IES/ESE Paper (Mechanical) Prelims Paper II - 2019 | GATE, ISRO & IES/ESE Previous Year Solved Papers - Mechanical Engineering PDF Download

 Page 1


Engineering Service (P) Exam,2019 
DO NOT OPEN THIS TEST BOOKLET UNTIL YOU ARE TOLD TO DO SO 
T.B.C. : VBY-S-MCH 	 Test Booklet Series 
Serial No. 
007795? 
TEST BOOKLET 
MECHANICAL ENGINEERING 
Time Allowed : Three Hours 
	 Maximum Marks : 300 
INSTRUCTIONS 
IMMEDIATELY AFTER THE COMMENCEMENT OF THE EXAMINATION, YOU SHOULD CHECK 
THAT THIS TEST BOOKLET DOES NOT HAVE ANY UNPRINTED OR TORN OR MISSING PAGES 
OR ITEMS, ETC. IF SO, GET IT REPLACED BY A COMPLETE TEST BOOKLET. 
Please note that it is the candidate's responsibility to encode and fill in the Roll Number 
and Test Booklet Series A, B, C or D carefully and without any omission or discrepancy at 
the appropriate places in the OMR Answer Sheet. Any omission/discrepancy will render 
the Answer Sheet liable for rejection. 
You have to enter your Roll Number on the Test Booklet in 
the Box provided alongside. DO NOT write anything else on 
the Test Booklet. 
This Test Booklet contains 150 items (questions). Each item comprises four responses (answers). 
You will select the response which you want to mark on the Answer Sheet. In case you feel that 
there is more than one correct response, mark the response which you consider the best. In any 
case, choose ONLY ONE response for each item. 
You have to mark your responses ONLY on the separate Answer Sheet provided. See directions in 
the Answer Sheet. 
All items carry equal marks. 
Before you proceed to mark in the Answer Sheet the response to various items in the Test 
Booklet, you have to fill in some particulars in the Answer Sheet as per instructions sent to you 
with your Admission Certificate. 
After you have completed filling in all your responses on the Answer Sheet and the examination 
has concluded, you should hand over to the Invigilator only the Answer Sheet. You are permitted 
to take away with you the Test Booklet. 
Sheets for rough work are appended in the Test Booklet at the end. 
Penalty for wrong answers : 
THERE WILL BE PENALTY FOR WRONG ANSWERS MARKED BY A CANDIDATE. 
There are four alternatives for the answer to every question. For each question for which a 
wrong answer has been given by the candidate, one-third (0.33) of the marks assigned to 
that question will be deducted as penalty. 
If a candidate gives more than one answer, it will be treated as a wrong answer even if one of 
the given answers happens to be correct and there will be same penalty as above to that 
question. 
If a question is left blank, i.e., no answer is given by the candidate, there will be no penalty 
for that question. 
DO NOT OPEN THIS TEST BOOKLET UNTIL YOU ARE TOLD TO DO SO 
Page 2


Engineering Service (P) Exam,2019 
DO NOT OPEN THIS TEST BOOKLET UNTIL YOU ARE TOLD TO DO SO 
T.B.C. : VBY-S-MCH 	 Test Booklet Series 
Serial No. 
007795? 
TEST BOOKLET 
MECHANICAL ENGINEERING 
Time Allowed : Three Hours 
	 Maximum Marks : 300 
INSTRUCTIONS 
IMMEDIATELY AFTER THE COMMENCEMENT OF THE EXAMINATION, YOU SHOULD CHECK 
THAT THIS TEST BOOKLET DOES NOT HAVE ANY UNPRINTED OR TORN OR MISSING PAGES 
OR ITEMS, ETC. IF SO, GET IT REPLACED BY A COMPLETE TEST BOOKLET. 
Please note that it is the candidate's responsibility to encode and fill in the Roll Number 
and Test Booklet Series A, B, C or D carefully and without any omission or discrepancy at 
the appropriate places in the OMR Answer Sheet. Any omission/discrepancy will render 
the Answer Sheet liable for rejection. 
You have to enter your Roll Number on the Test Booklet in 
the Box provided alongside. DO NOT write anything else on 
the Test Booklet. 
