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Machine Design

Machine Design
A single strap butt joint is always in __________ shear.

Triple share
Double
Single
None of these

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Machine Design
The notch sensitivity q is expressed in terms of fatigue stress concentration factor Kf and theoretical stress concentration factor Kt as

(Kt + 1)/ (Kf + 1)
(Kf + 1)/ (Kt + 1)
(Kt - 1)/ (Kf - 1)
(Kf - 1)/ (Kt - 1)

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Machine Design
According to maximum normal stress theory, the maximum normal stress in the shaft is

(1/2) × √(σ² × 4τ²)
(1/2) × [σ + √(σ² × 4τ²)]
σ + √(σ² × 4τ²)
√(σ² × 4τ²)

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Machine Design
Tearing resistance required to tear off the plate per pitch length is (where p = Pitch of rivets, d = Dia. of rivet hole, and σt = Permissible tensile stress for plate material)

(p - d) t.σt
p.t.σt
p.d.σt

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Machine Design
The following type of nut is used with alien bolt

Hexagonal nut
Slotted nut
Any one of the above
Castle nut

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Machine Design
In block brakes, the ratio of shoe width to wheel diameter is taken between

0.25 and 0.50
0.75 and 1
0.1 and 0.25
0.50 and 0.75

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