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

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
by

1 Answer

Answer :

(C) Increasing size of feed at constant reduction ratio
by

Related questions

Energy consumption in a crusher decreases with increase in the (A) Size of the product (at constant feed size) (B) Capacity of the crushing machine (C) Size of feed (at constant reduction ratio) (D) All (A), (B) & (C)

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Last Answer : (D) All (A), (B) & (C)

Arrange the following size reduction equipment in the decreasing order of the average particle size produced by each of them. (A) Jaw crusher, Ball mill, Fluid energy mill(B) Ball mill, Jaw crusher, Fluid energy mill(C) Fluid energy mill, Jaw crusher, Ball mill(D) Fluid energy mill, Ball mill, Jaw crusher

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Last Answer : (A) Jaw crusher, Ball mill, Fluid energy mill

Which of the following achieves the least reduction ratio for a given feed size? (A) Jaw crusher (B) Roll crusher (C) Cone crusher (D) Gyratory crusher

Description : Which of the following achieves the least reduction ratio for a given feed size? (A) Jaw crusher (B) Roll crusher (C) Cone crusher (D) Gyratory crusher

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Last Answer : (B) 2.5 times

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Last Answer : (B) Reduction ratio in crushing operation is defined as the ratio of minimum feed size to the maximum product size

Feed size of ≥ 25 cms can be accepted by (A) Ball mill (B) Rod mill (C) Fluid energy mill (D) Jaw crusherFeed size of ≥ 25 cms can be accepted by(A) Ball mill(B) Rod mill(C) Fluid energy mill(D) Jaw crusher

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Last Answer : (B) Cage mill

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

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Last Answer : (C) Cutting machines mainly employ 'attrition' for size reduction of solids

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Last Answer : (D) All (A), (B) and (C)

Pick out the wrong statement pertaining to the roll crushers. (A) Maximum feed size determines the required roll diameter (B) For hard material's crushing, the reduction ratio should not exceed 4 (C) Both the rolls run necessarily at the same speed (D) Reduction ratio and differential roll speed affect production rate & energy consumed per unit of surface produced

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Last Answer : (C) Both the rolls run necessarily at the same speed

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Last Answer : (C) Consumes more power

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

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Last Answer : (B) 0.087 L.S

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)

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pecific energy requirement of rotary tillers can be reduce by a) Increasing the bite length b) Decreasing depth to diameter ratio c) Both (a) and (b) d) Excessive reduction in total power requirement

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Last Answer : c) Both (a) and (b)

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Last Answer : (D) All (A), (B) and (C

. 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

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Pick out the wrong statement. (A) Gape is the greatest distance between the crushing surfaces or the jaws (B) The angle of nip (2α) is the angle between roll faces at the level where they will just take hold of a particle and draw it in the crushing zone (C) Crushing efficiency is the ratio of the energy absorbed by the solid to the surfaces energy created by crushing (D) Reduction ratio is the ratio of the maximum size of the particles in the feed to that in the product

Description : Pick out the wrong statement. (A) Gape is the greatest distance between the crushing surfaces or the jaws (B) The angle of nip (2α) is the angle between roll faces at the level where they will ... Reduction ratio is the ratio of the maximum size of the particles in the feed to that in the product

Last Answer : (C) Crushing efficiency is the ratio of the energy absorbed by the solid to the surfaces energy created by crushing

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Last Answer : (C) Gyratory crusher

Energy requirement (per unit mass of material crushed/ground) is highest for (A) Jaw crusher (B) Rod mill (C) Ball mill (D) Fluid energy mil

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Last Answer : (D) All (A), (B) and (C)

Run of mine (ROM) coal is crushed by a __________ for use in domestic ovens. (A) Jaw crusher (B) Hammer crusher (C) Ball mill (D) Tube mil

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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

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Last Answer : (B) 0.0184

Which of the following is not a part of the Blake jaw crusher? (A) Hanger (B) Check plates (C) Toggles (D) Pitman

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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)

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