A200 mm long pipe slopes down at 1 in 100 and tapers from 0.25m diameter to 0.15 diameter at the lower end. if the pipe carries 100 litres of oil of specific gravity 0.85 find the pressure at the lower end. the upper end gauge reads 50 kpa.

The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false

Which of the following components of a pid controlled accumulates the error over time and responds to system error after the error has been accumulated? a)- proportional b)- derivative c)- integral d)- on/off.

Air inially occupying a volume of 1 m2 at 100 kpa, 27 c undergoes three internally reversible processes in series. process 1-2 compression to 500 kpa during which pv constant process 2-3 adiabatic expanslon to 100 kpa process 3-1: constant-pressure expansion to 100 kpa (a) calculate the change of entropy for each of the three processes. (b) calculate the heat and work involved in each process. (c) is this cycle a power cycle or refrigeration cycle?