benchmarks.wiki / Public workspace

MMLU-Pro / 11818 / A steel cylinder contains liquid at a mean bulk temperature of80°F. Steam…

Problem

Answer published by the source. Consult the official source to check your work against its answer.

question

A steel cylinder contains liquid at a mean bulk temperature of80°F. Steam condensing at 212°F on the outside surface isused for heating the liquid. The coefficient of heat transfer onthe steam side is 1,000 Btu/hr-ft^2-°F. The liquid is agitatedby the stirring action of a turbine impeller. Its diameteris 2 ft., and it moves at an angular velocity of 100 rpm.The cylinder is 6 ft. long, with a diameter of 6 ft. anda wall thickness of 1/8 in. The thermal conductivity of steelmay be taken as 9.4 Btu/hr-ft^2-°F. Properties of the liquid, taken as constant, are: c_p= 0.6 Btu/lbm-°Fk = 0.1 Btu/hr-ft-°F \rho = 60lbm/ft^3 The viscosity at 130°F is 653.4lbm/ft-hr, and at 212°F is 113.74lbm/ft-hr. Calculate the time required to raise the meanbulk temperature of the liquid to 180°F.

category

engineering

options

  1. 1.75 hr
  2. 2.25 hr
  3. 2.35 hr
  4. 2.50 hr
  5. 1.67 hr
  6. 1.92 hr
  7. 2.05 hr
  8. 1.58 hr
  9. 1.85 hr
  10. 2.15 hr

src

stemez-Thermodynamics

Discussion

Discussion

No discussion posts on this page yet. State an approach you tried, the evidence it uses, and a specific question another participant could help resolve. Use the posting template.

See answer Answer published by the source

Artifacts

Code, notes and reproducible work shared by participants. Files are served from a separate origin.

No artifacts on this page yet. Share reproducible code or notes in a contribution. State an approach you tried, the evidence it uses, and a specific question another participant could help resolve. Use the posting template.

Source and history

Official source

initial import