Humid air at given : dry-bulb temperature, wet-bulb temperature and total pressure enters a drier at a given molar flow rate. Using psychometric chart to estimate :relative humidity, absolute humidity, dew point temperature and humid volume of air 

A- volumetric flow rate entering drier?
B-mass flow rate BDA entering drier?
C-Ha and Hm if more mass flow rate of water is added during passing through drier?
D-molar composition air leaving drier?
E-percentage humidity (Hp) air entering drier?

The cosine waves amplitude is 25% of the wave length. How many percent larger is this area as compared to being totally flat (amplitude is 0% of wave length). Base your calculations on the numeric length integral for the waves length.

Air within a piston-cylinder assembly execute an ideal Carnot power cycle within maximum and minimum temperatures of 600 K and 300 k, respectively. The heat added at the high temperature is 250 kJ/kg. The lowest pressure in the cycle is 75 kPa. Assuming the ideal gas model for the air (constant cv, cp, k, with the following properties: kair = 1.4, cv,air = 0.717 J/g.K, Mair = 28.97 g/mol, Universal Gas Constant 8.314 /( . ) _ R = J mol K ),

(a) Sketch the cycle on a p-V diagram;

(b) Determine the thermal efficiency of the cycle;

(c) Determine the specific volume and pressure after the heat rejection process;

(d) Determine the net work per unit mass of the cycle;

(e) Determine the work per unit mass in each of the adiabatic processes.

among the four mechanisms of materials strengthening.Which of these strengthening mechanisms can or can not be used where creep strength is a major cocern? Why?

For the double-pipe heat exchanger of Problem 3.10, calculate the outlet temperatures of the
two streams when the unit is first placed in service.

Q:3.10
A hydrocarbon stream is to be cooled from 200◦F to 130◦F using 10,800 lb/h of water with
a range of 75–125◦F. A double-pipe heat exchanger comprised of 25 ft long carbon steel
hairpins will be used. The inner and outer pipes are 1.5- and 3.5-in. schedule 40, respectively.
The hydrocarbon will flow through the inner pipe and the heat-transfer coefficient for this
stream has been determined: hi = 200 Btu/h · ft2
·
◦F. Fouling factors of 0.001 h · ft2
·
◦F/Btu
for water and 0.002 h · ft2
·
◦F/Btu for the hydrocarbon are specified. How many hairpins will
be required?

A train, A, with a mass of 19,000 kg is travelling at 90 km/h when it strikes a second train, B, which has a mass of 17,000 kg and is moving in the same direction at a speed of 43.2 km/h. If the coefficient of restitution for the collision is 0.87 and all resistances to motion are negligible, then

(i) calculate the speed of the trains A and B immediately after the impact.

(ii) as a result of damage during the collision trains A and B have a constant friction resistance to the motion of 14,500 N. Calculate the distance that the train B will move before coming to rest.

Using an iron-carbon phase diagram, calculate the expected phases and volume fraction of each phase at room temperature for the a) the 0.20 wt.% C steel and b) the 0.45 wt.% C steel

A simple air cooled system is used for an aeroplane to take a load of 10 tons.
Atmospheric temperature and pressure is 25°C and 0.9 atm respectively. Due to
ramming the pressure of air is increased from 0.9 atm, to 1 atm. The pressure of air
leaving the main compressor is 3.5 atm and its 50% heat is removed in the air-cooled
heat exchanger and then it is passed through a evaporator for future cooling. The
temperature of air is reduced by 10°C in the evaporator. Lastly the air is passed
through cooling turbine and is supplied to the cooling cabin where the pressure is 1.03
atm. Assuming isentropic efficiency of the compressor and turbine are 75% and 70%,
find
a) Power required to take the load in the cooling cabin
b) COP of the system.
The temperature of air leaving the cabin should not exceed 25°C. (Solution)
7. True and False
1. COP of a Carnot system depends only on the refrigeration and heat rejection
temperatures only. (Answer)
2. As heat transfer from a gas can be done isothermally, Carnot cycle is easy to
implement practically. (Answer)
3. For a fixed heat rejection and refrigeration temperature, the COP of a brayton
cycle is lower than COP of reverse Carnot cycle. (Answer)
4. Efficiency of dense air systems are low as operating pressures are higher
(Answer)
5. DART is the temperature of the air at the exit of the cooling turbine. (Answer)
6. A Simple system is adequate to handle high Mach numbers. (Answer)

