Thermodynamic Units 3

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  1. Which of these expressions of power is incorrect?
    A.BTU
    B.Tons
    C.Foot-Pound/sec
    D.Watts
    A.BTU

    The correct units is BTU/hr. (BTU is work or energy.)
    (this multiple choice question has been scrambled)
  2. Which expression of power is incorrect?
    A.BTU/hr
    B.Watts
    C.Tons
    D.Foot-Pounds
    D.Foot-Pounds

    The correct units is ft-lb/sec. (ft-lb is work or energy.)
    (this multiple choice question has been scrambled)
  3. Which expression of energy is incorrect?
    A.kilowatt
    B.ft-lb
    C.BTU
    D.Joule
    A.kilowatt

    The correct units is kW-hr. (kW is power)
    (this multiple choice question has been scrambled)
  4. Which expression of energy is incorrect?
    A.BTU
    B.Joule
    C.ft-lb/sec
    D.kilowatt-hour
    C.ft-lb/sec

    The correct units is ft-lb. (ft-lb/sec is power)
    (this multiple choice question has been scrambled)
  5. What is Joule's constant? How is it used in the definition of enthalpy?
    chart?chf=bg,s,00000000&cht=tx&chl=J%3D778.17%20%5Cfrac%7Bft-lbf%7D%7BBTU%7D&chs=260x74

    chart?chf=bg,s,00000000&cht=tx&chl=h%3Du%2B%5Cfrac%7Bpv%7D%7BJ%7D&chs=162x66
  6. What is the conversion between ft-lb/sec and HP?
    550 ft/lb/sec = 1 HP
  7. What is the specific heat of water?
    1 BTU/lbm-F
  8. What is the density of air?
    0.075 lbm/ft3
  9. What units define a Pascal (Pa)?
    1Pa = 1 N/m2
  10. What is the density of water?
    62.4 lbm/ft3
  11. What are the units for gc?
    ft-lbm/lbf-sec2
  12. What is the conversion factor between feet and meters?
    1 ft =0.305 m
  13. What is the quality of 87% wet steam?
    For 87% wet steam, x=0.13
  14. What is the definition of "quality" for specific volume?
    chart?chf=bg,s,00000000&cht=tx&chl=x%3D%5Cfrac%7Bv-v_f%7D%7Bv_%7Bfg%7D%7D&chs=146x74
  15. Given hf, hfg, and x, what is h?
    h = hf +xhfg

Card Set Information

Author:
RJVan
ID:
236295
Filename:
Thermodynamic Units 3
Updated:
2016-04-07 20:54:15
Tags:
Heat engineering thermodynamics
Folders:
Mechanical Engineering
Description:
Mechanical Professional Engineering Exam Review
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