Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning
Exercise : Heat Transfer, Refrigeration and Air Conditioning - Section 7
- Heat Transfer, Refrigeration and Air Conditioning - Section 1
- Heat Transfer, Refrigeration and Air Conditioning - Section 2
- Heat Transfer, Refrigeration and Air Conditioning - Section 3
- Heat Transfer, Refrigeration and Air Conditioning - Section 4
- Heat Transfer, Refrigeration and Air Conditioning - Section 5
- Heat Transfer, Refrigeration and Air Conditioning - Section 6
- Heat Transfer, Refrigeration and Air Conditioning - Section 7
- Heat Transfer, Refrigeration and Air Conditioning - Section 8
21.
The emissive power of a body depends upon its
22.
An electric cable of aluminium conductor (k = 240 W/mK) is to be insulated with rubber (k = 0.15 W/mK). The cable is to be located in air (h = 6 W/m2). The critical thickness of insulation will be
23.
A cube at high temperature is immersed in a constant temperature bath. It loses heat from its top, bottom and side surfaces with heat transfer coefficients of h1, h2 and h3 respectively. The average heat transfer coefficient for the cube is
h1 + h2 + h3
(h1h2h3)1/3
none of these
24.
The dehumidification process, on the psychrometric chart, is shown by
25.
The vertical and uniformly spaced lines on a psychrometric chart indicates
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