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A sling psychrometery in a laboratory test recorded the following readings. Dry bulb temperature 35°C
Wet bulb temperature = 25°C Calculate the following
(i) Specific humidity, (ii) Relative humidity
(iii) Vapour density in air dew point depression.
(iv) Dew point temperature and (v) Enthalpy of mixture per kg of dry air
Take atmospheric pressure = 1.0132 bar
Specific volume 7.40 m3 of air per minute at 31˚C DBT and 18.5˚C WBT is passed over the cooling
coil whose surface temperature is 4.4˚C. The coil cooling capacity is 3.56 tons of refrigeration
under the given condition of air. Determine DBT and WBT of the air leaving the cooling coil.
Preparing a report and a proposal on matching of properties and engineering material selection, analyse behaviour of materials, predict various degradation, and finally propose techniques and describe steps how different techniques can be used to contrast and compare theoretical properties by real time values.
2.1 Propose 2 to 5 suitable engineering materials (metals or non-metals) can be used to fabricate following components. You may survey more relevant resource online.
a. Roller conveyer
b. Conveyer leg mountings with the floor
c. Heating oven
d. Dipping tank
e. Safety measures for workers
Mould bases (Figure 5) are at the room temperature of 28°C before entering to the heating oven and mould bases temperature change following the graph shown in Figure 6. Calculate the expansion of the mould base width at different temperatures and plot with the time measured in minutes. If the linear thermal expansion coefficient of mould base that is made out of Aluminium is 24 x 10−6 m/mk and linear thermal expansion coefficient of the rollers is 15 x 10−6 m/mk, determine the minimum gap between mould base and the roll
Q: An overhang beam ABCD is simply supported at A and C. The beam carries a uniformly distributed load of 4kNm-1 over the entire span, a concentrated load of 40kN at B and a concentrated load of 20kN at D, as shown in the Figure. The reaction forces at A and C are 22 kN and 86 kN respectively. The bending moment equation for section AB, is ….
a crank and slotted lever quick return motion mechanism, the distance between the fixed centers is 370 mm and the length of the driving crank is 150 mm.Find the inclination of the slotted bar with the vertical in the extreme position and the time ratio of cutting stroke to the return stroke. If the length of the slotted bar is 450 mm,crank angle of 45°from inner dead centre position.
Horizontal pipe of 250 mm diameter and 60mm long is connected to water tank at one end and discharges freely to atmosphere through other end and the height of water tank is 4.5 m above the centre of the pipe. Calculate the rate of flow of water consider friction is 0.008
A turbine with one extraction for regenerative feed water heating receives steam with
an enthalpy of 3373 kJ/kg and discharges it with an exhaust enthalpy of 2326 kJ/kg.
The ideal regenerative feed water heater receives 11,338 kg/h of extracted steam at
345kPa (whose h=2745kJ/kg). The feedwater (condensate from the condenser)
enters the heater with an enthalpy of 140kJ/kg and departs saturated at 345kPa
(hf=582kJ/kg). Calculate the turbine output in kW.
A Design of Single Reduction Spur Gearbox An input shaft connected to the motor rotates at 1200 rpm, while the output speed must be 570 rpm. The contact force between the gears is transmitted through the pressure angle of 20°. The radial force is 321,90 kN. The material for both gear and pinion is 817M40. 1.1 Briefly state the problem. (3) 1.2 State the design specification considering the following design factors: 1. Functionality, 2. Size, 3. Safety.
In a crank and slotted lever quick return motion mechanism, the ratio of maximum
velocity at return stroke to the maximum velocity at cutting stroke is 2. If 25cm is the
stroke length, find (a) slotted lever length, (b) the ratio of time of cutting to return
strokes, (c) If the crank rotates at 30rpm, what is the maximum cutting velocity per
sec.
#340153 on Dec 2023