This Test Booklet contains 150 items (questions). Each item comprises four responses (answers). 
You will select the response which you want to mark on the Answer Sheet. In case you feel that 
there is more than one correct response, mark the response which you consider the best. In any 
case, choose ONLY ONE response for each item. 
You have to mark your responses ONLY on the separate Answer Sheet provided. See directions in 
the Answer Sheet. 
All items carry equal marks. 
Before you proceed to mark in the Answer Sheet the response to various items in the Test 
Booklet, you have to fill in some particulars in the Answer Sheet as per instructions sent to you 
with your Admission Certificate. 
After you have completed filling in all your responses on the Answer Sheet and the examination 
has concluded, you should hand over to the Invigilator only the Answer Sheet. You are permitted 
to take away with you the Test Booklet. 
Sheets for rough work are appended in the Test Booklet at the end. 
Penalty for wrong answers : 
THERE WILL BE PENALTY FOR WRONG ANSWERS MARKED BY A CANDIDATE. 
There are four alternatives for the answer to every question. For each question for which a 
wrong answer has been given by the candidate, one-third (0.33) of the marks assigned to 
that question will be deducted as penalty. 
If a candidate gives more than one answer, it will be treated as a wrong answer even if one of 
the given answers happens to be correct and there will be same penalty as above to that 
question. 
If a question is left blank, i.e., no answer is given by the candidate, there will be no penalty 
for that question. 
DO NOT OPEN THIS TEST BOOKLET UNTIL YOU ARE TOLD TO DO SO 
	 1. Water is discharged from a tank 	 4. 
A nozzle at the end of an 80 mm hosepipe 
	 maintained at a constant head of 5 m 	 produces a jet 40 mm in diameter. 
	 above the exit of a straight pipe 100 m 	 When it is discharging the water 
	 long and 15 cm in diameter. If the 	 1200 Lpm, the force on the joint at the 
	 friction coefficient for the pipe is 0.01, 	 base of the nozzle will be 
the rate of flow will be nearly 
0.04 m3  /s 
005 M3  /s 
0.06 m3  /s 
0.07 m3  /s 
 180 N 
 200 N 
 220 N 
 240 N 
2. A plate weighing 150 N and measuring 
0.8 m x 0.8 m just slides down an 
inclined plane over an oil film of F2 mm 
thickness for an inclination of 30° and 
velocity of 0.2 m/s. Then the viscosity of 
the oil used is 
5. A vertical water pipe, 1.5 m long, tapers 
from 75 mm diameter at the bottom to 
150 mm diameter at the top and the 
rate of flow is 50 L/s upwards. If 
the pressure at the bottom end is 
150 kN/m2, the pressure at the top will 
be nearly 
(a) 0.3 N s/m 2  
(a) 
1952 . 	 kN/m 2  
(b) 0.4 N s/m 2  
 
1914 kN/m2  
 0.5 N s/m 2  
(c) 
187.6 kN/m2  
(d) 0.7 N s/m
2  (d) 
183.8 kN/m2  
3. A spherical balloon of 1.5 m diameter is 
completely immersed in water and 
chained to the bottom. If the chain has 
a tension of 10 kN, the weight of the 
balloon will be nearly 
6. The stream function for a flow field is 
w = 3x2  y + (2 + t)y2. The velocity at a 
point P for position vector r = i + 2j- 3k 
at time t = 2 will be 
(a) 9.11 kN 
(a) 19i - 12j 
(b) 8.22 kN 
 21i-12j 
 644 kN 
(c) 19i +22 j 
(d) 7.33 kN (d) 21i+22j 
VBY-S-MCH/ 50A 	 2 
Page 3


Engineering Service (P) Exam,2019 
DO NOT OPEN THIS TEST BOOKLET UNTIL YOU ARE TOLD TO DO SO 
T.B.C. : VBY-S-MCH 	 Test Booklet Series 
Serial No. 
007795? 
TEST BOOKLET 
MECHANICAL ENGINEERING 
Time Allowed : Three Hours 
	 Maximum Marks : 300 
INSTRUCTIONS 
IMMEDIATELY AFTER THE COMMENCEMENT OF THE EXAMINATION, YOU SHOULD CHECK 
THAT THIS TEST BOOKLET DOES NOT HAVE ANY UNPRINTED OR TORN OR MISSING PAGES 
OR ITEMS, ETC. IF SO, GET IT REPLACED BY A COMPLETE TEST BOOKLET. 
