Related Questions

Size reduction mechanism used in Jaw crushers is
A Attrition
B Compression
C Cutting
D Impact
Toothed roll crushers achieve size reduction by
A Tearing (shear) and compression
B Impact and attrition
C Both A & B
D Neither A nor B
Size reduction of __________ is accomplished in steam heated rollers and roll crushers.
A Resins
B Gums
C Hard rubber
D Waxes
In jaw crushers a motor has to often start against ________ load.
A Heavy
B Medium
C Normal
D Low
The term 'angle of nip' is concerned with the operation of the __________ crushers.
A Jaw
B Roll
C Gyratory
D None of these
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
A reduction of 15% in the price of a shirt resulted in the reduction of the price of the shirt by Tk 21. What was the previous price of the shirt?
A Tk. 175
B Tk. 140
C Tk. 150
D Tk. 120
Determine power rating of an electric motor if it runs at 1440 rpm and line shaft transmits torque of 75 Nm. Assume Reduction ratio =1.6
A 10.36 kW
B 11.3 kW
C 7.068kW
D 9.12kW
If the ratio of long and short spans of a two way slab with corners held down is r, the actual reduction of B.M. is given by
A $$\frac{5}{6}\left( {\frac{{\text{r}}}{{1 + {{\text{r}}^2}}}} \right){\text{M}}$$
B $$\frac{5}{6}\left( {\frac{{{{\text{r}}^2}}}{{1 + {{\text{r}}^2}}}} \right){\text{M}}$$
C $$\frac{5}{6}\left( {\frac{{{{\text{r}}^2}}}{{1 + {{\text{r}}^3}}}} \right){\text{M}}$$
D $$\frac{5}{6}\left( {\frac{{{{\text{r}}^2}}}{{1 + {{\text{r}}^4}}}} \right){\text{M}}$$
Kick's law assumes that the energy required for size reduction is proportional to the logarithm of the ratio between the initial and the final diameters. The unit of Kick's constant is
A KW. sec/kg
B KWh/kg
C KWh/sec. kg
D Kg/sec

Next steps