Download PTU B.Tech 2020 March Aero 4th Sem ANE 208 Aircraft Propulsion I Question Paper

Download PTU (I.K. Gujral Punjab Technical University Jalandhar (IKGPTU) ) BE/BTech Aero (Aerospace-Engg) 2020 March 4th Sem ANE 208 Aircraft Propulsion I Previous Question Paper

1 | M-60516 (S2)-2299
Roll No. Total No. of Pages : 02
Total No. of Questions : 09
B.Tech.(ANE) (Sem.?4)
AIRCRAFT PROPULSION ? I
Subject Code : ANE-208
M.Code : 60516
Time : 3 Hrs. Max. Marks : 60
INSTRUCTIONS 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. Answer briefly :
a) Define thermal conductivity.
b) Define forced convection.
c) Define activity factor.
d) Define B.H.P.
e) Define slip factor.
f) Define polytropic efficiency.
g) Define thrust augmentation.
h) Define installed thrust.
i) Define T.D.C.
j) Define thermal efficiency.

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1 | M-60516 (S2)-2299
Roll No. Total No. of Pages : 02
Total No. of Questions : 09
B.Tech.(ANE) (Sem.?4)
AIRCRAFT PROPULSION ? I
Subject Code : ANE-208
M.Code : 60516
Time : 3 Hrs. Max. Marks : 60
INSTRUCTIONS 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. Answer briefly :
a) Define thermal conductivity.
b) Define forced convection.
c) Define activity factor.
d) Define B.H.P.
e) Define slip factor.
f) Define polytropic efficiency.
g) Define thrust augmentation.
h) Define installed thrust.
i) Define T.D.C.
j) Define thermal efficiency.

2 | M-60516 (S2)-2299
SECTION-B
2. An insulated wall is to be constructed to brick 20 cm thick, and plaster 2.5 cms thick with
Rockwool insulator in between. The outer surfaces of bricks and plaster are at
temperature 600?C & 50?C respectively. Calculate the thickness of insulation ; Heat loss
per square meter shall not exceed 600 W. The conductivities of brick, rock-wool and
plaster are 0.32, 0.045 and 0.7 w/m-k respectively.
3. Derive the expression of ideal efficiency for the propeller with the help of momentum
theory.
4. Describe lubricating system for an I.C. engine with the help of neat diagrams.
5. Derive an expression of work and efficiency for an ideal Brayton cycle.
6. Describe working of a can type combustion chamber with the help of a neat diagram.

SECTION-C
7. Derive the expressions for work done and pressure rise across a centrifugal compressor
using velocity triangles.
8. A vertical pipe 5 cm diameter carrying hot water is exposed to ambient air at 15?C. If the
outer surface of the pipe is 65?C, find the heat loss from one metre height of the pipe per
hour. Properties of air at
65 15
2
? ? ?
? ?
? ?
= 40?C are given below :
? = 1.128 kg/m
3
, ? = 19.1 ? 10
?6
kg/m-s, ? = 16.96 ? 10
?6
m
3
/sec, C
p
= 1007 J/kg ? k,
K = 0.027 W/m?k.
9. A four-cylinder four-stroke petrol engine develops 14.7 kW at 1000 rpm. Mean effective
pressure is 5.5 bar. Calculate bore and stroke of the engine, if the length of stroke is 1.5
times the bore.



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.
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