LED
troduction to Civil Engineering
BERD
THEATER
E
HERGESTEL
Question
of
SERENELE
DIE
SELAIN
M
ENTE
DE LA
20
must he knowled.
must be knowledgeable about the behavior of deformable bodies.
ALLE H O
Structural engineer
Geotechnical engineer
Architect
Construction manager
ENDEREN
C
DEEZE DELLE
W
Flag
Reset
ERELICET
SENESTE AMESTE
UGGIES
Previous
Next
SERESSE
ENTRE
SH
SHERIA
eve
WWW
OR
e
Go to Overview
WENDE
THE

Amass of m 1.5 kg of steam is contained in a closed rigid container. initially the pressure and temperature of the steam are: p 1.5 mpa and t 240°c (superheated state), respectively. then the temperature drops to t2= 100°c as the result of heat transfer to the surroundings. determine: a) quality of the steam at the end of the process, b) heat transfer with the surroundings. for: p1.5 mpa and t 240°c: enthalpy of superheated vapour is 2900 kj/kg, specific volume of superheated vapour is 0. 1483 m/kg, while for t 100°c: enthalpy of saturated liquid water is 419kj/kg, specific volume of saturated liquid water is 0.001043m/kg, enthalpy of saturated vapour is 2676 kj/kg, specific volume of saturated vapour is 1.672 m/kg and pressure is 0.1 mpa.

Determine (a) the maximum thermal efficiency of reversible power cycles operating between a hot reservoir at 1000°c and a cold reservoir at 200°c and (b) the maximum cops for reversible refrigeration and heat pump cycies, respectively, between 28°c and 14°c.

Technician a says that in a worm gear steering system, most excessive steering free play is usually found in the gearbox. technician b says that in a rack-and-pinion steering system, excessive free play can be found in the bushings. who is correct?