Sample Paper HMT EME504
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MECHANICAL ENGINEERING DEPARTMENT BIT MEERUT SECOND SESSIONAL EXAMINATION, OCTOBER- 2013 YEAR & SEMESTER-THIRD (5 TH SEM) DATE OF EXAM- SUBJECT & CODE- HMT(EME-504) TIME-1:30 HOURS ROLL NO. TOTAL MARKS- 30 Attempt all questions (6x5) Q 1. Explain the lumped parameter analysis for transient heat conduction. Explain the Significance of Heisler charts in solving transient heat conduction problems Q 2. Derive an expression for LMTD in the case of counter flow heat exchanger. What do you mean by fouling in heat exchanger ? Define effectiveness of heat exchanger. Q 3. Classify heat exchangers. Derive an expression for effectiveness by NTU(number of transfer units) method for the parallel flow heat exchanger. Q4 Explain Fick’s law of diffusion with figure. Explain its various terms. Define and derive an expression for an equimolar couter flow diffusion. Q 5. Explain briefly the various regimes of saturated pool boiling with boiling curve.Diffrentiate between the mechanism of film condensation dropwise condensation. Q 6. A carbon steel (AISI 1010) shaft of 0.2 m diameter is heat treated in a gas fired furnace whose gases are at 1200K and provide a convection coefficient of 80 W/(m 2 K). If the shaft enters the furnace at 300 K, how long must it remain in the furnace to achieve a center line temperature of 900K ? Given thermo physical properties of AISI 1010 carbon steel ᵨ=7854m 3 kg, k = 48.8 W/(mK), cp=559 J/(kgK)
description
Includes Heat exchangers, boiling & condensation, mass transfer
Transcript of Sample Paper HMT EME504
MECHANICAL ENGINEERING DEPARTMENT BIT MEERUT
SECOND SESSIONAL EXAMINATION, OCTOBER- 2013
YEAR & SEMESTER-THIRD (5TH
SEM) DATE OF EXAM-
SUBJECT & CODE- HMT(EME-504) TIME-1:30 HOURS
ROLL NO. TOTAL MARKS- 30
Attempt all questions (6x5)
Q 1. Explain the lumped parameter analysis for transient heat conduction. Explain the
Significance of Heisler charts in solving transient heat conduction problems
Q 2. Derive an expression for LMTD in the case of counter flow heat exchanger. What do you
mean by fouling in heat exchanger ? Define effectiveness of heat exchanger.
Q 3. Classify heat exchangers. Derive an expression for effectiveness by NTU(number of transfer
units) method for the parallel flow heat exchanger.
Q4 Explain Fick’s law of diffusion with figure. Explain its various terms. Define and derive an
expression for an equimolar couter flow diffusion.
Q 5. Explain briefly the various regimes of saturated pool boiling with boiling curve.Diffrentiate
between the mechanism of film condensation dropwise condensation.
Q 6. A carbon steel (AISI 1010) shaft of 0.2 m diameter is heat treated in a gas fired furnace whose gases are at
1200K and provide a convection coefficient of 80 W/(m2K). If the shaft enters the furnace at 300 K, how long
must it remain in the furnace to achieve a center line temperature of 900K ? Given thermo physical properties
of AISI 1010 carbon steel ᵨ=7854m3kg, k = 48.8 W/(mK), cp=559 J/(kgK)
