1
GATE ME 1995
MCQ (Single Correct Answer)
+1
-0.3
Constant pressure lines in the super-heated region of the Mollier diagram will have
A
A positive slope
B
A negative slope
C
Zero slope
D
Both positive and negative slope
2
GATE ME 1995
MCQ (Single Correct Answer)
+1
-0.3
Consider a refrigerator and a heat pump working on the reversed Carnot cycle between the same temperature limits. Which of the following is correct?
A
$$COP$$ refrigerator $$= COP$$ of heat pump
B
$$COP$$ of refrigerator $$= COP$$ of heat pump $$+ 1$$
C
$$COP$$ of refrigerator $$= COP$$ of heat pump $$- 1$$
D
$$COP$$ of refrigerator $$=$$ inverse $$COP$$ of heat pump
3
GATE ME 1995
Fill in the Blanks
+1
-0
In the case of a refrigeration system undergoing an irreversible cycle, $$\oint {{{SQ} \over T}} $$ is _____________$$\left( { < 0/ = 0/ > 0} \right)$$
4
GATE ME 1995
MCQ (Single Correct Answer)
+2
-0.6
One kilomole of an ideal gas is throttled from an initial pressure of $$0.5$$ $$MPa$$ to $$0.1$$ $$MPa.$$ The initial temperature is $$300$$ $$K.$$ The entropy change of the universe is:
A
$$13.38$$ $$kJ/K$$
B
$$4014.3$$ $$kJ/K$$
C
$$0.0446kJ/K$$
D
$$-0.0446$$ $$kJ/K$$
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
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CBSE
Class 12