PEOPRO 1. A cooler is required to cool 0 5 kg's of oil from 50°C to 30°C with a cooling
water inlet temperature of 10% and a mass flow rate of 0.375 kg's Calculate the
heat exchanger surface area required if the cooler is connected
a. Using a counter flow arrangement
6. Using a parallel flow arrangement
Use the Overall heat transfer coefficient 70 W/mK
Specific heat capacity of oil - 1400 JkEK
Specific heat capacity of water 4200 kgk or J/kg °C

Line joining liquid phase with liquid and solid phase mixture is known as: a) liquidus b) solidus c) tie line d) none of the mentioned

Two flowing streams of argon gas are adiabatically mixed to form a single flow/stream. one stream is 1.5 kg/s at 400 kpa and 200 c while the second stream is 2kg/s at 500 kpa and 100 ? . it is stated that the exit state of the mixed single flow of argon gas is 150 c and 300 kpa. assuming there is no work output or input during the mixing process, does this process violate either the first or the second law or both? explain and state all your assumptions.

Thermal stresses are developed in a metal when its a) initial temperature is changed b) final temperature is changed c) density is changed d) thermal deformation is prevented e) expansion is prevented f) contraction is prevented