Two technicians are describing the replacement of an upper control arm on an SUV (sport utility
vehicle) that has torsion bars attached to the
lower control arms. Technician A says the vehicle
should be supported by stands placed under the
frame. Technician B says torsion bars should be
unloaded before any attempt is made to remove
the upper control arm. Who is right?
Technician A
Technician B
Both A and B
Neither A or B

Amixture of slurry and mud is to be pumped through a horizontal pipe of diameter 500 mm. the fluid behaves as a bingham plastic with a yield stress of 30 pa and viscosity 0.04 pa.s. describe the effects of the shear stress through a transverse section of the pipe by plotting the variation in shear stress and velocity profile: (i) just before the slurry starts to move (ii) as the slurry flows when the pressure gradient is double that in part (i)