Mechanical Operations MCQs with answers Page - 4

Here, you will find a collection of MCQ questions on Mechanical Operations. Go through these questions to enhance your preparation for upcoming examinations and interviews.

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A

Admin • 833.24K Points
Coach

Q. A cottrell precipitator makes use of the _________ for dusty air cleaning.

  • (A) Electric spark
  • (B) Corona discharge
  • (C) Alternating current
  • (D) None of these

A

Admin • 833.24K Points
Coach

Q. A filter press is

  • (A) A batch filter
  • (B) Not suitable, if the liquid is the main product
  • (C) Having prohibitively high maintenance cost
  • (D) Not suitable for wide range of materials under varying operating conditions of cake thickness and pressure

A

Admin • 833.24K Points
Coach

Q. A fluid energy mill is used for

  • (A) Cutting
  • (B) Grinding
  • (C) Ultra grinding
  • (D) Crushing

A

Admin • 833.24K Points
Coach

Q. A pebble mill

  • (A) Is a ball mill
  • (B) Employs flints or ceramic pebbles as the grinding medium
  • (C) Is a tube mill lined with ceramic or other non-metallic liner
  • (D) Both (B) and (C)

A

Admin • 833.24K Points
Coach

Q. A propeller agitator

  • (A) Produces mainly axial flow
  • (B) Is used for mixing high viscosity pastes
  • (C) Runs at very slow speed (2 rpm)
  • (D) All (A), (B) and (C)

A

Admin • 833.24K Points
Coach

Q. A sand mixture was screened through a standard 10-mesh screen. The mass fraction of the oversize material in feed, overflow and underflow were found to be 0.38, 0.79 and 0.22 respectively. The screen effectiveness based on the oversize is

  • (A) 0.5
  • (B) 0.58
  • (C) 0.68
  • (D) 0.62

A

Admin • 833.24K Points
Coach

Q. A screen is said to be blinded, when the

  • (A) Over-sizes are present in undersize fraction
  • (B) Under-sizes are retained in oversize fraction
  • (C) Screen is plugged with solid particles
  • (D) Screen capacity is abruptly increased

A

Admin • 833.24K Points
Coach

Q. A straight line is obtained on plotting reciprocal of filtration rate vs. the volume of filtrate for _________ flow of filtrate.

  • (A) Compressible cakes and laminar
  • (B) Incompressible cake and laminar
  • (C) Compressible cake and turbulent
  • (D) Incompressible cake and turbulent

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