Vibrating screens are used for handling large tonnages of materials. The vibrating motion is imparted to the screening surface by means of (A) Electromagnets (B) Cams or eccentric shafts (C) Unbalanced flywheels (D) Either (A), (B) or (C)

Vibrating screens are used for handling large tonnages of materials.
The vibrating motion is imparted to the screening surface by means of
(A) Electromagnets
(B) Cams or eccentric shafts
(C) Unbalanced flywheels
(D) Either (A), (B) or (C)
by

1 Answer

Answer :

(D) Either (A), (B) or (C)
by

Related questions

Reciprocating screens are normally inclined at an angle of 5° with the horizontal and employ gyratory motion at feed end & reciprocating motion at the discharge end. They are not suitable for the screening of the (A) Light metal powder down upto 4 mesh size (B) Dry chemicals (C) Heavy tonnages of rocks or gravel (D) Powdered food & granular materials

Description : Reciprocating screens are normally inclined at an angle of 5° with the horizontal and employ gyratory motion at feed end & reciprocating motion at the discharge end. They are not suitable for the ... Dry chemicals (C) Heavy tonnages of rocks or gravel (D) Powdered food & granular materials

Last Answer : (C) Heavy tonnages of rocks or gravel

are used for construction of core of electromagnets. (a) Soft magnetic materials (b) Hard magnetic materials (c) Either (a) or (b) (d) None of the above

Description : are used for construction of core of electromagnets. (a) Soft magnetic materials (b) Hard magnetic materials (c) Either (a) or (b) (d) None of the above

Last Answer : (a) Soft magnetic materials

The unbalanced force caused by an eccentric mass m rotating at an angular speed v and located at a distance r from the axis of rotation is 2 a. mr ω 2 b. mgω 2 c. mr ω 2

Description : The unbalanced force caused by an eccentric mass m rotating at an angular speed v and located at a distance r from the axis of rotation is 2 a. mr ω 2 b. mgω 2 c. mr ω 2

Last Answer : c. mr ω 2

Vibrating screens have capacity in the range of __________ tons/ft 2 .mm mesh size. (A) 0.2 to 0.8 (B) 5 to 25 (C) 50 to 100 (D) 100 to 250

Description : Vibrating screens have capacity in the range of __________ tons/ft 2 .mm mesh size. (A) 0.2 to 0.8 (B) 5 to 25 (C) 50 to 100 (D) 100 to 250

Last Answer : (A) 0.2 to 0.8

Which of the following screens has the maximum capacity? (A) Grizzlies (B) Trommels (C) Shaking screen (D) Vibrating screen

Description : Which of the following screens has the maximum capacity? (A) Grizzlies (B) Trommels (C) Shaking screen (D) Vibrating screen

Last Answer : (D) Vibrating screen

Which of the following is not an industrial screening equipment? (A) Sharpies centrifuge (B) Vibrating screen (C) Grizzly (D) Trommel

Description : Which of the following is not an industrial screening equipment? (A) Sharpies centrifuge (B) Vibrating screen (C) Grizzly (D) Trommel

Last Answer : (A) Sharpies centrifug

Pick out the wrong statement. (A) Surface tension of a substance vanishes at critical point, as there is no distinction between liquid and vapour phases at its critical point (B) Entropy of a system decreases with the evolution of heat (C) Change of internal energy is negative for exothermic reactions (D) The eccentric factor for all materials is always more than one

Description : Pick out the wrong statement. (A) Surface tension of a substance vanishes at critical point, as there is no distinction between liquid and vapour phases at its critical point (B) Entropy of ... is negative for exothermic reactions (D) The eccentric factor for all materials is always more than one

Last Answer : (D) The eccentric factor for all materials is always more than one

A useful instrument for checking A.C. motor performance by measuring possible unbalanced currents is the _____________. A. hand or battery-operated megger B. vibrating-reed frequency meter C. hook-on voltmeter-ammeter D. D'Arsonval iron-vane probe

Description : A useful instrument for checking A.C. motor performance by measuring possible unbalanced currents is the _____________. A. hand or battery-operated megger B. vibrating-reed frequency meter C. hook-on voltmeter-ammeter D. D'Arsonval iron-vane probe

