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

Related Mcqs:

1. 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

2. 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

3. Gyratory crushers compared to the reciprocating jaw crushers__________________?

   A. Have greater capacity per unit of discharge area
   B. Crush intermittently
   C. Are less suitable for coarse materials
   D. Have less steady power consumption

4. As per Taggart’s formula, the capacity (kg/hr) of Jaw & Gyratory crushers (for gapes of 10 to 60 cms) is equal to (where, L = Length of feed opening, cms S = Maximum width of discharge opening, cms) ?

   A. LS
   B. 93 LS
   C. 250 LS
   D. √(LS)

5. Size reduction mechanism used in Jaw crushers is__________________?

   A. Attrition
   B. Compression
   C. Cutting
   D. Impact

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

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

7. 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

8. Capacity (in tons/hr) of jaw/gyratory crusher is equal to (where, L = length of the receiving opening, cm S = greater width of the discharge opening, cm) ?

   A. 0.01 L.S
   B. 0.087 L.S
   C. L.S
   D. L.S/0.087

9. During size reduction by a jaw crusher, the energy consumed decreases with the__________________?

   A. Decreasing size of product at constant size of feed
   B. Decreasing machine capacity
   C. Increasing size of feed at constant reduction ratio
   D. None of these

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.