35 N 1.5 m 3m B 30 N 2m 45° 40 20 N
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- 25 MENG201 Mechanical workshop practice(a) A very important component of a system has a mean time between failures of 100 hr and a mean time to repair of 10 hr. Determine the inherent availability of the system. (b) If the equipment in Q7 (c i) above is required to meet an inherent availability requirement of 0.985 and a mean time between failures of 100 hr. Calculate the permissible mean time to repair and if the system as a mean of the time intervals between corrective maintenance actions of 900 hrs and the sum of the mean corrective maintenance time intervals including supply downtime and administrative down time of 10 hrs Determine the operational availability of the systemThe data provided by a company for the year 2020 – 2021 to carry out Break Even Analysis and provide them the results, complete analysis and suggestions. The data is as follows:Building rent 20000 R.O Every month instalments 30000 R.OThe estimated sales are 750000.0 R.OMaterial Cost / unit 15.0 R.OProduction cost / unit 8.0 R. OTransportation & other Costs / unit (Approx) 4.00 R. O Maintenance cost / unit 1.5 R. O Salary of the employees / unit 0.8 R.OMarketing and advertisement cost / unit 0.7 R. OEach unit is sold at price 35.0 R. O Construct the B.E.P chart on a graph sheet and indicate, B.E.P, M.o.S and also indicate the new B.E.P & M.o.S after the improvement measures has been taken (With different colours). Show the calculations for the following parameters separately before and after the measures taken.1. Determine the B.E.P2. Determine the profit 3. Margin of safety.Also write your decisions taken to improve the profits of the company and to reduce the B.E.P.
- 1. If 1 gallon of oil = 1.4 therm, how many gallons have been wasted by heat loss in Feb? (1 therm = 100,000 BTU)_____________________________________________________________________________________2. If $1.30 per therm, how much did you waste from house heat loss in Feb?ANS :1.Qa = 325,400.40 WSF = 02.a. wt' = 6300.00 kwb. x'2 = 94% c. wt = 6720.00 kwd. T2 = 24.1e. T1 = 465f. s2' = 34.10 g. T2' = 24.1 h. Ne' = 93.75i. delta s =1.55 kj/sec KThere are four additive terms in an equation, and their units are given below. Which one is not consistent with this equation? (a) J (b) W/m (c) kg·m2/s2 (d) Pa·m3 (e) N·m
- The specific gravity of natural gas is A. 0.08. B. 1.00. C. 0.42. D. 0.60.The data provided by a water bottling company for the year 2020 to carry out Break Even Analysis and provide them the results, is as follows. The fixed cost of the year is 9000.0 R.O The estimated sales are 2200000 units The cost of water treatment / unit 12 baize The cost of bottling / unit 08 baize The cost of labelling / unit 08 baize The cost packing / unit 10 baize The cost of labour and maintenance / unit 20 baize The cost of 1 liter bottle (plastic bottle) 12 baize Each unit is sold at price 95 baize Construct the B.E.P chart on a graph sheet and indicate M.o.S, B.E.P and also indicate the new B.E.P, & M.o.S after the improvement measures has been taken and show all mathematical calculations. 1. Determine the B.E.P 2. Determine the profit 3. Margin of safety. 4. Write your decisions to improve the profits of the company and to reduce the B.E.PMethanol (SG=0.792) is contained in a large tank under a pressure of 350000 Pa absolute. When a valve on the bottom of the tank is opened, the methanol drains freely though a 0.02 m ID tube whose outlet is 7.00 m below the surface of the methanol. The pressure at the outlet of the discharge pipe is 101325 Pa. Some useful constants and conversions: g = 9.8 m/s2 , Pref = 1000 kg/m3 . a. Draw the system. Label points I and 2 (where you will define A= 2-1) and label the variables with values b Write the general form of the energy balance. Cancel out negligible terms, and state the keyword/assumption to justify. Simplify to the resultant energy balance. c.) Assume the diameter of the tank is very big compared to the drain tube velocity, which make the velocity of liquid in the tank equal to zero. Estimate the methanol discharge velocity in the drain tube in m/s. *hint: divide your EB by m to eliminate m and V. Recall, n = pV = pvA and = v/m=1/p
- 29 - Water is drawn from the bottom of a large tank filled with water open to the atmosphere. If the outlet velocity is 7.2 m/s, what could be the height of the water in the tank? a) 2.64m B) 4.38m NS) 3.65 m D) 5.46 m TO) 2.20m 30 - What would be the weight of an object with a mass of 100 kg in a place where the gravitational acceleration is 8 m/s²? a) 42.2 kgf B) 98.1 N NS) 800 N D) 9810 N TO) 196.2 NPls. Answer thank you! A cooling tower has an efficiency of 65%. Water enters the tower at 55°C. The wet bulb temperature of surrounding air is 27°C. What is the temperature of water leaving the tower?Answer- Po=2.551 bar T=279.9K C=204.689m/s A=.07m2 Po =1.90 kg/s3 m=27.16 kg/s