Mechanical Engineering Questions And Answers :: Machine Design: part5



Mechanical Engineering : Machine Design QUESTIONS AND ANSWERS :: part5 : 6 to 10

Following Mechanical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :

6.I.S. specifies following total number of grades of tolerances

18
16
20
22
14.

7.In oiliness bearings

the oil film pressure is generated only by the rotation of the journal
the oil film is maintained by supplying oil under pressure
do not require external supply of lubricant
grease required to be applied after some intervals
none of the above.

8.In hydrodynamic bearings

the oil film pressure is generated only by the rotation of the journal
the oil film is maintained by supplying oil under pressure
do not require external supply of lubricant
grease is used for lubrication
none of the above.

9.In hydrostatic bearings

the Oil film pressure is generated only by the rotation of the journal
the oil film is maintained by supplying oil under pressure
do not require external supply of lubricant
grease is used for lubrication
none of the above.

10.The usual clearance provided in hydrodynamic bearing per mm of diameter of shaft is

0.01 micron
0.1 micron
1 micron
10 microns
25 microns.

More Machine Design QUESTIONS AND ANSWERS available in next pages

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