Mechanical Engineering Answers

15. The tooth thickness of a gear is 0.5 in. and its circular pitch 1.0 in. Calculate the dedendum of the gear. (SHOW ANSWER AND SOLUTION)

8. Find the standard distance between sprocket having 4 in and 16 in diameters. (SHOW ANSWER AND SOLUTION)

8. Find the standard distance between sprocket having 4 in and 16 in diameters.

7. A chain with speed 800 fpm has driving sprocket turns at 900 rpm. If the pitch of chain is ¾ in, find the number of teeth of driving sprocket. (SHOW ANSWER AND SOLUTION)

13. A pump that operates a head of 30 m is used to deliver 80 liters per second of water at an efficiency of 85%. The pump is driven by a diesel engine by means of chain and sprocket with a service factor of 1.3. If horsepower per strand is 25, find the approximate number of strands needed. (SHOW ANSWER AND SOLUTION)

In an ideal constant volume cycle, the pressure and temperature at the beginning of Compressions are 97 kN/m2 and 40°C, respectively. The compression ratio is 7: 1. The heat supplied during the cycle is 1200 kJ/kg of working fluid. Determine (a) the maximum temperature attained in the cycle, (b) the thermal efficiency of the cycle, and (c) the work done during the cycle/kg of working fluid. Assume ɤ = 1.4 and Cv, = 0.718 kJ/kg K

A boiler uses 18 kg air per kg of fuel. Determine the minimum height of

chimney required to produce a draught of 25 mm of water. The mean

temperature of chimney gases is 335° C and that of outside air 22° C.

Explain why it is mandatory to use mountings not accessories in Boilers?

What are the reasons of recent boiler explosion in Bangladesh?

How to overcome this situation?

Determine the force in each member of the truss shown. State whether each member is in tension or compression and tabulate the results. 

2. Determine the moments of inertia Ix and Iy of the shaded area, with respect to an axis passing through GH

and FH respectively.