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What is the work done for 1kg of air? If it is expanded isentropically. What is the pressure of the air leaving the turbine?
The downstream pressure (6-in. pipe) is 40 psi when the flow of water is 3.92 ft^3/s. What horsepower is delivered by the pump to the flow?
What is the ratio of the dynamic viscosity of air to that of water at standard pressure and temperature of 20°C? What is the ratio of kinematic viscosity of air to that of water for the same co
What horsepower must be supplied to a pump that operates at an efficiency of 75% to the flow if water (T=25°C) is pumped through the 25-cm wrought iron steel pipe.
The entrance and exit pipes are identical, D1=D2=60 mm, and both carry 0.08m^3/second. Determine the scale reading W. This is application of the momentum equation.
Find the flow rate at which water is being discharged from the pipe. Neglect minor losses but assume resistance coefficient ƒ=0.0162.
If the discharge from the turbine is 250 cubic feet per second, what power output may be expected from the turbine?
The depth of cut is set to 0.025in and the power feed is set to 0.012in/rev. Calculate the material removal rate and the estimated horsepower requirment. Estimate the tool force.
The inlet area of the turbine is 125 cm^2. Determine (a) the mass flow rate of the steam, and (b) the power output (c) the exit area.
Refrigerant-134a is gaining heat at a rate of 4 kw/s as it passes trough the diffuser. Determine the mass flow rate of the refrigerant.
Initially the nitrogen is at 110kPa and 25 celcius and then it is compressed slowly in a polytropic process during which PV^1.2=constant until the volume is reduced by one-half. Determine the work d
Determine the thermal efficiency of a heat engine that receives 660kJ of heat from a source at 217 Celcius and produces 280 kJ of net work while rejecting the waste heat to a sink at 27 Celcius.
Determine the wall thickness of the hollow square rod for which the rods have the same cross-sectional area. (b) Using E = 15 x 10^6 psi, determine the critical buckling load of each rod.
Superheated water vapor enters a well-insulated throttling valve at p1 = 1 atm and t1 = 600°F. Determine the entropy production in the valve, in Btu/lb·°R.
What should be the sound pressure levels in dB of low frequency speaker at 50Hz and of medium frequency speaker at 1000Hz respectively? What is the combined sound pressure level of all three speaker
An insulated rigid tank is divided into two chambers by a membrane. Determine the total entropy production (Btu/R).
Superheated vapor enters the turbine at 480°C and 100 bar and exits at 0.06 bar. The turbine has an isentropic efficiency of 80%. Determine the actual turbine work, in kJ/kg.
If the house is losing heat at a rate of 20 kJ/s, determine the minimum rate of heat supply to the heat engine required to keep the house at 22C.
Determine the final quality of the R-134a in the container and the total heat transfer to satisfy the process to be isothermal.
The inlet area of the turbine is 50 cm2. If the power output of the turbine is 200 kW, determine the exit temperature of the argon.
The refrigerant is now heated until its temperature rises to 60C. Calculate the work done during this process and the amount of heat transfer.
Take Poissons ratio to be .291 and Young's modulus to be 30.7 x 10^6 psi. What are the dimensions of the elastically deformed iron? What is the volume change due to the applied stress?
When the gate is closed and chute is full what is the Max pressure at bottom of gate? What is the total horizontal force on gate? What is the moment about the bottom of the gate? Density is 0.1 lbs/
If a fraction of steam is removed from the turbine at 2000kPa, passed through a closed water heater followed by a trap and then returned to the condenser to form a regeneration cycle.
Calculate: The temperature of the steam entering the turbine. The work input by the pump. The heat added in the boiler. The net work of the cycle. The thermal efficiency.