Which statement linking driving habits and fuel efficiency is true? OA
Aggressive driving, such as speeding and braking abruptly, increases fuel use.
OB. Driving slowly will require more gas per mile.
OC. Tailing behind other drivers will help improve fuel efficiency.
OD
Driving more often will increase a vehicle's fuel efficiency over time.
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The y form of iron is known as: a) ferrite b) cementite c) perlite d) austenite

Compute the pressure drop of 30°c air flowing with a mean velocity of 8 m/s in a circular sheet-metal duct 300 mm in diameter and 15 m long. use a friction factor, f 0.02, and pair = 1.1644 kg/m a. 37.26 pa b. 25.27 pa n c. 29.34 pa d. 30.52 pa

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)