Q1.In a condenser of a power plant, the steam condenses at a temperature of 60o C .
The cooling water enters at 30o C and leaves at 45o C . The logarithmic mean
temperature difference (LMTD) of the condenser is
Answer : Option BExplaination / Solution:
Flow configuration in condenser as shown below.
Q5.A manufacturer can produce 12000 bearings per day. The manufacturer received an order of
8000 bearings per day from a customer. The cost of holding a bearing in stock is Rs.0.20 per
month. Setup cost per production run is Rs.500. Assuming 300 working days in a year, the
frequency of production run should be
Answer : Option CExplaination / Solution: No Explaination.
Answer : Option DExplaination / Solution:
Heat and work are path functions.
Since δQ and δW are dependent on path followed between two given end states
of a thermodynamic process undergone by system.
Q10.A pipe of 25mm outer diameter carries steam. The heat transfer coefficient
between the cylinder and surroundings is 5W /m2K . It is proposed to reduce the
heat loss from the pipe by adding insulation having a thermal conductivity of
0.05W/mK. Which one of the following statements is TRUE?
Answer : Option CExplaination / Solution: No Explaination.
Total Question/Mark :
Scored Mark :
Mark for Correct Answer : 1
Mark for Wrong Answer : -0.5
Mark for Left Answer : 0