punch is called:
    • A. 

      Drawing

    • B. 

      Spinning

    • C. 

      Extrusion

    • D. 

      Forming

  • 20. 
    Stainless steel is very difficult to grind due to its
    • A. 

      Toughness

    • B. 

      Ability to work harden

    • C. 

      Both (A) and (B)

    • D. 

      None of the above

  • 21. 
    Grinding is commonly used on
    • A. 

      Aluminium

    • B. 

      Brass

    • C. 

      Plastic

    • D. 

      Cast Iron

  • 22. 
    For a turning operation, the ‘l’ is the length of the job, ‘f’ is the feed rate and ‘n’ is the rpm of work. The cutting time for turning is calculated by:
    • A. 

      F / (l x n) minutes

    • B. 

      N / (f x l) minutes

    • C. 

      (f x n) / l minutes

    • D. 

      L / (f x n) minutes

  • 23. 
    The steel containing 0.8% carbon has a structure of
    • A. 

      Cementite

    • B. 

      Pearlite

    • C. 

      Martensite

    • D. 

      Ferrite

  • 24. 
    If a bar of length, l, cross-sectional area, A, weighing, W, is fixed vertically at its upper end, its elongation is equal to
    • A. 

      Wl/2AE

    • B. 

      Wl/AE

    • C. 

      2AE/2Wl

    • D. 

      AE/Wl

  • 25. 
    In a cantilever, the bending moment is maximum at the
    • A. 

       Free end

    • B. 

      Mid span

    • C. 

      Fixed end

    • D. 

      None of the above

Back to Top Back to top