Mechanical Engineering Answers

A tank holding milk has an elliptical manhole in it. The top of the manhole is 1.25m below the surface of the milk. The manhole is 750mm wide and 800mm high. Using the analytical method calculate the total force on the manhole and where it acts. The milk has an s.g of 1.026

Please explain the following nouns and takean example（5 point seach)

1.

Mechanism

2.

Kinematic Pair

a 40mm hole is drilled at a speed of 30 m/min and feed of 0.1 mm tooth calculate feed per minute

a tool will cut for 6 hours before it needed sharpening it takes 20 minutes to change the tool if the tool can be sharpened 12 times before it is discarded determine the unit tool change time per cycle"

a refrigerating plant is required to produce 2.5 tonnes of ice per day at -4°c from water at 20°c if the temperature range in the compressor is between 25°c and -6°c calculate power required to drive the compressor latent heat of ice= 335 kj/kg and specific heat of ice = 2.1 kj/kg k

1. Investigate and explain the procedure by which mechanical engineers or motor machanics fasten bolts using a ratchet.

2. What is the function of a feeler gauge

3. Difference between a vice grip and a wrench in terms of their structure and function s.

4. Why do some mechanics use allen keys instead of self-tapping screws to fasten joints.

5. Explain the method by which a micrometre is used to determine the depth or size of an object.

6. Describe why engineers or technicians may prefer a vernier calliper to other measuring instruments

a steam jet refrigeration system the motive steam expand in the mcq

How does error differ from an uncertainty

A vapour power plant working on Rankine cycle operates between boiler pressure of 500KN/M2 and condenser pressure of 0.06 bar calculate (1) The Thermal Efficiency (2) Work ratio (3) Specific steam consumption for the cycle.

A gas in a closed system is taken through a cyclic process. First it is heated isochorically with heat absorption of 100 kJ. Then it is compressed adiabatically to its initial pressure while work done on the gas is 70 kJ. Finally it is allowed to expand isobarically with heat rejection of 120 kJ. The initial internal energy is 150 kJ. Determine internal energy at all end states. equation.