Exam Details
| Subject | Mechanics Of Materials | |
| 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
1. Answer the following questions by choosing the best one out of the given four options:
Which of the following is a dimensionless quantity
Shear Stress
Bulk Modulus
Young's Modulus
Poisson's Ratio
The elastic constants G and K are related by the expression
E GK/2K+G
3GK/K+2G
9GK/3K+G
Two shafts of same length and material are joined in series. If the ratio of their diameters is then the ratio of their angles of twist will be
2
4
8
16
A thin cylindrical pressure vessel has been subjected to internal pressure. The ratio of longitudinal to hoop stress is
0·25
0·5
1·0
2·0
Modulus of Resilience of a material is
a measure of its elasticity
an index of its compressibility
a shock resisting property
the property to store energy without permanent deformation
Shear stresses on mutually perpendicular planes are
zero
equal
maximum
minimum
A steel wire x 10^11 of sectional area 5 x m^2 is to be extended to twice its initial length. To accomplish this task, the two ends of the wire should be pulled by a force of
10^7 N
10^9 N
1012 N
10^15 N
The safe stress for a hollow steel column which carries an axial load of 2·1 x 10^3 kN is 125 MN/m^2. If the external diameter of the column is 30 cm, determine the internal diameter.
Establish the relationship between the elastic constants of modulus of elasticity and modulus of rigidity.
A steel rod is 2 m long and 50 mm in diameter. An axial pull of 100 kN is suddenly applied to the rod. Calculate the instantaneous stress induced and also the instantaneous elongation produced in the rod. Take E =200 GN/m^2.
Under what conditions is 'toughness' important from the mechanical property considerations Also differentiate between resilience and proof resilience.
What are the assumptions made with the theory of simple bending? Also express the Flexural formula mentioning different terms of it.
A steel plate of width 120 mm and of. thickness 20 mm is bent into a circular arc of radius 10 m. Determine the maximum stress induced and the bending moment which will produce the maximum stress. Take E x 10^5 N/mm^2 .
Find out the expressions for circumferential and longitudinal stresses induced in a thin cylinder pressure vessel, under internal pressure, considering efficiency of circumferential and longitudinal joints.
A thin cylinder of internal diameter 1·25 m contains a fluid at an internal pressure of 2 N/mm^2. Determine the maximum thickness of the cylinder, if
the longitudinal stress is not to exceed 30N/mm^2,
the circumferential stress is not to exceed 45 N/mm^2.
Find out the crippling load of a column in the following cases:
Both ends hinged
Both ends fixed
A solid round bar of 3 m length and 5 cm in diameter is used as a column with one end fixed and the other end free. Determine the crippling load of the column. E =2·0 x 10^5 N/mm^2.
Derive the expression for finding out the shear stress produced in a circular shaft subjected to torsion.
A solid shaft of 150 mm diameter is used to transmit torque. Find the maximum torque transmitted by the shaft, if the maximum shear stress induced to the shaft is 45N/mm^2.
Which of the following is a dimensionless quantity
Shear Stress
Bulk Modulus
Young's Modulus
Poisson's Ratio
The elastic constants G and K are related by the expression
E GK/2K+G
3GK/K+2G
9GK/3K+G
Two shafts of same length and material are joined in series. If the ratio of their diameters is then the ratio of their angles of twist will be
2
4
8
16
A thin cylindrical pressure vessel has been subjected to internal pressure. The ratio of longitudinal to hoop stress is
0·25
0·5
1·0
2·0
Modulus of Resilience of a material is
a measure of its elasticity
an index of its compressibility
a shock resisting property
the property to store energy without permanent deformation
Shear stresses on mutually perpendicular planes are
zero
equal
maximum
minimum
A steel wire x 10^11 of sectional area 5 x m^2 is to be extended to twice its initial length. To accomplish this task, the two ends of the wire should be pulled by a force of
10^7 N
10^9 N
1012 N
10^15 N
The safe stress for a hollow steel column which carries an axial load of 2·1 x 10^3 kN is 125 MN/m^2. If the external diameter of the column is 30 cm, determine the internal diameter.
Establish the relationship between the elastic constants of modulus of elasticity and modulus of rigidity.
A steel rod is 2 m long and 50 mm in diameter. An axial pull of 100 kN is suddenly applied to the rod. Calculate the instantaneous stress induced and also the instantaneous elongation produced in the rod. Take E =200 GN/m^2.
Under what conditions is 'toughness' important from the mechanical property considerations Also differentiate between resilience and proof resilience.
What are the assumptions made with the theory of simple bending? Also express the Flexural formula mentioning different terms of it.
A steel plate of width 120 mm and of. thickness 20 mm is bent into a circular arc of radius 10 m. Determine the maximum stress induced and the bending moment which will produce the maximum stress. Take E x 10^5 N/mm^2 .
Find out the expressions for circumferential and longitudinal stresses induced in a thin cylinder pressure vessel, under internal pressure, considering efficiency of circumferential and longitudinal joints.
A thin cylinder of internal diameter 1·25 m contains a fluid at an internal pressure of 2 N/mm^2. Determine the maximum thickness of the cylinder, if
the longitudinal stress is not to exceed 30N/mm^2,
the circumferential stress is not to exceed 45 N/mm^2.
Find out the crippling load of a column in the following cases:
Both ends hinged
Both ends fixed
A solid round bar of 3 m length and 5 cm in diameter is used as a column with one end fixed and the other end free. Determine the crippling load of the column. E =2·0 x 10^5 N/mm^2.
Derive the expression for finding out the shear stress produced in a circular shaft subjected to torsion.
A solid shaft of 150 mm diameter is used to transmit torque. Find the maximum torque transmitted by the shaft, if the maximum shear stress induced to the shaft is 45N/mm^2.
Other Question Papers
Departments
- Centre for Corporate Education, Training & Consultancy (CCETC)
- Centre for Corporate Education, Training & Consultancy (CCETC)
- National Centre for Disability Studies (NCDS)
- School of Agriculture (SOA)
- School of Computer and Information Sciences (SOCIS)
- School of Continuing Education (SOCE)
- School of Education (SOE)
- School of Engineering & Technology (SOET)
- School of Extension and Development Studies (SOEDS)
- School of Foreign Languages (SOFL)
- School of Gender Development Studies(SOGDS)
- School of Health Science (SOHS)
- School of Humanities (SOH)
- School of Interdisciplinary and Trans-Disciplinary Studies (SOITDS)
- School of Journalism and New Media Studies (SOJNMS)
- School of Law (SOL)
- School of Management Studies (SOMS)
- School of Performing Arts and Visual Arts (SOPVA)
- School of Performing Arts and Visual Arts(SOPVA)
- School of Sciences (SOS)
- School of Social Sciences (SOSS)
- School of Social Work (SOSW)
- School of Tourism & Hospitality Service Sectoral SOMS (SOTHSM)
- School of Tourism &Hospitality Service Sectoral SOMS (SOTHSSM)
- School of Translation Studies and Training (SOTST)
- School of Vocational Education and Training (SOVET)
- Staff Training & Research in Distance Education (STRIDE)
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.