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The shaft, as given in Figure is driven by pulley B from an electric motor. Another belt drive from pulley A is operating a compressor. The belt tensions for pulley A are 1500 N and 600 N. The ratio of belt tensions for pulley B is 3.5. The diameter d of pulley A is 150 mm and the diameter d of pulley B is 480 mm. The maximum allowable tensile stress for the shaft material is 170 MPa and the allowable shear stress is 85 MPa. Taking bending and torsion factors as 1.25 and 1.75 respectively, Evaluate the shaft diameter. Also search out the dimensions for a hollow shaft with outside diameter limited to 30 mm. Compare the weights of the two shafts.
Q. Show Maximum Allowable Working Pressure? The MAWP to be marked on the Section VIII nameplate is defined as the maximum gauge pressure permissible at the top of a completed v
The crate A of weight W=27lb is being pulled to the right by the winch at B. The crate starts at x=0 and is pulled a total distance 15ft over the rough surface for which the coeffi
a) State FOUR factors that affect the effectiveness of hydrodynamic lubrication as a means of reducing friction between components. b) Under what conditions would boundary lubri
Q. Show PMI testing of alloy materials? Suppliers and Construction Subcontractors are required to verify or conduct PMI testing of alloy materials that they procure and use and
DUTY CYCLE RATING Since, arc welding power sources are delivering high currents for welding; the components of such a system are bound to get heated. In order to have increase
law of belting
(a) Describe and calculate i) Humidity Ratio ii) DPT iii) Relative Humidity iv) Density v) Enthalpy of atmosphere air when DBT is 35 0 C, WBT is 23 0 C and the ba
Fuse : Fuse wire is made of soft metal and housed in a glass tube. It is connected in circuit. It protects the electrical accessories, which may be damaged by the overflow o
What is specific gravity? what do you mean by 1pascal? Concept of pressure difference? Sol) The "specific gravity" of a meterial is the ratio of its density to the density of
(i) Describe Poisson's Ratio. (ii) A circular rod of 100mm diameter and 500 mm length is subjected to a tensile force of 1000 KN. Calculate the modulus of bulk modulus, rigidity
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