The rolling contact bearings are known as (a) thick lubricated bearings (b) plastic bearings (c) thin lubricated bearings (d) antifriction bearings

The rolling contact bearings are known as

(a) thick lubricated bearings

(b) plastic bearings

(c) thin lubricated bearings

(d) antifriction bearings
by

1 Answer

Answer :

(d) antifriction bearings
by

Related questions

Antifriction bearings are (a) thick lubricated bearings (b) plastic bearings (c) ball and roller bearings (d) thin lubricated bearings

Description : Antifriction bearings are (a) thick lubricated bearings (b) plastic bearings (c) ball and roller bearings (d) thin lubricated bearings

Last Answer : (c) ball and roller bearings

Rolling contact bearing is also called as A. Plastic bearing B. Thin lubrication bearing C. Thick lubrication bearing D. Antifriction bearing.

Description : Rolling contact bearing is also called as A. Plastic bearing B. Thin lubrication bearing C. Thick lubrication bearing D. Antifriction bearing.

Last Answer : D. Antifriction bearing.

Antifriction bearings are (a) sleeve bearings (b) hydrodynamic bearings (c) thin lubricated bearings (d) none of the mentioned

Description : Antifriction bearings are (a) sleeve bearings (b) hydrodynamic bearings (c) thin lubricated bearings (d) none of the mentioned

Last Answer : (d) none of the mentioned

Antifriction bearings are A. Sleeve bearings B. Hydrodynamic bearings C. Thin lubricated bearings D. None of the above

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Which bearing is Antifriction bearing A. Thick lubrication bearing B. Thin lubrication bearing C. Rolling or ball bearing D. None

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Boundary lubricated bearing is (A) Thick film bearing (B) Thin film bearing (C) Hydrodynamic bearing (D) Hydrostatic bearing

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The antifriction bearings (a) have low starting and low running friction at moderate speeds (b) have a high initial cost (c) can carry both radial and thrust loads (d) all the mentioned

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Which one of the following pair is correctly matched? [IES-2000] (a) Beauchamp tower ........................First experiments on journal bearings (b) Osborne Reynolds ........................Antifriction bearings (c) Somerfield number........................Pivot and Collar bearings (d) Ball bearings...............................Hydrodynamic lubrication

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Last Answer : (a) Beauchamp tower ........................First experiments on journal bearings

An antifriction bearing consists of (a) rolling elements (b) races (c) cages (d) all of the listed

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The rolling contact bearings as compared to sliding contact bearings have (a) small overall dimensions (b) accuracy of shaft alignment (c) low starting and low running friction except at very high speeds (d) all the mentioned

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. In gear boxes and small size motors, rolling contact bearings are used. a) True b) False

Description : . In gear boxes and small size motors, rolling contact bearings are used. a) True b) False

Last Answer : a) True

In steam and gas turbines, rolling contact bearings are used. a) True b) False

Description : In steam and gas turbines, rolling contact bearings are used. a) True b) False

Last Answer : b) False

Muff coupling is designed as a ......... A. Thick cylinder B. Thin cylinder C. Solid shaft D. Hollow shaft

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The purpose of lubrication in an antifriction bearing is (a) to reduce the friction between balls and races (b) dissipation of frictional heat prevention of corrosion (c) protection of the bearing from dirt and other foreign particles (d) all of the mentioned

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Last Answer : (d) all of the mentioned

Which of the following is an antifriction bearing? (a) journal bearing (b) collar bearing (c) needle bearing (d) pivot bearing

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Which of the following cannot tolerate misalignment? (a) Angular contact bearing (b) Cylinder roller bearing (c) Thrust ball bearings (d) All of the listed

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Last Answer : (d) All of the listed

Which of the bearings given below SHOULD NOT be subjected to a thrust load? (a) Deep groove ball bearing (b) Angular contact ball bearing (c) Cylindrical (straight) roller bearing (d) Single row tapered roller bearing

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Last Answer : (c) Cylindrical (straight) roller bearing

In angular contact bearings, ____ bearings are required to take thrust load in both directions. (a) 1 (b) 2 (c) 3 (d) 4

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Last Answer : (b) 2

Match List I with List II and select the : [IES-2002] List I (Bearings) List II (Load type) A. Hydrodynamic Journal bearing 1. High radial and thrust load combined B. Rectangular Hydrostatic bearing 2. Radial load only C. Taper Roller bearing 3. Thrust load only D. Angular contact ball bearing 4. Medium to low radial and thrust combined A B C D A B C D (a) 2 3 1 4 (b) 4 1 3 2 (c) 2 1 3 4 (d) 4 3 1 2

