Tutorial 1 CL 201 Time: 1 Hour Sep 23, 2020 Problem 1: Using conversion factors, convert (a) 860 miles/hr to m/s (b) 721 kg/m to lb/ft (c) 6.37103 KJ/min to hp. Problem 2: A waste treatment pond is 60 m long and 10 m wide, and has an average depth of 2 m. The density of the waste is 85.3 lbm/ft. Calculate the weight of the pond contents in lbf, using single dimensional equation for your calculation. Problem 3: Two thermocouples (temperature measuring devices) are tested by inserting their probes in boiling water, recording the readings, removing and drying the probes, and then doing it again. The results of five measurements are as follows: T (C) Thermocouple A 72.4 T (C) - Thermocouple B 97.3 73.1 72.6 72.8 73.0 101.4 98.7 103.1 100.4 (a) For each set of temperature readings, calculate the sample mean, the range, and the sample standard deviation. (b) Which thermocouple readings exhibit the higher degree of scatter? Which thermocouple is more accurate? Problem 4: A hygrometer, which measures the amount of moisture in a gas stream, is to be calibrated using the apparatus shown here. Steam and dry air are fed at known flow rates and mixed to form a gas stream with known water content, and the hygrometer reading is recorded; the flow rate of either the water or the air is changed to produce a stream with different water content and the new reading is recorded, and so on. The following data are taken: Air Dryer Rotameters Water Mass Fraction of water, y Hygrometer reading, R 0.011 5 0.044 20 0.083 40 Hygrometer 0.126 60 0.170 80 Evaporator Steam (a) Draw a calibration curve and determine an equation for y(R). (b) Suppose a sample of a stack gas is inserted in the sample chamber of the hygrometer and a reading of R = 50 is obtained. If the mass flow rate of the stack gas is 1000 kg/h, what is the mass flow rate of the water vapour in the gas?