Exam Details
| Subject | ||
| Paper | ||
| Exam / Course | mains | |
| Department | ||
| Organization | Haryana Public Service Commission | |
| Position | mechanical engineering | |
| Exam Date | 2010 | |
| City, State | haryana, |
Question Paper
Code 15
MECHANICAL ENGINEERING
Time: 3 Hours
Maximum Marks: 150 Note Attempt Five questions in all. All question carry equal marks. Question No.1 is compulsory. Answer Two question from Part-I and Two question from Part-II. The parts of the same question must be answered together and must not be interposed between answers to other questions.
1.Write critical notes on any of Four of the following: (4X 7Y2 30)
Linear vibration analysis ofmechanical systems
Use ofpowder metallurgy
ApplicationofEnterpriseresourceplannmg in manufacturing.
Clapeyron Equation and its application in mechanical engineering
Discuss the advantages and disadvantages 0f using LPG in S.I. engines
Preventive maintenance in power plant
PART-I
2. Mention three possible causes of trouble in case of a centrifugal pump if
. No water is delivered, and
Pump absorbs higher power
..
List the various refrigeration and
controls and their functions.
3.. fa) Defil1e their.app.lic.ation in mechanical • • • .. o.
engmeenng:
Kinematic chain
Mechanism
Distinguishbetweenthefunctions offlywheel and Governor Classify various advantages ofpowered metallurgy process in
terms ofEconomic and capability ofthe process and C-09/M-15 1 PTO.
properties ofthe parts made.
Withthehelp ofquantitycostcurve,writethesignificance of Economic Order Quantity What are the limitations of
using basic EOQ model? PART -II
5. A mild steel shaft of 60mm diameter is subjected to a bending moment of 1.5kN-m and torque 1. If the yield
point of steel in tension is 21 OMPa, find the maximum value of the torque without causing yielding of the shaft material according to
Maximum shear stress theory
Maximum principal stress theory
What is critical path? Why it is ofhigh importance in large project scheduling and control? Due you see any project situation in which critical path can be changed?
6. Ahigh speed steel tool is used for turning operation. The tool life is 1 hI. when turning is carried at 30 m/min. The tool life will be reduced to 2.0 min if the cutting speed is doubled. Find the suitable speed in RPM for turning 300 mm diameter so that tool life is 30 minute.
Explain the mechanism of formation of NOx in an SI engine. Discuss the effect of
Compression ratio
Air-fuel-ratio" .
7. Discuss the need of governing of stearn turbine. With the help of a sketch, discuss the working principal of hydro-mechanical speed governing loop.
Discuss the factors affecting stage pressure ratio in an axial flow compressor. Draw the velocity distribution through a blade
(15)passage.
2
C-09/M-15
MECHANICAL ENGINEERING
Time: 3 Hours
Maximum Marks: 150 Note Attempt Five questions in all. All question carry equal marks. Question No.1 is compulsory. Answer Two question from Part-I and Two question from Part-II. The parts of the same question must be answered together and must not be interposed between answers to other questions.
1.Write critical notes on any of Four of the following: (4X 7Y2 30)
Linear vibration analysis ofmechanical systems
Use ofpowder metallurgy
ApplicationofEnterpriseresourceplannmg in manufacturing.
Clapeyron Equation and its application in mechanical engineering
Discuss the advantages and disadvantages 0f using LPG in S.I. engines
Preventive maintenance in power plant
PART-I
2. Mention three possible causes of trouble in case of a centrifugal pump if
. No water is delivered, and
Pump absorbs higher power
..
List the various refrigeration and
controls and their functions.
3.. fa) Defil1e their.app.lic.ation in mechanical • • • .. o.
engmeenng:
Kinematic chain
Mechanism
Distinguishbetweenthefunctions offlywheel and Governor Classify various advantages ofpowered metallurgy process in
terms ofEconomic and capability ofthe process and C-09/M-15 1 PTO.
properties ofthe parts made.
Withthehelp ofquantitycostcurve,writethesignificance of Economic Order Quantity What are the limitations of
using basic EOQ model? PART -II
5. A mild steel shaft of 60mm diameter is subjected to a bending moment of 1.5kN-m and torque 1. If the yield
point of steel in tension is 21 OMPa, find the maximum value of the torque without causing yielding of the shaft material according to
Maximum shear stress theory
Maximum principal stress theory
What is critical path? Why it is ofhigh importance in large project scheduling and control? Due you see any project situation in which critical path can be changed?
6. Ahigh speed steel tool is used for turning operation. The tool life is 1 hI. when turning is carried at 30 m/min. The tool life will be reduced to 2.0 min if the cutting speed is doubled. Find the suitable speed in RPM for turning 300 mm diameter so that tool life is 30 minute.
Explain the mechanism of formation of NOx in an SI engine. Discuss the effect of
Compression ratio
Air-fuel-ratio" .
7. Discuss the need of governing of stearn turbine. With the help of a sketch, discuss the working principal of hydro-mechanical speed governing loop.
Discuss the factors affecting stage pressure ratio in an axial flow compressor. Draw the velocity distribution through a blade
(15)passage.
2
C-09/M-15