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Last Answer : (a) 2 3 1 4

In sliding contact bearings, a positive pressure can be built up and a load supported by a fluid only by the use of a: [IES-2005] (a) Diverging film (b) Converging-diverging film (c) Converging film (d) Flat film

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Which of the following cannot tolerate misalignment? a) Angular contact bearing b) Cylinder roller bearing c) Thrust ball bearings d) All of the listed

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In angular contact bearings, ____ bearings are required to take thrust load in both directions. a) 1 b) 4 c) 2 d) 3

Description : In angular contact bearings, ____ bearings are required to take thrust load in both directions. a) 1 b) 4 c) 2 d) 3

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Sliding contact bearings, also called plain bearings have no problem of wear. a) True b) False

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In an oil-lubricated journal bearing, coefficient of friction between the journal and the bearing. [IES-1995] (a) Remains constant at all speeds. (b) is minimum at zero speed and increases monotonically with increase in speed. (c) is maximum at zero speed and decreases monotonically with increase in speed. (d) becomes minimum at an optimum speed and then increases with further increase in speed.

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Last Answer : (d) becomes minimum at an optimum speed and then increases with further increase in speed.

_______is suitable as a lubricant for heavy-duty applications of rolling contact bearing. (a) Grease (b) Lubricating oil (c) Graphite (d) Air

Description : _______is suitable as a lubricant for heavy-duty applications of rolling contact bearing. (a) Grease (b) Lubricating oil (c) Graphite (d) Air

Last Answer : (b) Lubricating oil

________is suitable as a lubricant for low and moderate loads applications of rolling contact bearing. (a) Grease (b) Lubricating oil (c) Graphite (d) Air

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A rolling contact bearing is specified as X307. Calculate the bearing diameter. (a) 35 mm (b) 28 mm (c) 21 mm (d) 7 mm

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Last Answer : (a) 35 mm

A journal bearing is a ______ contact bearing working on the hydrodynamic lubrication and which supports load in____ direction. a) Sliding, Axial b) Rolling, Radial c) Sliding, Radial d) Rolling, Axial

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Last Answer : c) Sliding, Radial

A rolling contact bearing is specified as X307. Determine the series. a) Extra light series b) Light series c) Medium series d) Heavy series

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Last Answer : c) Medium series

Babbitt lining is used on brass/bronze bearings to increase the (A) Antifriction properties (B) Compressive strength (C) Bearing resistance

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Last Answer : Option D

A thick film bearing is a bearing (A) Where the surfaces of journal and the bearing are completely separated by a film of lubricant (B) Where the surfaces of journal and the bearing are partially separated by a film of lubricant and there is partial metal to metal contact (C) Where the surfaces of journal and the bearing are separated by a film created by elastic deflection of parts (D) Where there is no lubricant

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Last Answer : (A) Where the surfaces of journal and the bearing are completely separated by a film of lubricant

A zero film bearing is a bearing (A) Where the surfaces of journal and the bearing are separated by a thick film of lubricant (B) Where the surfaces of journal and the bearing are partially separated by a film of lubricant and there is partial metal to metal contact (C) Where the surfaces of journal and the bearing are separated by a film created by elastic deflection of parts (D) Where there is no lubricant

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Last Answer : (D) Where there is no lubricant

A thin film bearing is a bearing (A) Where the surfaces of journal and the bearing are completely separated by a film of lubricant (B) Where the surfaces of journal and the bearing are partially separated by a film of lubricant and there is partial metal to metal contact (C) Where the surfaces of journal and the bearing are separated by a film created by elastic deflection of parts (D) Where there is no lubricant

Description : A thin film bearing is a bearing (A) Where the surfaces of journal and the bearing are completely separated by a film of lubricant (B) Where the surfaces of journal and the bearing are partially ... are separated by a film created by elastic deflection of parts (D) Where there is no lubricant

Last Answer : (B) Where the surfaces of journal and the bearing are partially separated by a film of lubricant and there is partial metal to metal contact

The ability of a material to be formed by hammering or rolling is known as _________ a) Malleability b) Ductility c) Harness d) Brittleness

Description : The ability of a material to be formed by hammering or rolling is known as _________ a) Malleability b) Ductility c) Harness d) Brittleness

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Ball bearings are, usually, made from (a) low carbon steel (b) high carbon steel (c) medium carbon steel (d) chrome steel

Description : Ball bearings are, usually, made from (a) low carbon steel (b) high carbon steel (c) medium carbon steel (d) chrome steel

