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  • Question

  • The logarithmic mean temperature difference (tm) is given by (where ?t1 and ?t2 are temperature differences between the hot and cold fluids at entrance and exit)


  • Options
  • A. The logarithmic mean temperature difference (tm) is given by (where ?t1 and ?t2 are temperature diff
  • B. The logarithmic mean temperature difference (tm) is given by (where ?t1 and ?t2 are temperature diff
  • C. tm = (?t1 - ?t1) loge(?t1/?t1)
  • D. The logarithmic mean temperature difference (tm) is given by (where ?t1 and ?t2 are temperature diff

  • Correct Answer
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    • More questions

    • 1. In compression test, the fracture in cast iron specimen would occur along

    • Options
    • A. the axis of load
    • B. an oblique plane
    • C. at right angles to the axis of specimen
    • D. would not occur
      • Discuss
    • 2. The correct sequence of tool materials in increasing order of their ability to retain their hot hardness is

    • Options
    • A. carbide, ceramic, cermet, borazon
    • B. ceramic, carbide, borazon, cermet
    • C. cermet, carbide, ceramic, borazon
    • D. borazon, ceramic, carbide, cermet
      • Discuss
    • 3. The ratio of specific weight of a liquid to the specific weight of pure water at a standard temperature is called

    • Options
    • A. density of liquid
    • B. specific gravity of liquid
    • C. compressibility of liquid
    • D. surface tension of liquid
      • Discuss
    • 4. A steel bar of 5 mm is heated from 15° C to 40° C and it is free to expand. The bar Will induce

    • Options
    • A. no stress
    • B. shear stress
    • C. tensile stress
    • D. compressive stress
      • Discuss
    • 5. Viscous force is the __________ of shear stress due to viscosity and cross-sectionar area of flow.

    • Options
    • A. sum
    • B. different
    • C. product
    • D. ratio
      • Discuss
    • 6. Which of the following statement is wrong?

    • Options
    • A. The mortise gauge has two scribing pins.
    • B. The gouges are chisels with a hollow shaped blade.
    • C. An auger is a planing tool
    • D. all of these
      • Discuss
    • 7. In a flange coupling, the thickness of flanges is taken as one-half the diameter of shaft.

    • Options
    • A. Agree
    • B. Disagree
      • Discuss
    • 8. Shear strength of the welded joint for double parallel fillet is (where ? = Allowable shear stress for weld metal)

    • Options
    • A. 0.5 s.l.?
    • B. s.l.?
    • C. 2 s.l.?
    • D. 2.s.l.?
      • Discuss
    • 9. The bending moment diagram for a cantilever beam of length l and carrying a gradually varying load from zero at the free end and w per unit length at the fixed end is a parabolic curve.

    • Options
    • A. Agree
    • B. Disagree
      • Discuss
    • 10. In a venturiflume, the flow takes place at

    • Options
    • A. atmospheric pressure
    • B. gauge pressure
    • C. absolute pressure
    • D. none of these
      • Discuss

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