Last Answer : Answer: C

A vibrating machine of 100 kg is mounted on a rubber pad which has stiffness of 500 N/m. Determine force transmitted to the foundation if the unbalanced force 500 N acts on it. The frequency ratio (ω/ω n ) is 1.5 and ξ = 0.5 A. 461.62 N B. 400.23 N C. 450 N D. Insufficient data

Description : A vibrating machine of 100 kg is mounted on a rubber pad which has stiffness of 500 N/m. Determine force transmitted to the foundation if the unbalanced force 500 N acts on it. The frequency ratio (ω/ω n ) is 1.5 and ξ = 0.5 A. 461.62 N B. 400.23 N C. 450 N D. Insufficient data

Last Answer : A. 461.62 N

Pick up the correct statement from the following: A. The materials separated by screens, is called screenings B. The screenings are disposed off either by burning or by burial or by dumping C. The process of burning the screenings, is known as compositing D. All the above

Description : Pick up the correct statement from the following: A. The materials separated by screens, is called screenings B. The screenings are disposed off either by burning or by burial or by dumping C. The process of burning the screenings, is known as compositing D. All the above

Last Answer : ANS: D

Pick out the wrong statement. (A) A ferromagnetic material becomes paramagnetic above the 'Curie temperature' (B) Permanent magnets are made of hard materials, whereas electromagnets require soft magnetic materials (C) Soft magnetic materials (e.g., pure iron) have higher permeability and low hysterisis loss and coercive forces (D) Tungsten steel and alnico are not hard magnetic materials

Description : Pick out the wrong statement. (A) A ferromagnetic material becomes paramagnetic above the 'Curie temperature' (B) Permanent magnets are made of hard materials, whereas electromagnets require soft ... hysterisis loss and coercive forces (D) Tungsten steel and alnico are not hard magnetic materials

Last Answer : Option D

electromagnets generally function as holding magnets. (a) Tractive (b) Portative (c) Either of the above (d) None of the above

Description : electromagnets generally function as holding magnets. (a) Tractive (b) Portative (c) Either of the above (d) None of the above

Last Answer : (b) Portative

The mechanical brakes are operated by means of (A) levers (B) bell cranks (C) cams (D) all of the above

Description : The mechanical brakes are operated by means of (A) levers (B) bell cranks (C) cams (D) all of the above

Last Answer : (D) all of the above

In hydrodynamic bearing, (A) The axis of journal is eccentric with respect to axis of bearing (B) The axis of journal is concentric with respect to axis of bearing (C) The axis can be either eccentric or concentric depending upon speed (D) None of the above

Description : In hydrodynamic bearing, (A) The axis of journal is eccentric with respect to axis of bearing (B) The axis of journal is concentric with respect to axis of bearing (C) The axis can be either eccentric or concentric depending upon speed (D) None of the above

Last Answer : (A) The axis of journal is eccentric with respect to axis of bearing

In hydrostatic bearing, (A) The axis of journal is eccentric with respect to axis of bearing (B) The axis of journal is concentric with respect to axis of bearing (C) The axis can be either eccentric or concentric depending upon speed (D) None of the above

Description : In hydrostatic bearing, (A) The axis of journal is eccentric with respect to axis of bearing (B) The axis of journal is concentric with respect to axis of bearing (C) The axis can be either eccentric or concentric depending upon speed (D) None of the above

Last Answer : (B) The axis of journal is concentric with respect to axis of bearing

A doubly reinforced section is used (a) When the members are subjected to alternate external loads and the bending moment in the sections reverses. (b) When the member are subjected to loading eccentric in either side of the axis. (c) When the members are subjected to accidental lateral loads . (d) All of the above

Description : A doubly reinforced section is used (a) When the members are subjected to alternate external loads and the bending moment in the sections reverses. (b) When the member are subjected to loading eccentric in ... . (c) When the members are subjected to accidental lateral loads . (d) All of the above

Last Answer : (d) All of the above

Which of the following is not true for cast iron flywheels? a) Excellent damping b) Cheap c) Given complex shape d) Sudden failure

Description : Which of the following is not true for cast iron flywheels? a) Excellent damping b) Cheap c) Given complex shape d) Sudden failure

Last Answer : d) Sudden failure

Flywheels are used in punching and shear operation. a) True b) False

Description : Flywheels are used in punching and shear operation. a) True b) False

