Exam Details
| Subject | I.C. Engines | |
| Paper | ||
| Exam / Course | Diploma in Mechanical Engineering (DMEVI)& B.Tech. MECHANICAL ENGINEERING 1-4 (BTMEVI) | |
| Department | School of Engineering & Technology (SOET) | |
| Organization | indira gandhi national open university | |
| Position | ||
| Exam Date | December, 2016 | |
| City, State | new delhi, |
Question Paper
No. of Printed Pages: 4 IBIMEE..0311
DIPLOMA -VIEP -MECHANICAL
ENGINEERING (DMEVI)
Term-End Examination
December, 2016
BIMEE-031 I.e. ENGINES
Time hours Maximum Marks: 70
.Note: Question no. 1 is compulsory. Attempt five questions in all. All questions carry equal marks. Use of scientific calculator is permitted.
1. Choose the correct answer from the given four alternatives: 7x2=14
In S.I. engines, the throttle valve of carburettor controls the quantity of
Fuel
Air
Fuel and air mixture
Lubricating oil
An engine operates between temperature limits 900 K and T2 and another between T2 and 400 K For both engines to be equally efficient, T2 should be
600 K
700 K
625 K
650 K
A heat engine develops 60 kW work having an efficiency of 60%. The amount of heat rejected will be
400kW
10 kW
40 kW
20 kW
In Carnot cycle, addition and rejection of heat takes place at
constant pressure
constant temperature
constant volume
constant speed
If the compression ratio is increased in an S.I. engine, the knocking tendency will
increase
decrease
not be affected
cannot be predicted
Anti-knock property of a C.I. engine fuel can be improved by adding
Tetra-ethyl lead
Amyl nitrate
Hexadecane
Trimethyle pentane
Carbon deposit on the cylinder head of an I.C. engine tends to increase
clearance volume
compression ratio
swept volume
None of the above
2. "In agriculture field, it is better to use C.I. engines than S.I. engines." Justify this statement.
Explain the phenomenon of auto-ignition. Explain how auto-ignition is responsible for knocking in S.I engines. 7+7
3. "Supercharging is preferred in diesel engines than petrol engines." Justify the statement.
What is the reason that two-stroke engines are not· used in cars even though they develop theoretically twice the power than that of four-stroke engines? 7+7
4. Discuss with suitable sketches the magneto-ignition systems used in petrol engines.
The efficiency of an Otto cycle is 60% and y 1.5. What is the compression ratio? 7+7
5. Describe briefly the multipoint fuel injection system.
Explain briefly the various sources from which pollutants are emitted from S.I engines. 7+7
6. "Compressed Natural Gas is preferable in S.I engines than CJ. engines." Justify this statement.
Why are there lubrication and cooling systems in an engine? Discuss briefly. 7+7
DIPLOMA -VIEP -MECHANICAL
ENGINEERING (DMEVI)
Term-End Examination
December, 2016
BIMEE-031 I.e. ENGINES
Time hours Maximum Marks: 70
.Note: Question no. 1 is compulsory. Attempt five questions in all. All questions carry equal marks. Use of scientific calculator is permitted.
1. Choose the correct answer from the given four alternatives: 7x2=14
In S.I. engines, the throttle valve of carburettor controls the quantity of
Fuel
Air
Fuel and air mixture
Lubricating oil
An engine operates between temperature limits 900 K and T2 and another between T2 and 400 K For both engines to be equally efficient, T2 should be
600 K
700 K
625 K
650 K
A heat engine develops 60 kW work having an efficiency of 60%. The amount of heat rejected will be
400kW
10 kW
40 kW
20 kW
In Carnot cycle, addition and rejection of heat takes place at
constant pressure
constant temperature
constant volume
constant speed
If the compression ratio is increased in an S.I. engine, the knocking tendency will
increase
decrease
not be affected
cannot be predicted
Anti-knock property of a C.I. engine fuel can be improved by adding
Tetra-ethyl lead
Amyl nitrate
Hexadecane
Trimethyle pentane
Carbon deposit on the cylinder head of an I.C. engine tends to increase
clearance volume
compression ratio
swept volume
None of the above
2. "In agriculture field, it is better to use C.I. engines than S.I. engines." Justify this statement.
Explain the phenomenon of auto-ignition. Explain how auto-ignition is responsible for knocking in S.I engines. 7+7
3. "Supercharging is preferred in diesel engines than petrol engines." Justify the statement.
What is the reason that two-stroke engines are not· used in cars even though they develop theoretically twice the power than that of four-stroke engines? 7+7
4. Discuss with suitable sketches the magneto-ignition systems used in petrol engines.
The efficiency of an Otto cycle is 60% and y 1.5. What is the compression ratio? 7+7
5. Describe briefly the multipoint fuel injection system.
Explain briefly the various sources from which pollutants are emitted from S.I engines. 7+7
6. "Compressed Natural Gas is preferable in S.I engines than CJ. engines." Justify this statement.
Why are there lubrication and cooling systems in an engine? Discuss briefly. 7+7
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Subjects
- Advanced Dynamics Of Machine
- Automobile Engineering
- Combustion Engineering
- Computer Aided Manufacturing
- Computing Aided Design
- Design of Machine Elements
- Engineering Metallurgy
- Engineering Thermodynamics
- Experimental Stress Analysis
- Finite Element Analysis
- Fluid Mechanics
- Heat And Mass Transfer
- Heat Transfer
- I.C. Engines
- Industrial Engineering
- Industrial Ergonomics
- Industrial Measurement And Quality Control
- Industrial Organization And Management
- Kinematics and Dynamics of Machines
- Machine Design - I
- Machine Design-Ii
- Machine Drawing
- Machines Tools
- Maintenance Engineering
- Material Science
- Materials Handling
- Mechanical System Design
- Mechanical Vibration
- Mechanics Of Materials
- Mechatronics
- Metrology
- Metrology And Quality Control
- Non-Conventional Energy Resources
- Non-Destructive Testing
- Nuclear Power Engineering
- Optimisation Techniques In Engineering
- Optimization For Engineering Design
- Power Plant Engineering
- Power Transmitting Elements
- Product Development And Design
- Production And Operations Management
- Production Technology - Ii
- Production Technology-I
- Refrigeration And Air Conditioning
- Refrigeration System
- Robotics
- Safety Engineering
- Technical Entrepreneurship
- Thermal Engineering
- Thermal Engineering - I
- Thermofluid Engineering
- Total Quality Management (Tqm)
- Tribology
- Turbo Machines
- Unconventional Manufacturing Processes
- Welding Engg.