A new Boeing aircraft engine system has 4 turbine engines setup in parallel configuration. The system is designed for two engines to run continuously during flight time while the other two are on active standby. The operational flight time for the aircraft is expected to be 2000 hrs each year. The failure rate À for each engine is 5 x 10-5/hr. Using binomial expansion of (F+R)" find the probability that at least two engines will be running for four years.

A new Boeing aircraft engine system has 4 turbine engines setup in parallel configuration. The system is designed for two engines to run continuously during flight time while the other two are on active standby. The operational flight time for the aircraft is expected to be 2000 hrs each year. The failure rate À for each engine is 5 x 10-5/hr. Using binomial expansion of (F+R)" find the probability that at least two engines will be running for four years.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter5: Analysis Of Convection Heat Transfer

Section: Chapter Questions

Problem 5.12P

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A new Boeing aircraft engine system has 4 turbine engines setup in parallel configuration. The system is designed for two engines to run continuously during flight time while the other two are on active standby. The operational flight time for the aircraft is expected to be 2000 hrs each year. The failure rate λ for each engine is 5 x 10-5 / hr. Using binomial expansion of (F+R)n find the probability that at least two engines will be running for four years.
The same engineer decides to look into rates of cooling for liquids toexperiment with different cooling solutions for servers. She finds thatthe rate of cooling for one liquid can be modelled by the equation:y = 48 × 0.99t(0 ≤ t ≤ 80)where y is the temperature of the liquid in degrees Celsius and t is thetime in minutes.(i) State whether the type of reduction for this model is linear orexponential. Describe how reduction rate differs between linear andexponential functions. (ii) Calculate the temperature when t = 20. [3](iii) Write down the scale factor and use this to find the percentagedecrease in the temperature per minute. (iv) Use the method shown in Subsection 5.2 of Unit 13 to find the timeat which the temperature is 30◦(v) Determine the halving time of the temperature.
A diesel engine produces 500 kW at 3800 rpm while consuming 0.02975 kg/s of fuel. During operation, data shows that its mechanical energy loses 17%, the actual volume of air going into each cylinder is 90% (The volumetric efficiency has a negligible variation) and the actual fuel to air ratio is 0.05. If the ambient temperature at this location is 18 0C and the standard atmospheric condition is 14 0C hotter with pressure of 100 kPa, what are the standard parameters of the engine: a. Brake Power, kW b. Indicated Specific Fuel Consumption, kg/kW-hr c. Mass of air, kg/s d. Indicated Mean Effective Pressure, kPa WRONG ANSWERSSSSSS a. 415 b. 0.2147 c. 0.595 d. 35.31 THESE ARE THE WRONG ANSWERS. SHOW CORRECT ANSWER
1) An electric motor’s torque is a function of the speed at which it rotates. Many brushed AC motors have a linear toque curve as shown below. If the power output of the motor is equal to the torque (T) multiplied by the rotational speed in rad/s (w), what is the maximum power you can get out of the motor if the stall torque (Tstall) is 0.001 Nm and the no load speed (wno load) of 10,500 RPM? Give answer in Watts.
Completely solve and box the final answers. Write legibly 4. A single stage air compressor handles 30 cubic meter per minute of atmospheric pressure, 30°C air and delivers it to a receiver at 3.0 mpa. Its volumetric efficiency is 83.0%, compression efficiency of 83.0% and mechanical efficiency of 80.30%. If it rotates at 300 rpm, what power in kW is required to drive it?
Suppose we got the following data during a test of a 2- stroke engine in which gas is usedas a fuel:Diameter of the piston = 149 mmStroke length = 179 mmClearance volume = 0.88 literrpm of the engine = 302Indicated mean effective pressure = 6.0 barGas consumption = 6.0 m3/hCalorific value of the gas (fuel) = 16990 kJ/m3Make a clear sketch the geometry of this engine using the data and determine thefollowing:i. Indicated power developed by the engine in watt.ii. Air Standard Efficiencyiii. Indicated thermal efficiency of the engine.
Step 2 of the solution is incorrect for the answer.calculations does not add upThe outlet temperature will be: →T2=m˙1×T1+m˙3×T3m˙1+m˙3 =10×372.78+5×120010+5 =3727.8+600015=648.52 K ..................answer
A vertical jet thru a nozzle supports a 150.90N weight. The velocity and diameter of the jet are 17.90m/s and 3.90 cm respectively. Find the distance of load from the nozzle in meters. Group of answer choices 13.79 31.79 17.93 71.39I need an answer for this asap :(
In a chemistry plant, through a horizontal smooth pipeline with a diameter of 0,3 m, a fluid with density and viscosity of 769 kg/m3 and 0,0007 Pa-s, respectively is flowing with a flow rate of 0,009 m3/s. Disregarding the pipe entrance effects and treating flow being steady, uniform and incompressible; a) Find the magnitude of mean velocity (in m/s). (Please use only 3 decimal digits.) b) Find Reynolds number. (Please do not use any decimal digit.) c) Find the magnitude of friction factor. (Please use 4 decimal digits.)
In the design of a jet engine part, the designer has a choice ofspecifying either an aluminium alloy casting or a steel casting. Either materialwill provide equal service, but the aluminium casting will weigh 1.2 kg ascompared with 1.35 kg for the steel casting.The aluminium can be cast for $ 80.00 per kg. and the steel one for$ 35.00 per kg. The cost of machining per unit is $ 150.00 for aluminiumand $ 170.00 for steel. Every kilogram of excess weight is associated witha penalty of $ 1,300 due to increased fuel consumption. Which materialshould be specified and what is the economic advantage of the selection perunit?
1) Affinity laws apply to both pumps and turbines. True or False 2) A pelton wheel is used to produce hydroelectric power. The average radius of the wheel is 1.83 m, and the jet velocity is 100 m/s from a nozzle of exit diameter equal to 10 cm. What is the volume flow rate through the turbine in m3/s? a) 263.02 b) 0.801 c) 78.54 d) 0.785 3) A water pump increases the pressure of the water passing through it (see picture below). The flow is assumed to be incompressible. If the outlet diameter is less than inlet diameter, which of the following about outlet and inlet fluid velocity is correct? a) Vout < Vin b) Vout > Vin c) Vout = Vin d) cannot be determined
Show step by step solution asap I will rate Positively .