An air-conditioned room is to be maintained at 18oC, percentage saturation 40%. The fabric heat gains are 3000 W and there are a maximum of 20 people in the room at any time. Neglecting all other heat gains or losses calculate the required volume flow rate of air to be supplied to the room and its percentage saturation when the air supply temperature is 10oC. (Sensible heat gains per person = 100 W; latent heat gains per person = 30W; barometric pressure = 1.01325 bar)

Tech A says that in some vehicles, airbag deployment can be based on the speed of the impact and the weight of the seat occupant. Tech B says that the SRS seat belt pretensioners tighten the seat belt when you connect the seat belt. Who is correct?

A smooth steel sphere of specific gravity (SG) 7.82 and diameter25.4mmis dropped into a large tank of oil(r= 820kg/m3,μ=0.9Pa.s). Calculate the terminal velocity of the sphere noting that drag coefficient is a function of Reynolds number as shown in Figure 1

.Hint you will need to perform an iterative calculation.[Answer 1.2m/s without buoyancy or 1.1 m/s with buoyancy

]

There are 10 m3/s of moist air at 22C and relative humidity of 50% that enter a
heating element until its temperature becomes 35C. Determine the amount of
heat required and the final %Rh of the air.

A 32 inch diameter pump handling 22000 GPM flow of water coming from an atmospheric tank storage is running at 1170 rpm. The water temperature can be taken at 25 C. The suction line is 20 meter long at 6 inch diameter. The pump suction is 0.4 meter above ground level. The tank storage is elevated on a 1 meter high platform. Assume friction factor of 0.02. Specific Gravity of water at 25 C is 0.9967. NPSH required is 34 ft. Determine: A) NPSHA in terms of feet, B) Will cavitation occur, yes or no? C) BHP D) the specific speed., E and G) if new speed is 900 rpm with same impeller diameter, determine the new flowrate in GPM and new head in ft?

In a slab of material 0.25 m thick and having a thermal conductivity of 45 W/mK, the
temperature °C at x under steady state is given by T = 100 + 200x – 400x2 when x is measured
from one face in m. Determine the heat flow at x = 0, x = 0.125 and x = 0.25 m and also the
temperatures and temperature gradients at these planes. If the difference in heat flow at these
sections is due to the heat generation, determine the heat generation rate per unit volume.

With the aid of a graph, explain the term Diesel Dilemma, stating why it is not possible to have high efficiency and low emissions.

Automated inspection can be integrated with the manufacturing process to accomplish some action. What are these possible actions?

12. Identify at least one problem associated with using carburizing environment while sintering the plain carbon steel sprockets.
13. Identify at least one problem associated with using oxidizing environment while sintering plain carbon steel gears?
14. Search literature and identify at least one application of powder metallurgy to manufacture tools using composite materials.
15. Metallic sheets can be manufactured through rolling process using either plate or metallic powder as starting material; identify one drawback and one comparative advantage in each case.

what role does the keyboard play in each of the following examples: rhythmic, harmonic or melodic?

1. Theremin
2. Ondes Martenot
3. Trautonium
4. Hammond Organ
5. Fender Rhodes
6. Mellotron
7. MiniMoog
8. ARP Odyssey
9. KORG MS-20
10. Prophet 5
11. Oberheim
12. PPG-Wave
13. Yamaha DX-7

The following problem description applies also to the next two problems.

A piston-cylinder device contains 2 kg of a saturated liquid mixture at an initial state 1 with p₁= 100 kPa and x₁= 0.8. The water is heated at constant pressure until its final state 2 with volume V₂ = 1.947V₁.

Its initial volume, in m³/kg, is closer to:

2.990

3.836

2.711

4.625

2.345

1.736

2.156

1.294

Its final temperature, in ^oC, is closer to:

268

167

300

142

280

220

188

325

The amount of heat supplied to the steam during the expansion process, in kJ, is closer to:

1702

750

1992

2210

1623

1248

984

1110

Does bauschinger effect play a role in fatigue behaviour of material?