Please note that it is the candidate's responsibility to encode and fill in the Roll Number 
and Test Booklet Series A, B, C or D carefully and without any omission or discrepancy at 
the appropriate places in the OMR Answer Sheet. Any omission/discrepancy will render 
the Answer Sheet liable for rejection. 
You have to enter your Roll Number on the Test Booklet in 
the Box provided alongside. DO NOT write anything else on 
the Test Booklet. 
This Test Booklet contains 150 items (questions). Each item comprises four responses (answers). 
You will select the response which you want to mark on the Answer Sheet. In case you feel that 
there is more than one correct response, mark the response which you consider the best. In any 
case, choose ONLY ONE response for each item. 
You have to mark your responses ONLY on the separate Answer Sheet provided. See directions in 
the Answer Sheet. 
All items carry equal marks. 
Before you proceed to mark in the Answer Sheet the response to various items in the Test 
Booklet, you have to fill in some particulars in the Answer Sheet as per instructions sent to you 
with your Admission Certificate. 
After you have completed filling in all your responses on the Answer Sheet and the examination 
has concluded, you should hand over to the Invigilator only the Answer Sheet. You are permitted 
to take away with you the Test Booklet. 
Sheets for rough work are appended in the Test Booklet at the end. 
Penalty for wrong answers : 
THERE WILL BE PENALTY FOR WRONG ANSWERS MARKED BY A CANDIDATE. 
There are four alternatives for the answer to every question. For each question for which a 
wrong answer has been given by the candidate, one-third (0.33) of the marks assigned to 
that question will be deducted as penalty. 
If a candidate gives more than one answer, it will be treated as a wrong answer even if one of 
the given answers happens to be correct and there will be same penalty as above to that 
question. 
If a question is left blank, i.e., no answer is given by the candidate, there will be no penalty 
for that question. 
DO NOT OPEN THIS TEST BOOKLET UNTIL YOU ARE TOLD TO DO SO 
	 1. Water is discharged from a tank 	 4. 
A nozzle at the end of an 80 mm hosepipe 
	 maintained at a constant head of 5 m 	 produces a jet 40 mm in diameter. 
	 above the exit of a straight pipe 100 m 	 When it is discharging the water 
	 long and 15 cm in diameter. If the 	 1200 Lpm, the force on the joint at the 
	 friction coefficient for the pipe is 0.01, 	 base of the nozzle will be 
the rate of flow will be nearly 
0.04 m3  /s 
005 M3  /s 
0.06 m3  /s 
0.07 m3  /s 
 180 N 
 200 N 
 220 N 
 240 N 
2. A plate weighing 150 N and measuring 
0.8 m x 0.8 m just slides down an 
inclined plane over an oil film of F2 mm 
thickness for an inclination of 30° and 
velocity of 0.2 m/s. Then the viscosity of 
the oil used is 
5. A vertical water pipe, 1.5 m long, tapers 
from 75 mm diameter at the bottom to 
150 mm diameter at the top and the 
rate of flow is 50 L/s upwards. If 
the pressure at the bottom end is 
150 kN/m2, the pressure at the top will 
be nearly 
(a) 0.3 N s/m 2  
(a) 
1952 . 	 kN/m 2  
(b) 0.4 N s/m 2  
 
1914 kN/m2  
 0.5 N s/m 2  
(c) 
187.6 kN/m2  
(d) 0.7 N s/m
2  (d) 
183.8 kN/m2  
3. A spherical balloon of 1.5 m diameter is 
completely immersed in water and 
chained to the bottom. If the chain has 
a tension of 10 kN, the weight of the 
balloon will be nearly 
6. The stream function for a flow field is 
w = 3x2  y + (2 + t)y2. The velocity at a 
point P for position vector r = i + 2j- 3k 
at time t = 2 will be 
(a) 9.11 kN 
(a) 19i - 12j 
(b) 8.22 kN 
 21i-12j 
 644 kN 
(c) 19i +22 j 
(d) 7.33 kN (d) 21i+22j 
VBY-S-MCH/ 50A 	 2 
an incompressible flow 