Last Answer : a) True

For sizing of fine materials, the most suitable equipment is a (A) Trommel (B) Grizzly (C) Shaking screen (D) Vibrating screen

Description : For sizing of fine materials, the most suitable equipment is a (A) Trommel (B) Grizzly (C) Shaking screen (D) Vibrating screen

Last Answer : (D) Vibrating screen

By buying in large quantities and delivering to customers in smaller lots, a wholesaler may perform all of the following physical distributi9on activities except 1. inventory planning 2. transportation 3. materials handling 4. unit pricing 5. communication

Description : By buying in large quantities and delivering to customers in smaller lots, a wholesaler may perform all of the following physical distributi9on activities except 1. inventory planning 2. transportation 3. materials handling 4. unit pricing 5. communication

Last Answer : unit pricing

Air-tech management learns that last month's production run of heaters is defective and announces a recall of the specific models produced. To handle the large number of products it expects to receive for replacement, Air -tech will probably need to add a __________ to its distribution network. A)distribution centre B)private warehouse C)dispatching shipment system D)public warehouse E)materials handling system

Description : Air-tech management learns that last month's production run of heaters is defective and announces a recall of the specific models produced. To handle the large number of products ... distribution centre B)private warehouse C)dispatching shipment system D)public warehouse E)materials handling system

Last Answer : D)public warehouse

By buying in large quantities and delivering to customers in smaller lots, a wholesaler may perform all of the following physical distribution activities except A)inventory planning. B)transportation. C)materials handling. D)unit pricing. E)communication.

Description : By buying in large quantities and delivering to customers in smaller lots, a wholesaler may perform all of the following physical distribution activities except A)inventory planning. B)transportation. C)materials handling. D)unit pricing. E)communication.

Last Answer : D)unit pricing.

Trommels employ __________ for screening of materials. (A) Fibrous cloth(B) Woven wire screen(C) Punched plate(D) None of these

Description : Trommels employ __________ for screening of materials. (A) Fibrous cloth (B) Woven wire screen (C) Punched plate (D) None of these

Last Answer : (C) Punched plate

Soil acceleration increases draft because of a) Increased normal load on soil working surface b) Increased frictional resistance c) Kinetic energy imparted to the soil d) All of the above

Description : Soil acceleration increases draft because of a) Increased normal load on soil working surface b) Increased frictional resistance c) Kinetic energy imparted to the soil d) All of the above

Last Answer : d) All of the above

A body is vibrating with simple harmonic motion of aplitude 5 cm frequency 10 vibrations per second. The maximum value of velocity in cm/s will be a.3.14 cm/s b.314 cm/s c.3140 cm/s d.31.4 cm/s e.31400 cm/s

Description : A body is vibrating with simple harmonic motion of aplitude 5 cm frequency 10 vibrations per second. The maximum value of velocity in cm/s will be a.3.14 cm/s b.314 cm/s c.3140 cm/s d.31.4 cm/s e.31400 cm/s

Last Answer : b. 314 cm/s

What is the overall state of motion of a vibrating particle ?

Description : What is the overall state of motion of a vibrating particle ?

Last Answer : The overall state of motion of a vibrating angle is called a phase.

Sound waves are produced by - (1) Linear motion (2) Circular motion (3) Vibrating bodies (4) Transitional motion

Description : Sound waves are produced by - (1) Linear motion (2) Circular motion (3) Vibrating bodies (4) Transitional motion

Last Answer : (3) Vibrating bodies Explanation: Sound is produced when something vibrates. The vibrating body causes the medium (water, air, etc.) around it to vibrate.

The equation of motion for a vibrating system with viscous damping is d 2 x/dt 2 + c/m X dx/dt + s/m X x = 0 If the roots of this equation are real, then the system will be A. over damped B. under damped C. critically damped D. none of the mentioned

Description : The equation of motion for a vibrating system with viscous damping is d 2 x/dt 2 + c/m X dx/dt + s/m X x = 0 If the roots of this equation are real, then the system will be A. over damped B. under damped C. critically damped D. none of the mentioned

Last Answer : A. over damped

Which of the following statements is/are true for coulomb damping? 1. Coulomb damping occurs due to friction between two lubricated surfaces2. Damping force is opposite to the direction of motion of vibrating body 3. For smooth surfaces, coefficient of friction depends upon velocity 4. Damping force depends upon the rubbing velocity between two rubbing surfaces a. Only statement 1 b. Statement 2, 3 and statement 4 c. Only statement 2 d. All the above statements are true

