Bending stress in graduated length leaves are more than that in full length leaves.
a) Yes
b) No
c) In some cases
d) Can’t be stated
Answer: b
Explanation: Bending stress in full length leaves is around 50% higher than graduated length leaves.
Option b.
Bending stress in. full length leaves is around 50% higher compared to that in graduated length leaves.
A leaf spring consists of 3 extra full length leaves and 14 graduated length leaves. The maximum force that can act on the spring is 70kN and the distance between eyes of the spring is 1.2m. Width and thickness of the leaves are 100mm and 12mm respectively. Calculate the initial pre load required to close the nip.a) 4332.2Nb) 4674.1Nc) 4985.4Nd) Can’t be determined
Velocity ratio for chain drive is lesser than that for belts.a) Yesb) Noc) In some casesd) Can’t be determined
There is problem of alignment in deep groove ball bearings.a) Yesb) No, it is self-aligningc) It aligns itself only in some particular casesd) Can’t be determined
A leaf spring consists of 3 extra full length leaves and 14 graduated length leaves. The maximum force that can act on the spring is 70kN and the distance between eyes of the spring is 1.2m. Width and thickness of the leaves are 100mm and 12mm respectively. If modulus of elasticity is 207000N/mm², calculate the initial nip.a) 26.8mmb) 24.9mmc) 22.5mmd) 23.1mm
V threads are highly recommended for fastening as well as power transmission purpose.a) Yesb) Neverc) In some casesd) Can’t be stated
Are the bolts 2 and 3 under same force?a) Yesb) Noc) Depends on nature of force whether it is of shear or bending in natured) Can’t be determined
The velocity of the chain is always constant in case of chain drive.a) Yesb) No, it can never be constantc) It is constant above a particular valued) Can’t be stated
The angular play bearing must be mounted without axial play.a) Yesb) Little tolerance is adjustedc) Little tolerance is necessaryd) Can’t be stated
Fitted bearing must be partial bearing.a) Trueb) Noc) No lubricating space is requiredd) Can’t be stated
Nipping is defined as leaving the gap between full length leaf and graduated length leaf.a) Trueb) False