an unsteady and incompressible 
flow 
an unsteady and compressible flow 
 8300 m 
 8240 m 
 8110 m 
 8000 m 
7. In a laminar flow through pipe, the point 
of maximum instability exists at a 
distance of y from the wall which is 
of pipe radius R 
of pipe radius R 
of pipe radius R 
of pipe radius R 
,,  
8. v = — -= - 	 for a turbulent flow 
ax ay 
signifies 
conservation of bulk momentum 
transport 
increase in u' in x-direction 
followed by increase in it in 
negative y-direction 
turbulence is anisotropic 
turbulence is isotropic 
9. A flow field satisfying V • - I; = 0 as the 
continuity equation represents always 
(a) a steady compressible flow  
10. An oil of viscosity 8 poise flows between 
two parallel fixed plates, which are kept 
at a distance of 30 mm apart. If the 
drop of pressure for a length of 1 m is 
0.3 x 104  N/m 2  and width of the plates 
is 500 mm, the rate of oil flow between 
the plates will be 
4.2 x 10-3  m3/s 
54 x10 3  m3/s 
6.6 x 10-3  m3/s 
7.8 x 10
-3 
m3/s 
11. In case of transmission of hydraulic 
power by a pipeline to a turbine in a 
hydroelectric power station, the 
maximum power transmission efficiency 
through the pipeline is 
 76% 
 67% 
 54% 
 42% 
12. A pipe, having a length 200 m and 
200 mm diameter with friction factor 
0.015, is to be replaced by a 400 mm 
diameter pipe of friction factor 0.012 to 
convey the same quantity of flow. The 
equivalent length of the new pipe for the 
same head loss will be 
VBY-S-MCH/ 50A 
	 3 	 [ P.T.O. 
Page 4


Engineering Service (P) Exam,2019 
DO NOT OPEN THIS TEST BOOKLET UNTIL YOU ARE TOLD TO DO SO 
T.B.C. : VBY-S-MCH 	 Test Booklet Series 
Serial No. 
007795? 
TEST BOOKLET 
MECHANICAL ENGINEERING 
Time Allowed : Three Hours 
	 Maximum Marks : 300 
INSTRUCTIONS 
IMMEDIATELY AFTER THE COMMENCEMENT OF THE EXAMINATION, YOU SHOULD CHECK 
THAT THIS TEST BOOKLET DOES NOT HAVE ANY UNPRINTED OR TORN OR MISSING PAGES 
OR ITEMS, ETC. IF SO, GET IT REPLACED BY A COMPLETE TEST BOOKLET. 
Please note that it is the candidate's responsibility to encode and fill in the Roll Number 
and Test Booklet Series A, B, C or D carefully and without any omission or discrepancy at 
the appropriate places in the OMR Answer Sheet. Any omission/discrepancy will render 
the Answer Sheet liable for rejection. 
You have to enter your Roll Number on the Test Booklet in 
the Box provided alongside. DO NOT write anything else on 
the Test Booklet. 
This Test Booklet contains 150 items (questions). Each item comprises four responses (answers). 
You will select the response which you want to mark on the Answer Sheet. In case you feel that 
there is more than one correct response, mark the response which you consider the best. In any 
case, choose ONLY ONE response for each item. 
You have to mark your responses ONLY on the separate Answer Sheet provided. See directions in 
the Answer Sheet. 
All items carry equal marks. 
Before you proceed to mark in the Answer Sheet the response to various items in the Test 
Booklet, you have to fill in some particulars in the Answer Sheet as per instructions sent to you 
with your Admission Certificate. 
After you have completed filling in all your responses on the Answer Sheet and the examination 
has concluded, you should hand over to the Invigilator only the Answer Sheet. You are permitted 
to take away with you the Test Booklet. 
Sheets for rough work are appended in the Test Booklet at the end. 
Penalty for wrong answers : 
THERE WILL BE PENALTY FOR WRONG ANSWERS MARKED BY A CANDIDATE. 
There are four alternatives for the answer to every question. For each question for which a 
wrong answer has been given by the candidate, one-third (0.33) of the marks assigned to 
that question will be deducted as penalty. 
