Machine Design The maximum stress due to stress concentration in a bar having circular transverse hole, as compared to its static stress without hole will be 4 times more Same in both cases 3 times more 2 times more 4 times more Same in both cases 3 times more 2 times more ANSWER DOWNLOAD EXAMIANS APP
Machine Design Residual stress in materials Is always harmful Is independent of external loads Becomes zero when external load is removed Acts when external load is applied Is always harmful Is independent of external loads Becomes zero when external load is removed Acts when external load is applied ANSWER DOWNLOAD EXAMIANS APP
Machine Design The rolling contact bearings as compared to sliding contact bearings have Low starting and low running friction except at very high speeds Small overall dimensions All of these Accuracy of shaft alignment Low starting and low running friction except at very high speeds Small overall dimensions All of these Accuracy of shaft alignment ANSWER DOWNLOAD EXAMIANS APP
Machine Design In order to ensure self locking in a screw jack, it is essential that helix angle is __________ friction angle. Equal to Larger than Smaller than None of these Equal to Larger than Smaller than None of these ANSWER DOWNLOAD EXAMIANS APP
Machine Design When a hole of diameter ‘d’ is punched in a metal of thickness 't', then the force required to punch a hole is equal to (where τu = Ultimate shear strength of the material of the plate) π/4 × d² × tτu t.τu π/4 × d².τu πd.t.τu π/4 × d² × tτu t.τu π/4 × d².τu πd.t.τu ANSWER DOWNLOAD EXAMIANS APP
Machine Design According to maximum normal stress theory, the maximum normal stress in the shaft is (1/2) × [σ + √(σ² × 4τ²)] √(σ² × 4τ²) (1/2) × √(σ² × 4τ²) σ + √(σ² × 4τ²) (1/2) × [σ + √(σ² × 4τ²)] √(σ² × 4τ²) (1/2) × √(σ² × 4τ²) σ + √(σ² × 4τ²) ANSWER DOWNLOAD EXAMIANS APP
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