A1-2 s-t heat exchanger is used to cool oil in the tubes from 91°c to 51°c using cooling water at 30°c. in the design case, the water exits at 40°c. the resistances on the water and oil sides are equal. what are the new cooling water outlet temperature and the required cooling water flowrate if the oil throughput must be increased by 25% but the outlet temperature must be maintained at 51°c?

Inadequate stores control is not an obstacle to effective work order system. (clo4) a)-true b)-false

Inspection for bearing condition will include: (clo4) a)-color b)-smell c)-size d)-none of the above

Tom is having a problem with his washing machine. he notices that the machine vibrates violently at a frequency of 1500 rpm due to an unknown rotating unbalance. the machine is mounted on 4 springs each having a stiffness of 10 kn/m. tom wishes to add an undamped vibration absorber attached by a spring under the machine the machine working frequency ranges between 800 rpm to 2000 rpm and its total mass while loaded is assumed to be 80 kg a) what should be the mass of the absorber added to the machine so that the natural frequency falls outside the working range? b) after a first trial of an absorber using a mass of 35 kg, the amplitude of the oscillation was found to be 10 cm. what is the value of the rotating unbalance? c) using me-3.5 kg.m, find the optimal absorber (by minimizing its mass). what would be the amplitude of the oscillation of the absorber?