If a candidate gives more than one answer, it will be treated as a wrong answer even if one of 
the given answers happens to be correct and there will be same penalty as above to that 
question. 
If a question is left blank, i.e., no answer is given by the candidate, there will be no penalty 
for that question. 
DO NOT OPEN THIS TEST BOOKLET UNTIL YOU ARE TOLD TO DO SO 
	 1. Water is discharged from a tank 	 4. 
A nozzle at the end of an 80 mm hosepipe 
	 maintained at a constant head of 5 m 	 produces a jet 40 mm in diameter. 
	 above the exit of a straight pipe 100 m 	 When it is discharging the water 
	 long and 15 cm in diameter. If the 	 1200 Lpm, the force on the joint at the 
	 friction coefficient for the pipe is 0.01, 	 base of the nozzle will be 
the rate of flow will be nearly 
0.04 m3  /s 
005 M3  /s 
0.06 m3  /s 
0.07 m3  /s 
 180 N 
 200 N 
 220 N 
 240 N 
2. A plate weighing 150 N and measuring 
0.8 m x 0.8 m just slides down an 
inclined plane over an oil film of F2 mm 
thickness for an inclination of 30° and 
velocity of 0.2 m/s. Then the viscosity of 
the oil used is 
5. A vertical water pipe, 1.5 m long, tapers 
from 75 mm diameter at the bottom to 
150 mm diameter at the top and the 
rate of flow is 50 L/s upwards. If 
the pressure at the bottom end is 
150 kN/m2, the pressure at the top will 
be nearly 
(a) 0.3 N s/m 2  
(a) 
1952 . 	 kN/m 2  
(b) 0.4 N s/m 2  
 
1914 kN/m2  
 0.5 N s/m 2  
(c) 
187.6 kN/m2  
(d) 0.7 N s/m
2  (d) 
183.8 kN/m2  
3. A spherical balloon of 1.5 m diameter is 
completely immersed in water and 
chained to the bottom. If the chain has 
a tension of 10 kN, the weight of the 
balloon will be nearly 
6. The stream function for a flow field is 
w = 3x2  y + (2 + t)y2. The velocity at a 
point P for position vector r = i + 2j- 3k 
at time t = 2 will be 
(a) 9.11 kN 
(a) 19i - 12j 
(b) 8.22 kN 
 21i-12j 
 644 kN 
(c) 19i +22 j 
(d) 7.33 kN (d) 21i+22j 
VBY-S-MCH/ 50A 	 2 
an incompressible flow 
an unsteady and incompressible 
flow 
an unsteady and compressible flow 
 8300 m 
 8240 m 
 8110 m 
 8000 m 
7. In a laminar flow through pipe, the point 
of maximum instability exists at a 
distance of y from the wall which is 
of pipe radius R 
of pipe radius R 
of pipe radius R 
of pipe radius R 
,,  
8. v = — -= - 	 for a turbulent flow 
ax ay 
signifies 
conservation of bulk momentum 
transport 
increase in u' in x-direction 
followed by increase in it in 
negative y-direction 
turbulence is anisotropic 
turbulence is isotropic 
9. A flow field satisfying V • - I; = 0 as the 
continuity equation represents always 
(a) a steady compressible flow  
10. An oil of viscosity 8 poise flows between 
two parallel fixed plates, which are kept 
at a distance of 30 mm apart. If the 
drop of pressure for a length of 1 m is 
0.3 x 104  N/m 2  and width of the plates 
is 500 mm, the rate of oil flow between 
the plates will be 
4.2 x 10-3  m3/s 
54 x10 3  m3/s 
6.6 x 10-3  m3/s 
7.8 x 10
-3 
m3/s 
11. In case of transmission of hydraulic 
power by a pipeline to a turbine in a 
hydroelectric power station, the 
maximum power transmission efficiency 
through the pipeline is 
 76% 
 67% 
 54% 
 42% 
12. A pipe, having a length 200 m and 
200 mm diameter with friction factor 
0.015, is to be replaced by a 400 mm 
diameter pipe of friction factor 0.012 to 
convey the same quantity of flow. The 
equivalent length of the new pipe for the 
same head loss will be 
VBY-S-MCH/ 50A 
	 3 	 [ P.T.O. 
