9. A(n)
is obtained by mixing slightly more acetylene than oxygen.
neutral flame
c. bra...
Engineering, 28.09.2020 05:01 layshjjbradshaw7250
9. A(n)
is obtained by mixing slightly more acetylene than oxygen.
neutral flame
c. brazing flame
b. oxidizing flame
d. carburizing flame
a.
Answers: 2
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During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false
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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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Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?
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Engineering, 04.07.2019 18:10
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Answers: 3
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