In a heat treatment process, a 2-kg steel part that is initially at 1000 k, is quenched in a tank containing oil, initially at 300 k. there is negligible heat transfer between the contents of the tank and their surroundings. the steel part = 0.50 kj (kgk), = 8080 kg m3 ⁄ ⁄ ] and oil [cc = 1.95 kj (kgk), = 890 kg m3 ⁄ ⁄ ] can be modeled as incompressible substances

Thermal stresses are developed in a metal when its a) initial temperature is changed b) final temperature is changed c) density is changed d) thermal deformation is prevented e) expansion is prevented f) contraction is prevented

Journeyman training is usually related (clo2) a)-to specific tasks b)-to cost analysis of maintenance task c)-to control process to ensure quality d)-to installation of machinery

Asolid cylinder is concentric with a straight pipe. the cylinder is 0.5 m long and has an outside diameter of 8 cm. the pipe has an inside diameter of 8.5 cm. the annulus between the cylinder ad the pipe contains stationary oil. the oil has a specific gravity of 0.92 and a kinematic viscosity of 5.57 x 10-4 m2/s. most nearly, what is the force needed to move the cylinder along the pipe at a constant velocity of 1 m/s?