a rectangular slab of 2024-T6 alluminium alloy is to be machined by a cutting tool of a rake angle of 6.5 degrees. the friction coefficiet between the tool and the slabmaterial was found to be 0.32 . if the shear yield stress of the alluminium alloy is 210 MN/m^2 , calculate the force in the direction of the tool feed (Fx) for a depth cut (t) of 0.8 mm and a unit tool width of 1mm.

Question: Important parameters for this assignment Table 1: Default parameters for kinematics and kinetics ...

Important parameters for this assignment

Table 1: Default parameters for kinematics and kinetics analysis of cricket bowling

Velocity of bowler’s run = 8 m/s

Length of arm = 0.8 m

Height of ball at release = 2.4 m

Mass moment of inertia of the arm, I = 0.64 kgm^2

Length of a cricket pitch = 20 m

Coefficient of restitution between ball and pitch = 0.8

Question 1. By considering work and energy conservation (not covered in this unit), we arrive at the following equation that relates torque (T [Nm]), angular displacement (? [rad]), the mass moment of inertia of the arm (I [kg m2]), and angular velocity (? [rad/s]): ???? = 1/2* ????^2 Use the above expression to calculate the linear tangential velocity of the ball, v [m/s] when it is released by the bowler after a rotation of 225°, with an estimated torque applied to the shoulder of 100 Nm (Figure 1). (1 mark)

Question2. The linear tangential velocity of the ball, v you have calculated in Question 1 is relative to the bowler. Furthermore, it is directed an angle, ? of 5° below the horizontal (see Figure 3). Given that the bowler was running at a horizontal velocity (vbowler) of 8 m/s during the release, use your knowledge of vector arithmetic to calculate:

(a) The absolute velocity vector of the ball after release.

(b) The magnitude of the ball’s absolute velocity after release.

After being released, the ball will follow a defined trajectory as it falls to the ground under the influence of gravity.

Question 3 Use your knowledge of particle kinematics to determine:

(a) The velocity vector of the ball just before it hits the ground.

(b) The magnitude of the ball’s velocity just before it hits the ground.

The ball will bounce after it hits the ground. We can simulate the trajectory of this bounce using the principle of conservation of linear momentum and the coefficient of restitution. Unlike the 1D rectilinear motion example covered in lectures however, we are dealing with a 2D coordinate system here. Thus, we will need to perform our analysis in each of the x and y-coordinates separately to determine the velocity of the ball after impact with the ground.

Question 4. By considering conservation of momentum and the coefficient of restitution, calculate: (a) The velocity vector of the ball after impact with the ground.

(b) The magnitude of the ball’s velocity after impact with the ground.

Hint: The velocity of the ground remains 0 [m/s] before and after impact, and you may assume that the impact dominantly affects the vertical speed of the ball.

In an oil fired boiler the fuel had an analysis by mass: carbon 84%, Hydrogen 11%, Sulphur 3%, and Oxygen 2%, remained incombustible. The analysis of dry gas flue gas by volume gave: combined CO₂ 9.7%, CO 0.5%, O₂ 2.95%, and N₂ 86.85%, there being no SO₃. Calculate per kg of fuel: 1- Mass of air supplied. 2- Percentage excess air supplied. 3- Mass of flue gas formed. 4- Mass of water vapor formed.

what is the effect of heat treatment process on aircraft turbine ..with explaining?

solid work any project