Which is a secondary crusher for a hard & tough stone? (A) Jaw crusher(B) Cone crusher(C) Impact crusher(D) Toothed roll crushe

Which is a secondary crusher for a hard & tough stone?
(A) Jaw crusher
(B) Cone crusher
(C) Impact crusher
(D) Toothed roll crushe
by

1 Answer

Answer :

(B) Cone crusher
by

Related questions

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Description : Which of the following comes in the category of primary crusher for hard and tough stone? (A) Jaw crusher (B) Cone crusher (C) Gyratory crusher (D) None of these

Last Answer : (A) Jaw crusher

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Which of the following is used for primary crushing of very hard lumpy materials? (A) Toothed roll crusher (B) Gyratory crusher

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Last Answer : (B) 2.5 times

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

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Last Answer : (B) 0.087 L.S

To get a fine talc powder from its granules, the equipment used is (A) Roller crusher (B) Ball mill (C) Jaw crusher (D) Gyratory crusher

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Draw symbol of (i) Tray Dryer (ii) Plate column (iii) Packed column (iv) Jaw crusher (v) Strirrer (vi) Ball mill.

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The stone suitable for rubble masonry should be. (A) Hard (B) Tough (C) Heavy (D) Light

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Last Answer : Answer: Option A

The grinding in a hammer crusher takes place due to the (A) Attrition (B) Impact (C) Both (A) & (B) (D) Neither (A) nor (B

Description : The grinding in a hammer crusher takes place due to the (A) Attrition (B) Impact (C) Both (A) & (B) (D) Neither (A) nor (B

Last Answer : (C) Both (A) & (B)

In a roll crusher, the specific power consumption and the production rate is affected by the (A) Reduction ratio (B) Differential roll speed (C) Both (A) and (B) (D) Neither (A) nor (B)

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Last Answer : (C) Both (A) and (B)

In a roll crusher, both the rolls (A) Have the same diameter (B) Are rotated towards each other (C) Run either at the same or different speeds (D) All (A), (B) and (C

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

Half the angle of nip, (α), for a roll crusher is given by (where, dr, dp and df are diameters of crushing rolls, feed particles and rolls gap respectively). (A) cos α = (dr + dp)/(dr + df) (B) cos α = (dr + df)/(dr + dp) (C) tan α = (dr + dp)/(dr + df) (D) sin α = (dr + dp)/(dr + df)

Description : Half the angle of nip, (α), for a roll crusher is given by (where, dr, dp and df are diameters of crushing rolls, feed particles and rolls gap respectively). (A) cos α = (dr + dp)/(dr + df) (B) cos α = (dr + df)/(dr + dp) (C) tan α = (dr + dp)/(dr + df) (D) sin α = (dr + dp)/(dr + df)

Last Answer : (A) cos α = (dr + dp)/(dr + df)

Limestone is normally crushed in a (A) Roll crusher (B) Hammer crusher (C) Ball mill (D) Tube mill

Description : Limestone is normally crushed in a (A) Roll crusher (B) Hammer crusher (C) Ball mill (D) Tube mill

Last Answer : (B) Hammer crusher

Coal is finally pulverised to 200 mesh size for burning in boilers by a (A) Hammer crusher(B) Ball mill(C) Roll crusher(D) Gyratory crusher

Description : Coal is finally pulverised to 200 mesh size for burning in boilers by a (A) Hammer crusher (B) Ball mill (C) Roll crusher (D) Gyratory crusher

Last Answer : (B) Ball mill

Fibrous material is broken by a (A) Roll-crusher (B) Squirrel-cage disintegrator (C) Ball mill (D) Tube mill

Description : Fibrous material is broken by a (A) Roll-crusher (B) Squirrel-cage disintegrator (C) Ball mill (D) Tube mill

Last Answer : (B) Squirrel-cage disintegrator

Cement clinker is reduced to fine size by a (A) Roll crusher (B) Ball mill (C) Tube mill (D) Hammer mill

