Download PTU (I.K. Gujral Punjab Technical University Jalandhar (IKGPTU) ) BE/BTech AE (Automobile Engineering) 2020 March 5th Sem BTAE 503 Heat Transfer Previous Question Paper
Roll No. Total No. of Pages : 02
Total No. of Questions : 09
B.Tech.(AE) (2012 to 2017) (Sem.?5)
HEAT TRANSFER
Subject Code : BTAE-503
M.Code : 70486
Time : 3 Hrs. Max. Marks : 60
INSTRUCTION TO CANDIDATES :
1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks
each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students
have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students
have to attempt any TWO questions.
SECTION-A
1. Write briefly :
a. Explain the mechanism of heat transfer in fluids.
b. Write the Fourier?s equation of conduction in spherical coordinates.
c. Explain the importance of critical thickness of insulation.
d. What do you mean by thermal stresses?
e. Define LMTD and what is its importance?
f. Why counter flow heat exchanger is more effective than parallel flow?
g. What is the effect of temperature and pressure on thermal conductivity of solids?
h. What is characteristic length?
i. Which dimensionless number is more significant in turbulent flow?
j. State Kirchhoff?s law?
FirstRanker.com - FirstRanker's Choice
1 | M-70486 (S2)-151
Roll No. Total No. of Pages : 02
Total No. of Questions : 09
B.Tech.(AE) (2012 to 2017) (Sem.?5)
HEAT TRANSFER
Subject Code : BTAE-503
M.Code : 70486
Time : 3 Hrs. Max. Marks : 60
INSTRUCTION TO CANDIDATES :
1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks
each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students
have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students
have to attempt any TWO questions.
SECTION-A
1. Write briefly :
a. Explain the mechanism of heat transfer in fluids.
b. Write the Fourier?s equation of conduction in spherical coordinates.
c. Explain the importance of critical thickness of insulation.
d. What do you mean by thermal stresses?
e. Define LMTD and what is its importance?
f. Why counter flow heat exchanger is more effective than parallel flow?
g. What is the effect of temperature and pressure on thermal conductivity of solids?
h. What is characteristic length?
i. Which dimensionless number is more significant in turbulent flow?
j. State Kirchhoff?s law?
2 | M-70486 (S2)-151
SECTION-B
2. What is thermal diffusivity? Discuss its significance.
3. Derive and plot the temperature distribution in a plane wall with heat generation.
4. A thick-walled tube of stainless steel [18% Cr, 8% Ni, k = 19 W/m?C] with 2-cm inner
diameter (ID) and 4-cm outer diameter (OD) is covered with a 3-cm layer of asbestos
insulation [k = 0.2 W/m?C], If the inside wall temperature of the pipe is maintained at
600?C, calculate the heat loss per meter of length. Also calculate the tube -insulation
interface temperature.
5. Derive the relationship for the heat transfer from the fin insulated at tip.
6. What are Newtonian and non-Newtonian fluids? Give examples.
SECTION-C
7. The variation in the thermal conductivity of a material is given by K = K
o
(1 + ?T + ?T
2
),
find the expression for the steady state heat transfer in wall of thickness L maintained at
surface temperatures T
1
and T
2
(T
1
> T
2
).
8. Two rectangles 50 by 50 cm are placed perpendicularly with a common edge. One
surface has T1 = 1000 K, ?
1
= 0.6, while the other surface is insulated and in radiant
balance with a large surrounding room at 300 K. Determine the temperature of the
insulated surface and the heat lost by the surface at 1000 K.
9. Discuss the various parameters that affects the IC engine heat transfer.
NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.
FirstRanker.com - FirstRanker's Choice
This post was last modified on 21 March 2020