Deck 5: Mechanical Engineering Bearings and Gears

Question 1

The gears on camshaft and crankshaft are known as

A)lining gears
B)aligning gears
C)timing gears
D)tuning gears

Answer 1

timing gears

Question 2

The material known as high carbon high copper chrome silicon cast steel is used for making

A)camshaft
B)cylinder body
C)cylinder head
D)piston

Answer 2

camshaft

Question 3

Camshaft gear is made from which material

A)cast iron
B)mild steel
C)bakelite
D)brass

Answer 3

bakelite

Question 4

The main reasons for crankshaft wear are

A)different loads at some points of rotation
B)centrifugal forces due to crankshaft rotation
C)misalignment in connecting rod
D)all of the mentioned

Question 5

The main causes of crankshaft vibration are

A)variation in torque
B)cyclic variation of gas and combustion products
C)unbalanced weight of parts
D)all of the mentioned

Question 6

In the cam, the distance between the base circle and the nose is called

A)lift
B)lobe
C)flank
D)pitch

Question 7

The crankshaft rotates the camshaft using

A)belt drive
B)chain drive
C)gear drive
D)motor drive

Question 8

The crankshaft should be inspected for

A)cracks
B)alignment of crankpins and journals
C)cleanliness of oil gallaries
D)all of the mentioned

Question 9

A radial bearing supports the load that acts along the axis of the shaft.

Question 10

Sliding contact bearings, also called plain bearings have no problem of wear.

Question 11

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

Question 12

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

Question 13

In gear boxes and small size motors, rolling contact bearings are used.

Question 14

There is 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

Question 15

Deep groove ball bearing has immense rigidity.

A)true
B)no it has point contact and hence low rigidity
C)it has surface contact
D)it has line contact

Question 16

Cylindrical load bearing has lower load capacity as compared to deep groove ball bearing.

Question 17

Angular contact bearing can take thrust as well as radial loads.

Question 18

The angular play bearing must be mounted without axial play.

A)yes
B)little tolerance is adjusted
C)little tolerance is necessary
D)can't be stated

Question 19

Taper rolling supports

A)axial loads
B)thrust loads
C)both axial and thrust loads
D)none of the mentioned

Question 20

Which of the following cannot tolerate misalignment?

A)angular contact bearing
B)cylinder roller bearing
C)thrust ball bearings
D)all of the listed

Question 21

Cylinder roller creates lesser noise than deep groove ball bearing.

Question 22

Straight bevel gears are easy to design and manufacture and give reasonably good service with quieter operation.

A)true
B)no, noise problem
C)no, vibration problem
D)none of the listed

Question 23

Which of the following creates smoother motion?

A)straight bevel gears
B)spiral bevel gears
C)equal for straight and spiral
D)none of the mentioned

Question 24

When the pitch angle is greater than 90?, it is called external bevel gear.

A)true
B)internal
C)helical
D)herringbone

Question 25

If pitch angle is >90, the bevel gear is?

A)internal
B)external
C)crown
D)static