13. 
Certain quantities cannot be located on 
the graph by a point but are given by 
the area under the curve corresponding 
to the process. These quantities in 
concepts of thermodynamics are called 
as 
cyclic functions 
point functions 
path functions 
real functions 
14. 
When 25 kg of water at 95 °C is mixed 
with 35 kg of water at 35 °C, the 
pressure being taken as constant at 
surrounding temperature of 15 °C, 
and Cp  of water is 4-2 kJ/kg K, the 
decrease in available energy due to 
mixing will be nearly 
(a) 270.5 kJ 
( 1
4 277-6 kJ 
281-8 kJ 
288-7 kJ 
15. A frictionless piston cylinder device 
contains 5 kg of steam at 400 kPa and 
200 °C. The heat is now transferred to 
the steam until the temperature reaches 
250 °C. If the piston is not attached to 
a shaft, its mass is constant, and 
by taking the values of specific 
volume v 1  as 0-53434 m3  /kg and v2  as 
0.59520 m3/kg, the work done by the 
steam during this process is 
121.7 kJ 
137-5 kJ 
153-3 kJ 
189.1 kJ 
16. 
A diesel engine has a compression ratio 
of 14 and cutoff takes place at 6% of the 
stroke. The air standard efficiency will 
be 
 74-5% 
 60-5% 
(C) 52.5% 
(d) 44.5% 
17. 
A gas mixture consists of 3 kg of 02 , 5 kg 
of N2  and 12 kg of CH4. The mass 
fraction and mole fraction of 02  are 
 0-25 and 0-125 
 0-15 and 0-092 
 0-25 and 0.092 
 0-15 and 0-125 
18. An insulated pipe of 50 mm outside 
diameter with c = 0 8 is laid in a room 
at 30 °C. If the surface temperature is 
250 °C and the convective heat transfer 
coefficient is 10 W/m 2  K, the total heat 
loss per unit length of the pipe will be 
 896-6 W/m 
 818-8 W/m 
 786-4 W/m 
 742-2 W/m 
VBY-S-MCH/50A 	 4 
Page 5


Engineering Service (P) Exam,2019 
DO NOT OPEN THIS TEST BOOKLET UNTIL YOU ARE TOLD TO DO SO 
T.B.C. : VBY-S-MCH 	 Test Booklet Series 
Serial No. 
007795? 
TEST BOOKLET 
MECHANICAL ENGINEERING 
Time Allowed : Three Hours 
	 Maximum Marks : 300 
INSTRUCTIONS 
IMMEDIATELY AFTER THE COMMENCEMENT OF THE EXAMINATION, YOU SHOULD CHECK 
THAT THIS TEST BOOKLET DOES NOT HAVE ANY UNPRINTED OR TORN OR MISSING PAGES 
OR ITEMS, ETC. IF SO, GET IT REPLACED BY A COMPLETE TEST BOOKLET. 
Please note that it is the candidate's responsibility to encode and fill in the Roll Number 
and Test Booklet Series A, B, C or D carefully and without any omission or discrepancy at 
the appropriate places in the OMR Answer Sheet. Any omission/discrepancy will render 
the Answer Sheet liable for rejection. 
You have to enter your Roll Number on the Test Booklet in 
the Box provided alongside. DO NOT write anything else on 
the Test Booklet. 
This Test Booklet contains 150 items (questions). Each item comprises four responses (answers). 
You will select the response which you want to mark on the Answer Sheet. In case you feel that 
there is more than one correct response, mark the response which you consider the best. In any 
case, choose ONLY ONE response for each item. 
You have to mark your responses ONLY on the separate Answer Sheet provided. See directions in 
the Answer Sheet. 
All items carry equal marks. 
Before you proceed to mark in the Answer Sheet the response to various items in the Test 
Booklet, you have to fill in some particulars in the Answer Sheet as per instructions sent to you 
with your Admission Certificate. 
After you have completed filling in all your responses on the Answer Sheet and the examination 
has concluded, you should hand over to the Invigilator only the Answer Sheet. You are permitted 
to take away with you the Test Booklet. 
