Which of the following persons is not exempt from the licensing provisions of the Professional Engineers Act? A) An employee of a communications company under the jurisdiction of the Public Utilities Commission when prepáring plans for communication lines.
B) A private citizen who designs his own one-story wood frame residence, which complies with Title 24.
C) A licensed contractor when designing an electrical or mechanical system that he or she is legally contracted to install.
D) A licensed contractor designing complete commercial buildings that she or he has contracted to construct.

Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.

When at a point two solid phase changes to one solid phase on cooling then it is known as a) eutectoid point b) eutectic point c) peritectic point d) peritectoid point

Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.