Mechanical Engineering Written Exam Questions (BIWTA)

Mechanical Engineering Written Exam Questions (BIWTA)

Company- Bangladesh Inland Water Transport Authority (BIWTA)

Post- Assistant Engineer-Mechanical

    ➦ What is “ton of refrigeration (TR)”
    ➦ Define boiler mountings with examples.
    ➦ Define boiler accessories with examples. 
    ➦ Write down the four laws of thermodynamics.
    ➦ Draw the typical stress-strain diagram of mild steel showing proportional limit, yield strength, ultimate strength and breaking strength on it. 
    ➦ Define modulus of elasticity and modulus of rigidity. For a material which one is greater? 
    ➦ A solid steel shaft in a rolling mill transmits 20 kW at 2 Hz. Determine the diameter of the shaft if the shearing stress in not to exceed 40MPa.  
    ➦ 

A uniformly distributed load of magnitude w is applied over the whole span of a simply supported beam of length L. Draw the shear force and bending moment diagrams of the beam. 

    ➦ A furnace wall of thickness 1 m and of surface area 2 m² is made of a material whose thermal conductivity is 20 W/m.K. The temperatures of the inner and outer surfaces of the wall are 10000⁰C and 2000⁰C, respectively. Determine the heat flow through the wall.