Sheets for rough work are appended in the Test Booklet at the end. 
Penalty for wrong answers : 
THERE WILL BE PENALTY FOR WRONG ANSWERS MARKED BY A CANDIDATE. 
There are four alternatives for the answer to every question. For each question for which a 
wrong answer has been given by the candidate, one-third (0.33) of the marks assigned to 
that question will be deducted as penalty. 
If a candidate gives more than one answer, it will be treated as a wrong answer even if one of 
the given answers happens to be correct and there will be same penalty as above to that 
question. 
If a question is left blank, i.e., no answer is given by the candidate, there will be no penalty 
for that question. 
DO NOT OPEN THIS TEST BOOKLET UNTIL YOU ARE TOLD TO DO SO 
	 1. Water is discharged from a tank 	 4. 
A nozzle at the end of an 80 mm hosepipe 
	 maintained at a constant head of 5 m 	 produces a jet 40 mm in diameter. 
	 above the exit of a straight pipe 100 m 	 When it is discharging the water 
	 long and 15 cm in diameter. If the 	 1200 Lpm, the force on the joint at the 
	 friction coefficient for the pipe is 0.01, 	 base of the nozzle will be 
the rate of flow will be nearly 
0.04 m3  /s 
005 M3  /s 
0.06 m3  /s 
0.07 m3  /s 
 180 N 
 200 N 
 220 N 
 240 N 
2. A plate weighing 150 N and measuring 
0.8 m x 0.8 m just slides down an 
inclined plane over an oil film of F2 mm 
thickness for an inclination of 30° and 
velocity of 0.2 m/s. Then the viscosity of 
the oil used is 
5. A vertical water pipe, 1.5 m long, tapers 
from 75 mm diameter at the bottom to 
150 mm diameter at the top and the 
rate of flow is 50 L/s upwards. If 
the pressure at the bottom end is 
150 kN/m2, the pressure at the top will 
be nearly 
(a) 0.3 N s/m 2  
(a) 
1952 . 	 kN/m 2  
(b) 0.4 N s/m 2  
 
1914 kN/m2  
 0.5 N s/m 2  
(c) 
187.6 kN/m2  
(d) 0.7 N s/m
2  (d) 
183.8 kN/m2  
3. A spherical balloon of 1.5 m diameter is 
completely immersed in water and 
chained to the bottom. If the chain has 
a tension of 10 kN, the weight of the 
balloon will be nearly 
6. The stream function for a flow field is 
w = 3x2  y + (2 + t)y2. The velocity at a 
point P for position vector r = i + 2j- 3k 
at time t = 2 will be 
(a) 9.11 kN 
(a) 19i - 12j 
(b) 8.22 kN 
 21i-12j 
 644 kN 
(c) 19i +22 j 
(d) 7.33 kN (d) 21i+22j 
VBY-S-MCH/ 50A 	 2 
an incompressible flow 
an unsteady and incompressible 
flow 
an unsteady and compressible flow 
 8300 m 
 8240 m 
 8110 m 
 8000 m 
7. In a laminar flow through pipe, the point 
of maximum instability exists at a 
distance of y from the wall which is 
of pipe radius R 
of pipe radius R 
of pipe radius R 
of pipe radius R 
,,  
8. v = — -= - 	 for a turbulent flow 
ax ay 
signifies 
conservation of bulk momentum 
transport 
increase in u' in x-direction 
followed by increase in it in 
negative y-direction 
turbulence is anisotropic 
turbulence is isotropic 
9. A flow field satisfying V • - I; = 0 as the 
continuity equation represents always 
(a) a steady compressible flow  
10. An oil of viscosity 8 poise flows between 
two parallel fixed plates, which are kept 
at a distance of 30 mm apart. If the 
drop of pressure for a length of 1 m is 
0.3 x 104  N/m 2  and width of the plates 
is 500 mm, the rate of oil flow between 
the plates will be 
4.2 x 10-3  m3/s 
54 x10 3  m3/s 
6.6 x 10-3  m3/s 
7.8 x 10
-3 
m3/s 
11. In case of transmission of hydraulic 
power by a pipeline to a turbine in a 
hydroelectric power station, the 
maximum power transmission efficiency 
through the pipeline is 
 76% 
 67% 
 54% 
 42% 
12. A pipe, having a length 200 m and 
200 mm diameter with friction factor 
0.015, is to be replaced by a 400 mm 
diameter pipe of friction factor 0.012 to 
convey the same quantity of flow. The 
equivalent length of the new pipe for the 
same head loss will be 
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	 3 	 [ P.T.O. 
