Related Mcqs:

1. Which of the following crushers can be considered as a combination of a jaw crusher and a roller crusher ?

   A. Rod mill
   B. Fluid energy mill
   C. Gyratory crusher
   D. Ball mill

2. The capacity of a gyratory crusher is ______________ that of a jaw crusher with the same gape, handling the same feed & for the same product size range.?

   A. Same as
   B. 2.5 times
   C. 5 times
   D. 10 times

3. According to Taggart’s rule for selecting between a gyratory crusher and a jaw crusher; the later should be used, if the hourly tonnage to be crushed divided by the square of the gape expressed in cm is less than_______________?

   A. 0.00184
   B. 0.0184
   C. 0.184
   D. 1.84

4. Which of the following is not a part of the Blake jaw crusher ?

   A. Hanger
   B. Check plates
   C. Toggles
   D. Pitman

5. Which of the following comes in the category of primary crusher for hard and tough stone ?

   A. Jaw crusher
   B. Cone crusher
   C. Gyratory crusher
   D. None of these

6. Which of the following parts of a jaw crusher is subjected to maximum wear and tear during its operation ?

   A. Check plates
   B. Jaw plates
   C. Toggles
   D. Crush shaft

7. Which of the following is a coarse crusher ?

   A. Smooth roll crusher
   B. Toothed roll crusher
   C. Gyratory crusher
   D. Tube mill

8. Half the angle of nip, (α), for a roll crusher is given by (where, dr, dp and df are diameters of crushing rolls, feed particles and rolls gap respectively) ?

   A. cos α = (dr + dp)/(dr + df)
   B. cos α = (dr + df)/(dr + dp)
   C. tan α = (dr + dp)/(dr + df)
   D. sin α = (dr + dp)/(dr + df)

9. Horsepower required for a roll crusher is directly proportional to its__________________?

   A. Reduction ratio
   B. Capacity
   C. Both A. & B.
   D. Neither A. nor B.

10. Choke crushing (in case of a Jaw crusher) compared to free crushing__________________?

    A. Results in increased capacity
    B. Consumes less power
    C. Consumes more power
    D. Both A. and C.