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The ball bearing is subjected to a radial load of 4000 N. Expected life for 90% bearings is 9000 hr and the shaft is rot (a) 42.21 kN (b) 37.29 kN (c) 26.33 kN (d) 35.22 kN

Description : The ball bearing is subjected to a radial load of 4000 N. Expected life for 90% bearings is 9000 hr and the shaft is rot (a) 42.21 kN (b) 37.29 kN (c) 26.33 kN (d) 35.22 kN

Last Answer : (b) 37.29 kN

Calculate the bearing life if expected life for 90% bearings is 9000 hr and the shaft is rotating at 1500 rpm. (a) 850 million rev (b) 810 million rev (c) 810 hr (d) 850 hr

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The dynamic load-carrying capacity of a bearing is defined as the radial load in radial bearings that can be carried for a minimum life of 1000 revolutions. (a) True (b) False

Description : The dynamic load-carrying capacity of a bearing is defined as the radial load in radial bearings that can be carried for a minimum life of 1000 revolutions. (a) True (b) False

Last Answer : (b) False

For the majority of bearings, actual life is considerably greater than rated life. (a) True (b) False

Description : For the majority of bearings, actual life is considerably greater than rated life. (a) True (b) False

Last Answer : (a) True

The bearings of medium series have capacity __________ over the light series. (a) 10 to 20% (b) 20 to 30% (c) 30 to 40% (d) 40 to 50%

Description : The bearings of medium series have capacity __________ over the light series. (a) 10 to 20% (b) 20 to 30% (c) 30 to 40% (d) 40 to 50%

Last Answer : (c) 30 to 40%

The bearings of heavy series have capacity __________ over the medium series. (a) 10 to 20% (b) 20 to 30% (c) 30 to 40% (d) 40 to 50%

Description : The bearings of heavy series have capacity __________ over the medium series. (a) 10 to 20% (b) 20 to 30% (c) 30 to 40% (d) 40 to 50%

Last Answer : (b) 20 to 30%

Which of the following elements is not used as a roller in roller bearings? (a) Cylindrical (b) Taper (c) Spherical (d) None of the mentioned

Description : Which of the following elements is not used as a roller in roller bearings? (a) Cylindrical (b) Taper (c) Spherical (d) None of the mentioned

Last Answer : (d) None of the mentioned

The piston pin bearings in heavy-duty diesel engines are (a) needle roller bearings (b) tapered roller bearings (c) spherical roller bearings (d) cylindrical roller bearings

Description : The piston pin bearings in heavy-duty diesel engines are (a) needle roller bearings (b) tapered roller bearings (c) spherical roller bearings (d) cylindrical roller bearings

Last Answer : (a) needle roller bearings

The construction feature which makes tapered roller bearings unique in that races are (a) attachable (b) separable (c) self-aligning (d) none of the mentioned

Description : The construction feature which makes tapered roller bearings unique in that races are (a) attachable (b) separable (c) self-aligning (d) none of the mentioned

Last Answer : (b) separable

Tapered roller bearings can take (a) radial load only (b) axial load only (c) both radial and axial loads and the ratio of these being greater than unity (d) both radial and axial loads and the ratio of these being less than unity

Description : Tapered roller bearings can take (a) radial load only (b) axial load only (c) both radial and axial loads and the ratio of these being greater than unity (d) both radial and axial loads and the ratio of these being less than unity

Last Answer : (c) both radial and axial loads and the ratio of these being greater than unity

Which of the following bearings carry thrust load in one direction? (a) Spherical roller thrust bearings (b) Taper roller bearings (c) Spherical roller thrust bearings and taper roller bearings (d) none of the mentioned

Description : Which of the following bearings carry thrust load in one direction? (a) Spherical roller thrust bearings (b) Taper roller bearings (c) Spherical roller thrust bearings and taper roller bearings (d) none of the mentioned

Last Answer : (c) Spherical roller thrust bearings and taper roller bearings

In standard taper roller bearings, the angle of taper of the outer raceway is (a) 5° (b) 8° (c) 15° (d) 25°

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Last Answer : (d) 25°

Deep groove ball bearings are used for (a) heavy thrust load only (b) the small angular displacement of shafts (c) radial load at high speed (d) combined thrust and radial loads at high speed

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Last Answer : (d) combined thrust and radial loads at high speed

There is a problem of alignment in deep groove ball bearings. (a) Yes (b) No, it is self-aligning (c) It aligns itself only in some particular cases (d) Can’t be determined

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Last Answer : (a) Yes