Description : Which of the following statements is/are true for coulomb damping? 1. Coulomb damping occurs due to friction between two lubricated surfaces2. Damping force is opposite to the direction of motion of vibrating body ... 2, 3 and statement 4 c. Only statement 2 d. All the above statements are true

Last Answer : c. Only statement 2

In vibrometer, the relative motion between the mass and vibrating body is converted into proportional ________. (A) current (B) voltage (C) resistance (D) ampere

Description : In vibrometer, the relative motion between the mass and vibrating body is converted into proportional ________. (A) current (B) voltage (C) resistance (D) ampere

Last Answer : (B) voltage

The equation of motion for a vibrating system with viscous damping is d 2 x/dt 2 + c/m X dx/dt + k/m X x = 0 If the roots of this equation are real, then the system will be a) over damped b) under damped c) critically damped d) none of the mentioned Ans:a

Description : The equation of motion for a vibrating system with viscous damping is d 2 x/dt 2 + c/m X dx/dt + k/m X x = 0 If the roots of this equation are real, then the system will be a) over damped b) under damped c) critically damped d) none of the mentioned Ans:a

Last Answer : a) over damped

The TOTAL energy of a vertically vibrating block attached to a spring is the same: w) only at those points above the equilibrium position x) only at the equilibrium position y) only at those points below the equilibrium position z) at all points in its motion

Description : The TOTAL energy of a vertically vibrating block attached to a spring is the same: w) only at those points above the equilibrium position x) only at the equilibrium position y) only at those points below the equilibrium position z) at all points in its motion

Last Answer : ANSWER: Z -- AT ALL POINTS IN ITS MOTION

The lost motion in CNC machine tool is on account of a.Backlash in gearing b.Wind-up of drive shafts c.Deflection of machine tool members d.All the above

Description : The lost motion in CNC machine tool is on account of a.Backlash in gearing b.Wind-up of drive shafts c.Deflection of machine tool members d.All the above

Last Answer : a.Backlash in gearing

In screen analysis, the notation +5 mm/-10 mm means particles passing through (A) 10 mm screen and retained on 5 mm screen (B) 5 mm screen and retained on 10 mm screen (C) Both 5 mm and 10 mm screens (D) Neither 5 mm nor 10 mm screen

Description : In screen analysis, the notation +5 mm/-10 mm means particles passing through (A) 10 mm screen and retained on 5 mm screen (B) 5 mm screen and retained on 10 mm screen (C) Both 5 mm and 10 mm screens (D) Neither 5 mm nor 10 mm screen

Last Answer : (A) 10 mm screen and retained on 5 mm screen

Higher is the mesh number, smaller will be the aperture size of the screen. It means that the aperture size of a 200 mesh screen will be smaller than that of 20 mesh screen. This is valid for(A) British standard screens(B) German standard screens (DIN 1171) etc(C) American standard screens (ASTM and Tyler standard screens)(D) All (A), (B) and (C)

Description : Higher is the mesh number, smaller will be the aperture size of the screen. It means that the aperture size of a 200 mesh screen will be smaller than that of 20 mesh screen. This is valid for (A) British ... (C) American standard screens (ASTM and Tyler standard screens) (D) All (A), (B) and (C)

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

Transmission lines are either balanced or unbalanced with respect to _________. A. negative terminal B. input C. ground D. positive terminal

Description : Transmission lines are either balanced or unbalanced with respect to _________. A. negative terminal B. input C. ground D. positive terminal

Last Answer : C. ground

The loads on distributors systems are generally (a) balanced (b) unbalanced (c) either of the above (d) none of the above

Description : The loads on distributors systems are generally (a) balanced (b) unbalanced (c) either of the above (d) none of the above

Last Answer : (b) unbalanced

Super charging by Roots blower means A. the cost will be very high B. the life would be short C. creating balancing problems at high speeds D. handling large volume of air without being too bulky

Description : Super charging by Roots blower means A. the cost will be very high B. the life would be short C. creating balancing problems at high speeds D. handling large volume of air without being too bulky

