Course/Branch : B,E.,
MECHANICAL
ENGINEERING
Year / Semester : III/ V
Format
No.
Subject Code
Subject Name
Rev.
No.
Date
Unit No
: ME8593
V
: DESIGN OG MACHINE ELEMENTS
Unit Name : BEARINGS
NAC/TLP-07a.13
02
30.09.2020
OBJECTIVE TYPE QUESTION BANK
S.
No.
1
2
3
4
5
6
7
8
9
Objective Questions (MCQ /True or False / Fill up with Choices )
The following is (are) the example(s) of Plain bearing(s).
a. Thrust bearing
b. Linear bearing
c. Journal bearing
d. All of the above
The following type(s) of bearing(s) have no rolling element.
a. Thrust bearing
b. Linear bearing
c. Journal bearing
d. All of the above
Which type of bearing(s) provides a bearing surface for forces acting along axis to the shaft?
a. Thrust bearing
b. Journal bearing
c. Linear bearing
d. None of the above
A sleeve bearing of inch dimensions is numbered as XXYY-ZZ, using the SAE numbering
system. What does YY represents.
a. Internal diameter in sixteenths of inch
b. Internal diameter in inch
c. External diameter in sixteenths of inch
d. External diameter in inch
The type of bearing used in crankshaft is
a. Plain bearing
b. Roller bearing
c. Ball bearing
Magnetic bearing
Babbitt is used
a. Usually to make integral bearings
b. to not to damage the journal bearing during direct contact
c. to collect any contaminants in the lubrication
d. All of the above
For Ovens and dryers, the following material is used to make bearings
a. Babbitt
b. Graphite alloy
c. Cast iron
d. Bronze
The lubrication in which load of bearing is carried solely by a film of fluid and there is no
contact between the two bearings surface is called
a. Full film condition
b. Boundary condition
c. Dry condition
d. None of the above
The lubrication in which load of bearing is carried partly by a film of fluid and partly by direct
surface contact is called
BTL
L1
L1
L2
L4
L3
L3
L2
L2
L1
Page 1 of
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Course/Branch : B,E.,
MECHANICAL
ENGINEERING
Year / Semester : III/ V
Format
No.
Subject Code
Subject Name
Rev.
No.
Date
Unit No
: ME8593
V
: DESIGN OG MACHINE ELEMENTS
Unit Name : BEARINGS
NAC/TLP-07a.13
02
30.09.2020
OBJECTIVE TYPE QUESTION BANK
10
11
12
13
14
15
16
17
18
a. Full film condition
b. Boundary condition
c. Dry condition
d. None of the above
When the load of bearing is carried by direct surface to surface contact is called
a. Full film condition
b. Boundary condition
c. Dry condition
d. None of the above
Hydrostatic bearing usually use
as lubricant
a. Oil
b. Grease
c. Nothing
d. Any of the above
Hydrostatic bearing enters Hydrodynamic state when the journal is
a. Stationery
b. Rotating
c. Both ‘a’ and ‘b’
d. None of the above
The location of journal is measured by
a. Attitude angle
b. Pressure angle
c. Wedge angle
d. None of the above
The attitude angle and eccentricity ratio are dependent on the
a. Direction
b. Speed of rotation
c. The load
d. All of the above
A self-excited vibration of the journal is called
a. Oil whirl
b. Shaft whirl
c. Journal whirl
d. Bearing whirl
Oil whirl in journal bearing can be prevented by
a. Providing an obstacle to whirling fluid
b. Providing stabilizing load to minimize whirl
c. Both ‘a’ and ‘b’
d. None of the above
In order to prevent oil whirl in journal bearing, there is a shallow relief cut in the center of the
bearing over the
half of the bearing.
a. Top
b. Bottom
c. Both ‘a’ and ‘b’
None of the above
Which of the following design eliminate the oil whirl completely?
L2
L2
L1
L2
L2
L2
L3
L2
L1
Page 2 of
4
Course/Branch : B,E.,
MECHANICAL
ENGINEERING
Year / Semester : III/ V
Format
No.
Subject Code
Subject Name
Rev.
No.
Date
Unit No
: ME8593
V
: DESIGN OG MACHINE ELEMENTS
Unit Name : BEARINGS
NAC/TLP-07a.13
02
30.09.2020
OBJECTIVE TYPE QUESTION BANK
19
20
21
22
23
a. Tilting pad
b. Pressure dam
c. Stabilizing force
d. All of the above
Which of the following are functions of bearings?
a)
Ensure free rotation of shaft with minimum friction
b) Holding shaft in a correct position
c) Transmit the force of the shaft to the frame
d) All of the listed
Which of the following are true about plasticity?
a)
Permanent Deformation
b)
Ability to retain deformation under load or after removal of load
c)
Plastic deformation is greater than elastic deformation
d) All of the mentioned
In gear boxes and small size motors, rolling contact bearings are used.
a) True
b) False
Modulus of resilience is defined as
a)
Strain energy per unit volume
b) Strain energy per unit area
c)
Independent of strain energy
d) None of the mentioned
Which of the following facts are true for resilience?
a) Ability of material to absorb energy when deformed elastically
b) Ability to retain deformation under the application of load or after removal of load
c) Ability of material to absorb energy when deformed plastically
d) None of the mentioned
In the graph shown, which regions point the partial metal to metal contact.
24
25
L3
L3
L2
L4
L2
L4
a) BC
b) CD
c) Both BC and CD
d) Can’t be determined
Hydrodynamic lubrication takes place in region?
L4
Page 3 of
4
Course/Branch : B,E.,
MECHANICAL
ENGINEERING
Year / Semester : III/ V
Format
No.
Subject Code
Subject Name
Rev.
No.
Date
Unit No
: ME8593
V
: DESIGN OG MACHINE ELEMENTS
Unit Name : BEARINGS
NAC/TLP-07a.13
02
30.09.2020
OBJECTIVE TYPE QUESTION BANK
a)
b)
c)
d)
BC
CD
Both BC and CD
None of the mentioned
Page 4 of
4