If the line of best fit for your torque speed curve is described by the following equation, calculate the no-load speed of the motor. T= -0.021x+0.32

1. What is ABNORMAL EVENTS?

2. What is MODIFICATIONS?

3. What is CERTIFICATE OF RELEASE TO SERVICE?

4. Who is TYPE DESIGN ORGANIZATION? GIVE SAMPLE

5. What is the difference between CONFIGURATION DEVIATION LIST and MINIMUM EQUIPMENT list?

Explain Failure mode effect analysis (FMEA) .When you design seat of rickshow.

Estimate the number for stages required for the turbine which is a multi-stage axial turbine designed with impulse stages and operating with an inlet pressure and temperature of 6 bar and 900 K and outlet pressure of 1 bar.

The isentropic efficiency of the turbine is 85 %.

All the stages are to have a nozzle outlet angle of 75 degrees and equal inlet and outlet rotor blade angles.

Mean blade speed is 250 m/s and the axial velocity is 150 m/s and is a constant across the turbine.

This is problem 7-15 from El-Wakil’s Powerplant Technology book -- a spray pond is used to cool a 200-MW powerplant that has a 39 percent efficiency. The condenser cooling water outlet temperature is 90 degF. The atmosphere is at 70 degF and 60 percent relative humidity. The spray nozzles have ntu = 0.15, r = 0.015 and f = 0.25. Determine (a) the number of spray modules required, (b) the flow per module, in gallons per minute, and (c) the approximate pond area, in acres.

What is the importance of ice protection on the aircraft and what do you think is the best way to prevent ice forming on the aircraft on ground and inflight?

This is problem 7-3 from El-Wakil’s Powerplant Technology book -- a natural-draft cooling tower is 450 ft high. Air enters the tower at 14.696 psia, 50°F, and 50 percent relative humidity and leaves in a saturated condition. The pressure drop in the tower is 0.015 psi. Calculate (a) the air exit temperature, in degrees Fahrenheit, and (b) the makeup due to evaporation, in pound mass per pound mass of dry air.

This is problem 6-9 from El-Wakil’s Powerplant Technology book -- consider for simplicity an ideal Rankine cycle with turbine inlet and exit steam at 2500 psia and 1000°F, and 1 psia, respectively, and no feedwater heating. The steam mass flow rate is 2x10⁶ lb_m/h. The plant has two-pass surface condenser with 45-ft-long 7/8-in 18-BWG-type 304 stainless steel tubes. Cooling water enters the tubes at 70°F and 7 ft/s. With no flows into the condenser other than turbine steam, find (a) the plant power, in megawatts, and efficiency and (b) the total number of tubes if the condenser terminal temperature difference is 8°F.

This is problem 6-6 from El-Wakil’s Powerplant Technology book -- consider a powerplant operating on an ideal Rankine cycle without feedwater heating. Steam enters the turbine saturated at 1000°F at the rate 5x10⁶ lb_m/h. The turbine exhausts to a surface condenser area of 402,467 ft² and cooling water inlet temperature of 60°F. Calculate (a) the plant net power, in megawatts, (b) the plant efficiency, in percent, (c) the cooling water exit temperature, in degrees Fahrenheit, and (d) the water flow rate, in pound mass per hour and cubic feet per minute.

Please derive the full expression of the rotation matrices R123(φ, θ, ψ) and R321(ψ, θ, φ).

Derive the expressions for maximum rate of climb, (?? ?? ? )?????? and the velocity at maximum rate of climb, ??(?? /C )?????? for propeller-driven and jet-propelled A/C.

A Carnot-cycle refrigerator rejects heat at the pressure of 1000 kPa during which the working fluid R -134a changes from saturated vapor to saturated liquid. The heat is added to the cycle at the pressure of 320 kPa. Show the cycle in a T-s diagram and determine the coefficient of performance of the cycle using a) the first law of thermodynamics b) the Carnot cycle efficiency equation and c) the T-s diagram.

