BEARINGS Flashcards
A metallic or synthetic lining for a hole that reduces or prevents abrasion between components of the machine.
a. Bearing
b. Bushing
c. Gasket
d. All of the above
b. Bushing
What type of bearing must be recommended to tighten the belt tension of a bucket elevator?
a. Pillow block bearing
b. Flange bearing
c. Take-up Unit bearing
d. All of the above
c. Take-up Unit bearing
For hanger bearing of a screw conveyor, what type of bearing is recommended?
a. Ball bearing
b. Thrust bearing
c. Tapered bearing
d. Journal bearing
e. None of the above
d. Journal bearing
A type of bearing excellent for heavy radial load and moderate thrust load.
a. Tapered roller bearing
b. Spherical roller bearing
c. Ball bearing
d. None of the above
b. Spherical roller bearing
Which of the following statements is true?
a. Ball bearing operates at a higher speed limit than roller bearing.
b. Roller bearing operates at a higher speed limit than ball bearing.
c. Ball bearing operates at the same speed limit with roller bearing.
d. None of the above
a. Ball bearing operates at a higher speed limit than roller bearing.
A type of bearing with roller length at least 4 times than its diameter and is suitable for heavy load, oscillating and low speed.
a. Cylindrical roller bearing
b. Needle bearing
c. Tapered roller bearing
d. None of the above
b. Needle bearing
A machine element used to keep castellated nut from loosening.
a. Roller pin
b. Spring
c. Cotter pin
d. None of the above
c. Cotter pin
A type of bearing used to restrain endwise motion of a turning shaft or to withstand an axial load.
a. Ball bearing
b. Thrust bearing
c. Roller bearing
d. None of the above
b. Thrust bearing
The bearings used for disk plow bottom are ___.
a. tapered roller bearing
b. spherical roller bearing
c. ball bearing
d. None of the above
a. tapered roller bearing
A type of bearing suitable for heavy radial load and free from axial load.
a. Ball bearing
b. Tapered bearing
c. Cylindrical roller bearing
d. None of the above
c. Cylindrical roller bearing
A type of bearing suitable for both radial and thrust loads.
a. Ball bearing
b. Cylindrical roller bearing
c. Needle bearing
d. None of the above
a. Ball bearing
When high viscosity oil is used in the transmission box of a puddling-type tiller is high, there will be ___ in the system.
a. more heat from liquid friction produce
b. more mechanical friction will occur
c. no friction
d. None of the above
a. more heat from liquid friction produce
When low viscosity oil is used in the transmission box of a puddling type tiller, there will be ___ in the system.
a. more heat produced from liquid friction produce
b. more mechanical friction
c. no friction
d. None of the above
b. more mechanical friction
If the shaft rpm in a transmission box is increase, the coefficient of friction of fluid will ______ .
a. remains the same
b. decrease
c. increase
d. None of the above
c. increase
When designing an axle of a rice thresher, low friction can be attained by making the components to _____ with each other.
a. roll
b. slide
c. skid
d. None of the above
a. roll
The higher the viscosity of a fluid, the ____ is the energy is required to slide the surfaces at a given speed and gap.
a. lesser
b. greater
c. None of the above
b. greater
Lubricants viscosity basically ____ with the increase in temperature.
a. Increases
b. decreases
c. do not change
d. None of the above
b. decreases
It is a measure of an oil viscosity-temperature behavior.
a. Oil Index
b. Viscosity Index
c. V/T Index
d. None of the above
b. Viscosity Index
Viscosity index of SAE 10W-30 oil.
a. 100 V.I.
b. 120 V.I.
c. 140 V.I.
d. None of the above
c. 140 V.I.
Viscosity Index of SAE 10W oil.
a. 100 V.I.
b. 120 V.I.
c. 140 V.I.
d. None of the above
a. 100 V.I.
