Mechanical Operations MCQs
Practice free Mechanical Operations multiple-choice questions with instant answer feedback and step-by-step solutions. Click an option to check yourself, reveal the full explanation, and work through all 431 questions — no login required.
Question 37easy
Screw conveyors are
Question 38easy
Pulverised coal passing through 200 mesh screen has a diameter of 0.074 mm (74 micron). The same passing through 50 mesh screen will have a dia of __________ mm.
Question 39easy
Pebble mills are tumbling mills widely used for grinding in the manufacture of paints & pigments and cosmetic industries, where iron contamination in the product is highly objectionable. Pebbles used in pebble mill are made of
Advertisement
Question 40easy
In continuous filtration (at a constant pressure drop), filtrate flow rate varies inversely as the
Question 41easy
Agglomeration of individual particles into clusters (flocs) is called flocculation. To prevent flocculation, the most commonly used dispersing agents are
Question 42easy
Number of particles in a crushed solid sample is given by (where, m = mass of particles in a sample, Vp = volume of one particle, ρ= density of particles)
Advertisement
Question 43easy
Separation of particles of various sizes, shapes and densities by allowing them to settle in a fluid is called
Question 44easy
Which of the following is the most suitable for handling fibrous and dense slurries?
Question 45easy
Sphericity for a non-spherical particle is given by (where, V and S are volume and surface area respectively of one particle and D = equivalent diameter of particle).