A spherical shell of wood with thermal conductivity of 0.13 W/m.K and an inner and outer radius of 10 cm and 20 cm respectively contains a mixture of water and water vapor(100 C) inside the shell which is undergoing a phase change at atmospheric pressure. The shell is suspended in a large room with an ambient air temperature of 25 C Determine the temperature on the outer surface of the spherical shell and rate of heat loss from the fluid undergoing phase change. The thermal conductivity of air is 0.024 W/m.K Assume negligible flow of air inside the room.

The following system is a small power generating plant which contains a boiler, a superheater, a turbine and a condenser. Describe each part of the system with reference to the equations required in terms of heat transfer and work transfer. The feed water flows at 1 tonne/hr at 50°C. The output pressure is 6 bar with a dryness fraction is 0.9 and the efficiency of the boiler is 75%. The calorific value of the fuel is 38MJ/kg. Determine the fuel flow rate.

The superheater adds 300°C of super heat, determine the energy input to the superheater assuming no heat loss.

The turbine is 70% efficient and the output steam is at 0.2 bar and 0.8 dryness fraction. Determine the output power of the turbine.

Case Study

In Francisco Automotive Manufacturing Plant, a large number of engineering activities are carried out in a wide range of areas. These activities include design, production of parts, assembly, testing, and quality assurance.

Many of the manufacturing processes in the plant are performed using automated technologies and equipment. People also perform some of the manufacturing tasks and the plant employs over 400 workers. The decision on whether people or machines will be used for a particular task is dependent on many factors, including costs, time, quality and worker health and safety.

The plant considered here produces a many parts for vehicles and assembles them. Among the parts produced are engine materials and parts, pumps, fans, some exterior parts, and electronics components. The plant normally operates three shifts per day and has production lines including machining equipment, conveyers and overhead cranes, punch presses, and paint-spray booths. The plant utilizes electricity and natural gas extensively.

A number of workers at the plant have over the last six months been subject to several different health problems. The following information has been received by the head engineer at the plant.

a) In an assembly area that was installed recently, workers have to bend to the ground throughout the    day to attach several small parts onto a large and heavy vehicle component. Some workers have          begun to develop lower back pain, likely due to the repetitive bending. The problem has become so      severe for one of the workers that he has been told by his doctor to stay off work for two weeks so his     back can recover. The manufacturing engineers who designed the assembly operation had wanted to    use an automated system, but that option was deemed not to be economic. So they used a manual                   operation, but did not take into account industrial ergonomics, as they had no expertise in that               discipline.

b) An increased incidence of respiratory illnesses has been reported over the last month by workers       operating near the paint-spray booths. Many of the substances used in the booths (paints, solvents,            etc.) are known to be causes of the observed respiratory illnesses. But the workers are not supposed to come into contact with any of the substances because the paint-spray booths are designed to        ensure that all materials exit the plant through a high capacity ventilation system and that no materials can leak back into the plant. No tests had been carried out on the ventilation system, or on            the air quality around the paint spray booths, so it is uncertain whether or not there have been any                      leaks into the plant from the paint-spray booths.

c) In an area of the plant where metal cutting occurs and workers use protective eyewear, workers have reported minor eye injuries. The area in question is one where it is common knowledge that the workers do not routinely use the protective eyewear. It is often observed to be hanging on nearby hooks or to be loosely hanging around the necks of workers. Workers complain that they find the protective eyewear uncomfortable and do not think it is needed or important. The plant manager knows of this behaviour but overlooks it, since enforcing the use of the protective eyewear seems may make the workers unhappy and, consequently, less productive. That, he feels, could render the plant non-competitive.

Questions:

1) Which of the unsafe conditions and acts identified in part b are (a) of a technical nature,

            or (b) related to human behaviour or management?

2) What are some steps can be taken to rectify the health problems observed?