Question 8. A binary-vapour eycle operates on mercury and steam. Saturated mercury vapour at 4.5 bar is supplied to the mercury turbine, from which it exhaust at 0.04 bar. The mereury condenser generates saturated steam at 15 bar which is expanded in a steam turbine to 0.04 bar. (i) Find the overall efficiency of the ceycle. (ii) If 50000 kg/h of steam flows through the steam turbine, what is the flow through the mercury turbine ? (ii) Assuming that all processes are reversible, what is the useful work done in the binary vapour eyele for the specified steam flow ? (iv) If the steam leaving the mereury condenser is superheated to a temperature of 300°C in a super- heater located in the mercury boiler, and if the internal efficiencies of the mercury and steam tur- bines are 0.85 and 0.87 respectively, caleulate the overall efficiency of the eycle. The properties of saturated mercury are given below : p (bar) tCC) (kJ/ kg) (kJ / kg K) (m'/kg) 4.5 450 63.93 355.98 0.1352 0.5397 79.9 x104 0.068 0.04 216.9 29.98 329.85 0.0808 0.6925 76.5 x 10- 5.178 Ans. (i) 52.94%, (i) 59.35 × 10' kg/h, (iii) 28.49 MW, (iv) 46.2%)

Subject - Integrated Design Project Investigative Short Report Feasibility study on automated waste segregation machine project is tasked to you. It is as shown below. Waste Depository Tunnel Image Sensor Waste Flow Actuator Waste Guide Rotational Cam System Waste Bin Figure 1: Automated waste segregation prototype (above) & actual wastebins Page 2 of 4 JANUARY 2022 CONFIDENTIAL 1. Based on first impression on prototypes shown in Figure 1, propose your business strategy. Clearly describe your justifications that are related to SWOT, business-to- business (B2B) or business-to-customer (B2C). (5 marks. CLO1P4Cg4) 2. Based on first impression on prototype shown in Figure 1, propose your marketing strategy. Clearly describe your justifications that are related to at least two (2) of the 7Ps. (5 marks, CLO1P4Cg4) 3. Based on the prototype shown in Figure 1, report on the positive impact to environment and sustainability and also the application of engineering and technology and potential intellectual property (IP) a) Positive impact on environment & sustainability. The 17 sustainable development goals (SDGs) can be used as reference b) The application of engineering and technology and IP (10 marks CLO3P7Cg4)

Coursework 3.3 Write the state-space representation for the following systems: Yilt 7. 421t) К. M2 KI m W fit) bi yait) be -Ma RA 2. 20 + yilt) Ta í It) = Uzlt) Milt=VLE R2 R2

Help please A thin walled cylindrical pressure vessel is subjected to an internal pressure which varies from 750 KPa to 3550 KPa continuously. The diameter of the shell is 1.5 m. Find the required thickness of the cylinder wall based on yield point of 480 MPa, net endurance limit of 205 MPa and a factor of safety of 2.5. A camshaft 19 mm. in diameter is mounted on ball bearings and carries a cam midway from the bearings. The follower, which weighs 2.8 KN, is out of adjustment so that impact is produced when it is contacted by the cam. The height h of fall equals 0.254 mm. The shaft is made of AISI C1045 steel. Determine the maximum bending stress in the shaft.

Consider the following diagram: Internet Modem Wireless AP Switch Wireless AP DO Wireless AP Server 2.1 Using a table, compare 4 types of area networks. Consider the size of the network and the transmission media that is most likely to be found in each type of network. (8) 2.2 Based on the information given in 2.1, which type if network is shown in the Consider the following diagram: Internet Modem Wireless AP Switch Wireless AP DO Wireless AP Server 2.1 Using a table, compare 4 types of area networks. Consider the size of the network and the transmission media that is most likely to be found in each type of network. (8) 2.2 Based on the information given in 2.1, which type if network is shown in the diagram? Motivate your (2) answer. 2.3 This network has wireless access points. Compare three modulation techniques, using sketches, that could be used by these access points to transmit data. Use the bit-stream 10000101111. (6)

P3.5 The sales revenue, food cost of sales, and guests served for a small fast- food carryout division of a restaurant for the past six months are given below. Sales Month Cost of Revenue Guests Served Sales, Food 1 2. 4 $258,200 274,800 285,600 289,400 298,300 304,600 $ 96,200 104,300 110,500 113,100 118,900 123,700 10,200 10,400 10,300 10,100 10,400 10,500 6 For each of the six months calculate average check and average costs of sales food. Using these averages, calculate an index number. Set the in- dex for month 1 at 100 and complete index numbers for the remaining five months. With the index numbers identified, convert sales revenue and cost of sales food from historic to current dollars.

A cylindrical rock sample has a length of 6 cm, a diameter of 4 cm, and a dry weight of 166.4 g. When fully saturated with an oil of density 0.85 g/cm3, the weight of this sample is 176.9 g. Assuming constant temperature, find: i) The porosity of the sample ii) The pore compressibility of the sample, given that 0.2 cm of oil leaves the sample when a pressure of 3200 psig is applied on it iii) The amount of oil that can be extracted from the sample when a pressure of 2000 psig is applied on it