19. The total load of an industrial plant is 4000 kW, and the load operates at a power factor of 0.85 lag. If an 800-hp synchronous motor with 93.5% rated efficiency and operating at unity power factor is added,
what is the new value of power factor, in percent?
A. 89.5%
B. 88.2%
C. 76.0%
D. 98.6%

Abrake has a normal braking torque of 2.8 kip in and heat-dissipating cast-iron surfaces whose mass is 40 lbm. suppose a load is brought to rest in 8.0 s from an initial angular speed of 1600 rev/min using the normal braking torque; estimate the temperature rise of the heat dissipating surfaces.

Apressure vessel with an r/t 20 cannot be treated as thin walled vessel. a)-trune b)- false

Aseries piping system conveys methyl alcohol. the system consists of 70 m of 1- nominal pipe follow by 50 m of 2-nominal pipe, both schedule 40 commercial steel. the 1-nominal pipe contains 3 90° elbows (regular) anda fully open gate valve, all threaded. the pressure drop through the system is 150 kpa. determine the volume flow rate through the system that is horizontally laid.