Related Questions

A bakery opened yesterday with its daily supply of 40 dozen rolls. Half of the rolls were sold by noon, and 80% of the remaining rolls were sold between noon and closing time. How many dozen rolls had been sold when the bakery closed yesterday?
A 2 dozen
B 4 dozen
C 5 dozen
D 8 dozen
Ball mills and tube mills with flint or porcelain balls are used for size reduction of
A Asbestos
B Rubber
C Non-metallic ores
D Limestone
What is the usual value of angle of nip for crushing of ordinary rock in smooth steel crushing rolls?
A 16°
B 32°
C 40°
D 46°
A batsman hits a cricket ball which then rolls on a level ground. After covering a short distance, the ball comes to rest. The ball slows to a stop because
A The batsman did not hit the ball hard enough
B Velocity is proportional to the force exerted on the ball
C There is a force on the ball opposing the motion
D There is no unbalanced force on the ball, so the ball would try to come to rest
Size reduction of ice and gypsum can be accomplished suitably by a __________ crusher.
A Blake jaw
B Toothed roll
C Gyratory
D None of these
Mr. Mamun bought 73 rolls of film. He can take 24 pictures with each roll of film. What is the total number of pictures he can take with 73 rolls of film ?
A 1,642
B 1,652
C 1,742
D 1,752
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
For crushing of solids, the Rittinger's law states that the work required for crushing is proportional to
A The new surface created
B The size reduction ratio
C The change in volume due to crushing
D None of these
Angle of nip of the crushing rolls does not depend upon the
A Diameter of the rolls
B Speed of the rolls
C Product size
D Feed size
The cost of four rolls, six samuchas and three loaves of bread is Tk. 91. The cost of two rolls, three samuchas and one loaf of bread is Tk. 39. What is the cost of one loaf of bread?
A Tk. 10.50
B Tk. 11.00
C Tk. 12.00
D Tk. 13.00

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