Precision Machining Technology
Precision Machining Technology
3rd Edition
ISBN: 9781337795302
Author: Peter, Hoffman.
Publisher: Cengage Learning,
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Chapter 1.1, Problem 13RQ

__________ uses a high-pressure stream of water containing abrasive particles to cut material.

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Q2: (15 Marks) A water-LiBr vapor absorption system incorporates a heat exchanger as shown in the figure. The temperatures of the evaporator, the absorber, the condenser, and the generator are 10°C, 25°C, 40°C, and 100°C respectively. The strong liquid leaving the pump is heated to 50°C in the heat exchanger. The refrigerant flow rate through the condenser is 0.12 kg/s. Calculate (i) the heat rejected in the absorber, and (ii) the COP of the cycle. Yo 8 XE-V lo 9 Pc 7 condenser 5 Qgen PG 100 Qabs Pe evaporator PRV 6 PA 10 3 generator heat exchanger 2 pump 185 absorber
Q5:(? Design the duct system of the figure below by using the balanced pressure method. The velocity in the duct attached to the AHU must not exceed 5m/s. The pressure loss for each diffuser is equal to 10Pa. 100CFM 100CFM 100CFM ☑ ☑ 40m AHU -16m- 8m- -12m- 57m 250CFM 40m -14m- 26m 36m ☑ 250CFM
A mass of ideal gas in a closed piston-cylinder system expands from 427 °C and 16 bar following the process law, pv1.36 = Constant (p times v to the power of 1.36 equals to a constant). For the gas, initial : final pressure ratio is 4:1 and the initial gas volume is 0.14 m³. The specific heat of the gas at constant pressure, Cp = 0.987 kJ/kg-K and the specific gas constant, R = 0.267 kJ/kg.K. Determine the change in total internal energy in the gas during the expansion. Enter your numerical answer in the answer box below in KILO JOULES (not in Joules) but do not enter the units. (There is no expected number of decimal points or significant figures).

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Precision Machining Technology

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