The boiling point of R-12 is about – 30°C.
Question: The boiling point of R-12 is about – 30°C.
[A].
True
False
[A].
[B].
Answer: Option A
Explanation:
No answer description available for this question.
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In mechanical refrigeration system, the refrigerant occurs as liquid between condenser and expansion valve.
Question: In mechanical refrigeration system, the refrigerant occurs as liquid between condenser and expansion valve.
[A].True [B].
False Answer: Option A
Explanation:
No answer description available for this question.
Vertical lines on pressure-enthalpy chart show constant_______________?
Vertical lines on pressure-enthalpy chart show constant_______________?A. pressure lines
B. temperature lines
C. total heat lines
D. entropy lines
E. volume linesEutectoid reaction occurs at
Question: Eutectoid reaction occurs at
[A].600°C [B].
723°C [C].
1147°C [D].
1493°C Answer: Option B
Explanation:
No answer description available for this question.
If average heat transfer co-efficient is ha and the local coefficient at the end of the plate is hl then in case of heat transfer to a fluid flowing over a flat plate, heated over its entire length
Question: If average heat transfer co-efficient is ha and the local coefficient at the end of the plate is hl then in case of heat transfer to a fluid flowing over a flat plate, heated over its entire length
[A].ha = hl [B].
ha = 2hl [C].
ha = 0.5 hl [D].
ha = 0.75 hl Answer: Option B
Explanation:
No answer description available for this question.
The air standard efficiency of an I.C. engine depends on
Question: The air standard efficiency of an I.C. engine depends on
[A].fuel used [B].
speed of engine [C].
compression ratio [D].
none of these Answer: Option C
Explanation:
No answer description available for this question.
A one tonne refrigerating machine means that
Question: A one tonne refrigerating machine means that
[A].one tonne is the total mass of machine [B].
one tonne refrigerant is used [C].
one tonne of water can be converted into ice [D].
one tonne of ice when melts from and at 0° C in 24 hours, the refrigeration effect is equivalent to 210 kJ/min Answer: Option D
Explanation:
No answer description available for this question.