Description : Cement clinker is reduced to fine size by a (A) Roll crusher (B) Ball mill (C) Tube mill (D) Hammer mill

Last Answer : (C) Tube mill

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Description : Carbon black is pulverised in a (A) Hammer crusher (B) Ball mill (C) Roll crusher (D) Gyratory crusher

Last Answer : (B) Ball mill

The term 'angle of nip' is concerned with the operation of the __________ crushers. (A) Jaw (B) Roll (C) Gyratory (D) None of these

Description : The term 'angle of nip' is concerned with the operation of the __________ crushers. (A) Jaw (B) Roll (C) Gyratory (D) None of these

Last Answer : (B) Roll

Size reduction does not occur due to compression in case of (A) Rod mills (B) Gyratory crushers (C) Jaw crushers (D) Smooth roll crushers

Description : Size reduction does not occur due to compression in case of (A) Rod mills (B) Gyratory crushers (C) Jaw crushers (D) Smooth roll crushers

Last Answer : (A) Rod mills

The material is crushed in a gyratory crusher by the action of (A) Impact (B) Compression (C) Attrition (D) Cutting

Description : The material is crushed in a gyratory crusher by the action of (A) Impact (B) Compression (C) Attrition (D) Cutting

Last Answer : (B) Compression

In case of a hammer crusher, (A) Crushing takes place by impact breaking (B) Maximum acceptable feed size is 30 cms (C) Reduction ratio can be varied by adjusting the distance from cage to hammers (D) All (A), (B) and (C)

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

Wheat is ground into flour in a (A) Hammer crusher (B) Roller crusher (C) Impact mill (D) Fluid energy mill

Description : Wheat is ground into flour in a (A) Hammer crusher (B) Roller crusher (C) Impact mill (D) Fluid energy mill

Last Answer : (B) Roller crusher

Increasing sulphur content in pig iron tends to make it (A) Soft (B) Hard (C) Tough (D) Ductile & malleable

Description : Increasing sulphur content in pig iron tends to make it (A) Soft (B) Hard (C) Tough (D) Ductile & malleable

Last Answer : Option B

Metallic gold ferquently is found is aluminosilicate rocks and it is finely dispersed among other minerals. It may be extracted by treating the crushe

Description : Metallic gold ferquently is found is aluminosilicate rocks and it is finely dispersed among other minerals. It may be extracted by treating the crushe

Last Answer : Metallic gold ferquently is found is aluminosilicate rocks and it is finely dispersed ... hydrometallurgical extraction D. purification of metal.

Metallic gold ferquently is found is aluminosilicate rocks and it is finely dispersed among other minerals. It may be extracted by treating the crushe

Description : Metallic gold ferquently is found is aluminosilicate rocks and it is finely dispersed among other minerals. It may be extracted by treating the crushe

Last Answer : Metallic gold ferquently is found is aluminosilicate rocks and it is finely dispersed among other minerals. It may be ... agent. D. (A) and ( C) both

For the preliminary breaking of hard rock, we use a (A) Gyratory crusher(B) Ball mill(C) Tube mill(D) Squirrel-cage disintegrator

Description : For the preliminary breaking of hard rock, we use a (A) Gyratory crusher (B) Ball mill (C) Tube mill (D) Squirrel-cage disintegrator

Last Answer : (A) Gyratory crusher

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

Description : 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 ... ratio and differential roll speed affect production rate & energy consumed per unit of surface produced

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

A stone whirling in a horizontal circle on the end of string depicts A. conical pendulum B. cone C. pendulum D. eclipse

Description : A stone whirling in a horizontal circle on the end of string depicts A. conical pendulum B. cone C. pendulum D. eclipse

Last Answer : conical pendulum

Crushing of mineral particles is accomplished in a 'cage mill', when one or more alloy steel bars are revolved in opposite directions. It is a type of __________ mill. (A) Impact (B) Roll (C) Vibratory (D) None of these

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Last Answer : (A) Impact

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