1
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
An engine has an efficiency of 1/6. When the temperature of sink is reduced by 62oC, its efficiency is doubled. Temperatures of the source is
A
37oC
B
62oC
C
99oC
D
124oC.
2
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
A Carnot engine whose sink is at 300 K has an efficiency of 40%. By how much should the temperature of source be increased so as to increase its efficiency by 50% of original efficiency ?
A
380 K
B
275 K
C
325 K
D
250 K
3
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
The molar specific heat at constant pressure of an ideal gas is (7/2) R. The ratio of specific heat at constant pressure to that at constant volume is
A
9/7
B
7/5
C
8/7
D
5/7
4
AIPMT 2005
MCQ (Single Correct Answer)
+4
-1
An ideal gas heat engine operates in Carnot cycle between 227oC and 127oC. It absorbs 6 $$ \times $$ 104 cal of heat at higher temperature. Amount of heat converted to work is
A
4.8 $$ \times $$ 104 cal
B
6 $$ \times $$ 104 cal
C
2.4 $$ \times $$ 104 cal
D
1.2 $$ \times $$ 104 cal.
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