USM MCQ

Test your knowledge with important USM MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more USM MCQs at Bissoy

• In Micro-USM, using WC tool, what is the value of diameter can be achieved?
  ক

  1 μm

  খ

  3 μm

  গ

  5 μm

  ঘ

  7 μm
• In Micro-Ultrasonic Machining, which of the following component vibrates?
  ক

  Tool

  খ

  Work piece

  গ

  Feed pipe

  ঘ

  All of the mentioned
• How much is the value of surface finished, achieved using Ultrasonic Polishing?
  ক

  0.1 μm

  খ

  0.3 μm

  গ

  0.5 μm

  ঘ

  0.7 μm
• In production of EDM electrodes, typical ultrasonic speeds, in graphite ranges between?
  ক

  0.01 – 0.10 cm/min

  খ

  0.10 – 0.25 cm/min

  গ

  0.25 – 0.40 cm/min

  ঘ

  0.40 – 1.40 cm/min
• What is the value of depth in Ultrasonic sinking, after which, material removal becomes difficult?
  ক

  1 to 2 mm

  খ

  2 to 5 mm

  গ

  5 to 7 mm

  ঘ

  7 to 10 mm
• On which of the following features of cavity, will the penetration depth depend on?
  ক

  Depth

  খ

  Diameter

  গ

  Size

  ঘ

  All of the mentioned.
• State whether the following statement is true or false. “Rotary Ultrasonic Machining is the process in which, interrupted drilling of small-diameter holes takes place.”
  ক

  True

  খ

  False
• In which of the following materials, Rotary Ultrasonic Machining can be used to drill holes through them?
  ক

  Glass

  খ

  Alumina

  গ

  Ferrite

  ঘ

  All of the mentioned
• Drilling in Ultrasonic Machining is done, by which motion of the tool?
  ক

  Only rotation

  খ

  Only oscillation

  গ

  Oscillation and rotation

  ঘ

  None of the mentioned
• What is the limit of surface area that is to be machined using USM?
  ক

  <100 mm2

  খ

  <500 mm2

  গ

  <1000 mm2

  ঘ

  <1500 mm2
• Ultrasonic Machining can be used for which of the following processes and applications?
  ক

  Drilling

  খ

  Sinking and contouring

  গ

  Polishing

  ঘ

  All of the mentioned
• When the viscosity of liquid carrier is increased, the surface quality of the parts?
  ক

  Increased

  খ

  Decreased

  গ

  Remained same

  ঘ

  None of the mentioned
• What is value of surface finish achieved, when we use the abrasive of grit number 240?
  ক

  0.01 – 0.08 μm

  খ

  0.08 – 0.13 μm

  গ

  0.13 – 0.25 μm

  ঘ

  0.25 – 0.38 μm
• Which of the following factors affect the surface finish of machined parts in Ultrasonic Machining?
  ক

  Amplitude

  খ

  Material

  গ

  Tool surface

  ঘ

  All of the mentioned
• Typical roundness error in glass, resulted due to lateral vibrations is between?
  ক

  01 –20 μm

  খ

  20 – 40 μm

  গ

  40 – 140 μm

  ঘ

  150 – 250 μm
• Typical roundness error in graphite, resulted due to lateral vibrations is between?
  ক

  01 – 20 μm

  খ

  20 – 60 μm

  গ

  60 – 100 μm

  ঘ

  100 – 150 μm
• Conicity resulting after machining by Ultrasonic Machining can be reduced by?
  ক

  Direct injection of slurry

  খ

  Tools having negative taper

  গ

  High static pressure

  ঘ

  All of the mentioned
• In the following USM accuracy levels are limited to which value?
  ক

  ± 0.01 mm

  খ

  ± 0.05 mm

  গ

  ± 0.10 mm

  ঘ

  ± 0.50 mm
• While machining B4C, tool over cut size when compared to mean grain size is?
  ক

  Two times greater

  খ

  Two times smaller

  গ

  Three times greater

  ঘ

  Three times smaller
• While machining W4C and glass, tool over cut size when compared to mean grain size is?
  ক

  Two times greater

  খ

  Two times smaller

  গ

  Three times greater

  ঘ

  Three times smaller
• State whether the statement is true or false. “Hole oversize measures the difference between hole diameter measured at the bottom surface, and the tool diameter.”
  ক

  True

  খ

  False
• Which one of the following factors affects the accuracy of parts?
  ক

  Steady abrasive flow

  খ

  Accurate feed

  গ

  Unsteady abrasive flow

  ঘ

  Ultrasonic frequency
• Which of the following distribution factors, does not affect the machining parts?
  ক

  Side wear of tool

  খ

  Abrasive wear

  গ

  Accurate feed

  ঘ

  Form error of tool
• When the static pressure of the feed is increases, what happens to MRR?
  ক

  Increases

  খ

  Decreases

  গ

  Increase up to a limiting condition

  ঘ

  Decrease up to a limiting condition
• As the tool area increases, what happens to MRR?
  ক

  Decreases

  খ

  Increases

  গ

  Remains same

  ঘ

  None of the mentioned
• Machining rate can be affected by the ratio of hardness of tool to that of hardness of work piece.
  ক

  True

  খ

  False
• How much percent of the abrasives are recommended in general for abrasive medium?
  ক

  10 – 15 %

  খ

  15 – 20 %

  গ

  25 – 30 %

  ঘ

  30 – 35 %
• If there is an increase in viscosity of slurry, what happens to MRR?
  ক

  Increases

  খ

  Decreases

  গ

  Remains same

  ঘ

  None of the mentioned
• Which of the following can be used as an abrasive carrying medium?
  ক

  Water

  খ

  Benzene

  গ

  Glycerol

  ঘ

  All of the mentioned
• As the vibration frequency increases, what happens to material removal rate?
  ক

  Decreases

  খ

  Increases

  গ

  Increase and then decrease

  ঘ

  Decrease and then increase