Related Questions

A hammer and a screwdriver currently have the same price. If the price of a hammer rises by 6% and the price of a screwdriver goes up by 4%, how much more will it cost to buy 1 hammer and 1 screwdriver?
A 5%
B 10%
C 24%
D 40%
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
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
In case of a hammer crusher, the
A Feed may be highly abrasive (Moh's scale >5)
B Minimum product size is 3 mm
C Maximum feed size may be 50 mm
D Rotor shaft carrying hammers can be vertical or horizontal
In case of a hammer crusher, the final product size depends on the
A Feed rate
B Rotor speed
C Clearance between hammer & grinding plates
D All of the above
The grinding in a hammer crusher takes place due to the
A Attrition
B Impact
C Both A & B
D Neither A nor B
Water hammer is caused, when water flowing in a pipe is suddenly brought to rest by closing the valve. The extent of pressure thus produced due to water hammer depends on the
A Pipe length
B Fluid velocity in the pipe
C Time taken to close the valve
D All of the above
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
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
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 $$\frac{{{\text{L}}.{\text{S}}}}{{0.087}}$$

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