Multi-grade oils have ___ VI than single grade oil, i.e. the viscosity changes less with temperature.
a. lower
b. middle
c. higher
d. None of the above
c. higher
Basically, oil viscosity ____ with pressure.
a. increases dramatically
b. decreases dramatically
c. do not change
d. None of the above
a. increases dramatically
A bearing is specified as 6204. The first number refers to ____.
a. Size
b. Type
c. Series
d. None of the above
b. Type
A bearing is specified as 6204.
The second number above refers to ____ .
a. Size
b. Type
c. Series
d. None of the above
c. Series
A bearing is specified as 6204.
The two remaining number (3rd and 4th) is in the above specification is ____ .
a. Size
b. Type
c. Series
d. None of the above
a. Size
A bearing is specified as 6204.
What is the size of the bearing
above ____ ?
a. 16 mm
b. 20 mm
c. 25 mm
d. None of the above
b. 20 mm
If a bearing has a designated specification of P206, what size of shaft is suitable for the bearing.
a. 1 in.
b. 1 ¼ in.
c. 1 ½ in.
d. None of the above
b. 1 ¼ in.
What type of bearing must be recommended to tighten the belt tension of a bucket elevator?
a. Pillow block bearing
b. Flange bearing
c. Take-up Unit bearing
d. All of the above
c. Take-up Unit bearing
For hanger bearing of a screw conveyor, what type of bearing is recommended?
a. Ball bearing
b. Thrust bearing
c. Tapered bearing
d. Journal bearing
e. None of the above
d. Journal bearing
Commercially available ball bearings are designated as P305. What is does the letter indicate?
a. Type of bearing unit
b. Type of bearing housing
c. Type of bearing material used
d. None of the above
b. Type of bearing housing
Commercially available ball bearings are designated as P305.
What type of housing does the bearing above?
a. Flange
b. Pillow block
c. Take up unit
d. None of the above
b. Pillow block
Commercially available ball bearings are designated as P305.
What is the size of the bearing above?
a. 20 mm
b. 25 mm
c. 30 mm
d. None of the above
b. 25 mm
A ball bearing has 1500N basic dynamic capacity. During operation, the actual load of the bearing unit is 152N. What is the life of the bearing, in years, if it is to be operated continuously for 4 hrs. a day, 20 days a month and 6 months per year operation? The bearing runs at 1000 rpm.
a. 34.5 years
b. 45.3 years
c. 53.4 years
d. None of the above
a. 34.5 years
In the design of screw conveyor, what type of end bearing is recommended when axial load is significant?
a. Ball bearing
b. Spherical bearing
c. Tapered bearing
d. None of the above
c. Tapered bearing
Using the Nomograph below determine the life of the bearing with 200 kgf actual load. The bearing rotates at 1500 rpm and has 3500 kgf load rating. (Problem 1)
a. Approx 45,000 hours
b. Approx 60,000 hours
c. Approx 56,000 hours
b. Approx 60,000 hours
*A ball and a roller bearings, of the same size, are used to carry the same load of 350 kgf. The rated capacities of the bearings are: 2500 kgf for the ball bearing and 3000 kgf for the roller bearing. What is the rated life of the ball bearing, in number of revolutions (Problem 2)
a. 364.4 x 106 revolutions
b. 453.5 x 106 revolution
c. 526.7 x 106 revolution
d. None of the above
**What is the rated life of the roller bearing above, in number of revolutions (Problem 2)
a. 1065.2 x 106 revolutions
b. 1145.3 x 106 revolutions
c. 1279.6 x 106 revolutions
d. None of the above
a. 364.4 x 106 revolutions
c. 1279.6 x 106 revolutions
*If an NSK-6200 single-row deep groove ball bearing will be used to drive a pulley that delivers 119.8 kgf, how many revolutions will the bearing complete? (Problem 3)
a. 37.22 x 106 rev
b. 40.22 x 106 rev
c. 42.56 x 106 rev
d. None of the above
**If the bearing runs at 1800 rpm, how long will it last (Problem 3)
a. 997.86 hours
b. 1224.78 hours
c. 1453.21 hours
d. None of the above
a. 37.22 x 106 rev
a. 997.86 hours
*If 6200 single-row deep-groove ball bearing will be used to drive the pulley of a machine, what would be the rating fatigue life of the bearing? The pulley has a diameter of 8 in. and transmit 10 hp power at 1800 rpm (Problem 4)
a. 37.22 x 106 rev
b. 40.57 x 106 rev
c. 42.65 x 106 rev
d. None of the above
**What is the actual load applied to the pulley shaft (Problem 4)
a. 101.9 kgf
b. 109.3 kgf
c. 119.8 kgf
d. None of the above
a. 37.22 x 106 rev
c. 119.8 kgf
It is a machine element that supports a load while permitting relative motion between the two elements of the machine.
