Technician a says that carbon monoxide (co) and hydrocarbon (hc) levels should increase if the air injection reactor (air) hoses are pinched off. technician b says that a defective drive belt may cause air system problems. who is correct?

a. technician a
b. both technicians a and b
c. neither technician a nor b
d. technician b

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.

Aflywheel accelerates for 5 seconds at 2 rad/s2 from a speed of 20 rpm. determine the total number of revolutions of the flywheel during the period of its acceleration. a.5.65 b.8.43 c. 723 d.6.86

Burgers vector is generally parallel to the dislocation line. a)-true b)-false