Last Answer : ANSWER : D

The maximum displacement of a vibrating body on either side of its central position is known as _______________. a)amplitude b)frequency c)time period d)hertz

Description : The maximum displacement of a vibrating body on either side of its central position is known as _______________. a)amplitude b)frequency c)time period d)hertz

Last Answer : a)amplitude

.The shafts are designed on the basis of (a) Rigidity (b) Strength (c) Both of these (d) Either of these

Description : .The shafts are designed on the basis of (a) Rigidity (b) Strength (c) Both of these (d) Either of these

Last Answer : (c) Both of these

The design of shafts made of brittle materials is based on (a) Guest’s theory (b) Rankine’s theory (c) St. Venant’s theory (d) Von Mises Theory

Description : The design of shafts made of brittle materials is based on (a) Guest’s theory (b) Rankine’s theory (c) St. Venant’s theory (d) Von Mises Theory

Last Answer : (b) Rankine’s theory

During preliminary treatment of a sewage A. Oil and grease are removed from skimming tanks B. Floating materials are removed by screening C. Girt and sand are removed by girt chambers D. All the above

Description : During preliminary treatment of a sewage A. Oil and grease are removed from skimming tanks B. Floating materials are removed by screening C. Girt and sand are removed by girt chambers D. All the above

Last Answer : ANS: D

The process of passing water through beds of granular materials, is called (A) Screening (B) Sedimentation (C) Filtration (D) None of these

Description : The process of passing water through beds of granular materials, is called  (A) Screening  (B) Sedimentation  (C) Filtration  (D) None of these 

Last Answer : (C) Filtration 

Cumulative analysis for determining surface is more precise than differential analysis, because of the (A) Assumption that all particles in a single fraction are equal in size (B) Fact that screening is more effective (C) Assumption that all particles in a single fraction are equal in size, is not needed (D) None of these

Description : Cumulative analysis for determining surface is more precise than differential analysis, because of the (A) Assumption that all particles in a single fraction are equal in size (B) Fact that screening is more ... all particles in a single fraction are equal in size, is not needed (D) None of these

Last Answer : (C) Assumption that all particles in a single fraction are equal in size, is not needed

Screen capacity is not a function of (A) Its openings size (B) Screening mechanism (C) Screening surface (D) Atmospheric humidity

Description : Screen capacity is not a function of (A) Its openings size (B) Screening mechanism (C) Screening surface (D) Atmospheric humidity

Last Answer : (D) Atmospheric humidity

Pick out the correct statement. (A) The capacity and the effectiveness of a screen are the same (B) The capacity and the effectiveness of screen are opposing factors (C) The screening surface of a 'reel' (a revolving screen used in flour mills) is made of silk bolting cloth supported by wire mesh (D) Both (B) and (C)

Description : Pick out the correct statement. (A) The capacity and the effectiveness of a screen are the same (B) The capacity and the effectiveness of screen are opposing factors (C) The screening surface of a 'reel' (a ... flour mills) is made of silk bolting cloth supported by wire mesh (D) Both (B) and (C)

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

What are your thoughts and opinions on dash cams?

Description : What are your thoughts and opinions on dash cams?

Last Answer : I can understand why you endorse them. If someone handed me one, I would probably use it, but so far, I feel no compulsion to buy one.

Why so many Accidents on Russian Dash Cams?

Description : Why so many Accidents on Russian Dash Cams?

Last Answer : It is my understanding that scam accidents are common, and it is prudent to have a dash cam in Russia. So it is likely that the dash cam is more common there. And nobody is ... seeing boring extended cuts of Russians driving around accident-free, hence the abundance of crazy Russian youtube clips.

Are there any live cams on wolves?

Description : Are there any live cams on wolves?

Last Answer : answer:This is supposed to be one of the best but, it’s down right now. This one in Minnesota has a few cameras to watch

Invasive slumlord, almost no heat, CO (Carbon Monoxide), broken entrance locks, squatters, some creep coming and going as they please from the apt. unit, and illegal, hidden CCTV spy cams in apt. People of Reddit what would you do?

Description : Invasive slumlord, almost no heat, CO (Carbon Monoxide), broken entrance locks, squatters, some creep coming and going as they please from the apt. unit, and illegal, hidden CCTV spy cams in apt. People of Reddit what would you do?

Last Answer : Move lol