13. 
Certain quantities cannot be located on 
the graph by a point but are given by 
the area under the curve corresponding 
to the process. These quantities in 
concepts of thermodynamics are called 
as 
cyclic functions 
point functions 
path functions 
real functions 
14. 
When 25 kg of water at 95 °C is mixed 
with 35 kg of water at 35 °C, the 
pressure being taken as constant at 
surrounding temperature of 15 °C, 
and Cp  of water is 4-2 kJ/kg K, the 
decrease in available energy due to 
mixing will be nearly 
(a) 270.5 kJ 
( 1
4 277-6 kJ 
281-8 kJ 
288-7 kJ 
15. A frictionless piston cylinder device 
contains 5 kg of steam at 400 kPa and 
200 °C. The heat is now transferred to 
the steam until the temperature reaches 
250 °C. If the piston is not attached to 
a shaft, its mass is constant, and 
by taking the values of specific 
volume v 1  as 0-53434 m3  /kg and v2  as 
0.59520 m3/kg, the work done by the 
steam during this process is 
121.7 kJ 
137-5 kJ 
153-3 kJ 
189.1 kJ 
16. 
A diesel engine has a compression ratio 
of 14 and cutoff takes place at 6% of the 
stroke. The air standard efficiency will 
be 
 74-5% 
 60-5% 
(C) 52.5% 
(d) 44.5% 
17. 
A gas mixture consists of 3 kg of 02 , 5 kg 
of N2  and 12 kg of CH4. The mass 
fraction and mole fraction of 02  are 
 0-25 and 0-125 
 0-15 and 0-092 
 0-25 and 0.092 
 0-15 and 0-125 
18. An insulated pipe of 50 mm outside 
diameter with c = 0 8 is laid in a room 
at 30 °C. If the surface temperature is 
250 °C and the convective heat transfer 
coefficient is 10 W/m 2  K, the total heat 
loss per unit length of the pipe will be 
 896-6 W/m 
 818-8 W/m 
 786-4 W/m 
 742-2 W/m 
VBY-S-MCH/50A 	 4 
19. A wire of 8 mm diameter at a 
temperature of 60 °C is to be insulated 
by a material having k = 174 W/m K. 
The heat transfer coefficient on the 
outside ha  = 8 W /m 2  K and ambient 
temperature Ta  = 25 °C. The maximum 
thickness of insulation for maximum 
heat loss will be 
(a) 15.25 mm 
04 
16.50 mm 
(0 
17-75 mm 
(d) 18.25 mm 
20. In liquid metals, thermal boundary layer 
develops much faster than velocity 
boundary layer due to 
lower value of Nusselt number 
higher value of Prandtl number 
lower value of Prandtl number 
higher value of Nusselt number 
21. The temperature of a body of area 01 m2  
is 900 K. The wavelength for maximum 
monochromatic emissive power will be 
nearly 
2-3 p.m 
3.2 pm 
4-1 pm 
5-0 gm  
22. Consider the following statements : 
For the laminar condensation on a 
vertical plate, the Nusselt theory says 
that 
inertia force in the film is negligible 
compared to viscosity and weight 
heat flow is mainly by conduction 
through the liquid film, convection 
in liquid film as well as in vapour is 
neglected 
velocity of vapour is very high 
Which of the above statements are 
correct? 
1, 2 and 3 
1 and 2 only 
1 and 3 only 
2 and 3 only 
23. In transition boiling, heat flux decreases 
due to which of the following? 
Low value of film heat transfer 
coefficient at the surface during 
100°C to 120°C surface 
temperature 
Major portion of heater surface is 
covered by vapour film which has 
smaller thermal conductivity as 
compared to liquid 
Nucleate boiling occurs very fast 
Select the correct answer using the code 
given below. 
1 only 
2 only 
3 only 
1, 2 and 3 
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