Engineering, 31.08.2019 01:00 hermine40
Abrass ingot weighing 200lbm and having a surface area of 3.5 sq ft is at a uniform temperature of 100 f. itâs placed in a furnace where itâs exposed to an atmosphere at 2200 f. the surface film coefficient between the ingot and the furnace atmosphere is estimated to be 50 btu/hr-sq ft f. assume that the ingot has a negligible internal thermal resistance. for brass â=550 lbm/cu ft and the specific heat c=0.100 btu/lbm-f. whatâs the time in minutes it will take for the ingot to reach a temperature of 1500f?
Answers: 2
Engineering, 04.07.2019 18:10
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
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Engineering, 04.07.2019 18:10
Ajournal bearing has a journal diameter of 3.250 in with a unilateral tolerance of 20.003 in. the bushing bore has a diameter of 3.256 in and a unilateral tolerance of 0.004 in. the bushing is 2.8 in long and supports a 700-lbf load. the journal speed is 900 rev/min. find the minimum oil film thickness and the maximum film pressure for both sae 20 and sae 20w-30 lubricants, for the tightest assembly if the operating film temperature is 160°f. a computer code is appropriate for solving this problem.
Answers: 3
Engineering, 04.07.2019 18:10
Hydraulic fluid with a sg. of 0.78 is flowing through a 1.5 in. i.d. pipe at 58 gal/min. the fluid has an absolute viscosity of 11.8 x 105 lbf-sec/ft2. is the flow laminar, turbulent or within the critical range? give both a numerical reynolds number and a term answer.
Answers: 3
Engineering, 04.07.2019 18:10
Ifa component is made of two or more materials with different modulus of elasticity (e), it is called a composite member and we calculate the factor·n". mention the formula for calculating n". also, ifn> 1, explain what will happen to the 1. transformed.gi) ifn 1, what will happen to the material when transformed material when
Answers: 1
Abrass ingot weighing 200lbm and having a surface area of 3.5 sq ft is at a uniform temperature of 1...
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