He engine in Problem 3.8 produces 57kW of brake power at 2000 RPM. Calculate:

(a) Torque. [N-M]
(b) Mechanical efficiency. [%]
(c) Break mean effective pressure. [kPa]
(d) Break specific fuel consumption. [gm/kW-hr]

The y form of iron is known as: a) ferrite b) cementite c) perlite d) austenite

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.

Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -26°c with a volumetric flow rate of 0.18 m3/s. refrigerant exits at 9 bar, 70°c. changes in kinetic and potential energy from inlet to exit can be ignored. determine the volumetric flow rate at the exit, in m3/s, and the compressor power, in kw.