a. Linkages
b. Chain and sprocket
c. Bearing
d. Shaft
e. None of the above
c. Bearing
ABMA means _____.
a. American Bearing Machinery Association
b. American Bearing Machine Association
c. American Bearing Manufacturer’s Association
d. All of the above
c. American Bearing Manufacturer’s Association
The load which the bearings can be subjected while achieving a rated life of 1 million revolutions.
a. Basic static load
b. Basic dynamic load
c. Bearing life
d. None of the above
b. Basic dynamic load
The load the bearing can withstand without permanent deformation of any component.
a. Basic static load
b. Basic dynamic load
c. Bearing life
d. None of the above
a. Basic static load
Which of the following bearing is suitable for radial load at higher speed.
a. Roller ball bearing
b. Tapered roller bearing
c. Cylindrical roller bearing
d. None of the above
a. Roller ball bearing
Which of the following bearings are suitable for higher radial load at lower speed?
a. Roller ball bearing
b. Tapered roller bearing
c. Cylindrical roller bearing
d. Needle bearing
e. None of the above
c. Cylindrical roller bearing
By adding a second row of balls in a ball bearing, it ___ the radial load carrying capacity of the bearing.
a. decreases
b. increases
c. maintains
d. None of the above
b. increases
It is the type of bearings that gives excellent rating for misalignment capability while retaining the same rating on radial capacity.
a. Needle bearing
b. Cylindrical roller bearing
c. Spherical bearing
d. Tapered roller bearing
e. None of the above
c. Spherical bearing
It is a type of bearings designed to take substantial thrust load along with high radial load.
a. Needle bearing
b. Cylindrical roller bearing
c. Spherical roller bearing
d. Tapered roller bearing
e. None of the above
d. Tapered roller bearing
It is a type of bearings suitable when radial space is smaller to carry a given load.
a. Needle bearing
b. Cylindrical roller bearing
c. Spherical roller bearing
d. Tapered roller bearing
e. None of the above
a. Needle bearing
It is a type of bearing that can take little or no radial load.
a. Thrust bearing
b. Needle bearing
c. Cylindrical roller bearing
d. Tapered roller bearing
e. None of the above
a. Thrust bearing
Class for extra light bearing application.
a. 100
b. 200
c. 300
d. 400
e. None of the above
a. 100
Bearing class for heavy duty application.
a. 100
b. 200
c. 300
d. 400
e. None of the above
d. 400
If the bearing has a bearing number 6205, what is the bearing type?
a. Self aligning ball bearing
b. Deep groove bearing
c. Spherical roller
d. Ball thrust bearing
e. None of the above
a. Self aligning ball bearing
Bearing number: 6205
What is the series of bearing above?
a. 600 series
b. 200 series
c. 500 series
d. None of the above
b. 200 series
Bearing number: 6205
What is the bore diameter of bearing above?
a. 60 mm
b. 20 mm
c. 5 mm
d. 25 mm
e. None of the above
d. 25 mm
The bearing used in the oscillating bin of rotary dryer is designated as P205. What is the type of the bearing housing?
a. Flange
b. Pillow block
c. Rhombus Flange
d. None of the above
b. Pillow block
The bearing used in the oscillating bin of rotary dryer is designated as P205.
What is the diameter of the bearing above?
a. 20 mm
b. 25 mm
c. 30 mm
d. None of the above
b. 25 mm
