Afireclay brick slab [α=5.4x10^-7m^2/s, and k=1w/m.°c] 10cm thick is initially at a uniform temperature of 350°c. suddenly one of its surfaces is subjected to convection with a heat transfer coefficient of 100w/m².°c into an ambient at 40°c. calculate the temperature at a depth 1cm from the surface 2min after start of cooling.

The higher the astm grain size number, the finer the gran is. a)-true b)-false

What are the two (02) benefits, which may result from a successful implementation of preventive maintenance (pm) program in an organization? (clo3)a)- lean manufacturing b)-overlapping responsibilities c)-the planner is not qualified d)-accurate contractor information e)-reduction in equipment redundancies f)-accurate stores information

Vibration monitoring this technique uses the noise or vibration created by mechanical equipment and in seme cases by plant systems to detemine their actual condtion. a)- true b)- false