1. Important points:
• The angle made by the shear plane with the cutting speed vector
is called shear angle
• Higher the shear angle, better is the cutting performance
• Higher is the rake angles give rise to higher shear angles
• Single point tools
Used for turning, boring, shaping, and planning
• Multiple cutting edge tools
Used for drilling, reaming, tapping, milling, broaching, and sawing
Answer:
A
3. In a mechanisms, the number of instantaneous centers is given by the relations is Where n=no. of links
A. N=n(n-1)/2
B. N=n(n+1)/2
C. N=n(n-1)/4
D. N=n(n+1)/4
Answer:
A
4. Which of the following statements is correct related to Kennedy theorem?
A. If three plane bodies have relative motion among themselves, their I-centres must lie on a straight line.
B. If three plane bodies have relative motion among themselves, their I-centres must lie on a parabolic curve.
C. If three plane bodies have relative motion among themselves, their I-centres must lie on an ellipse.
D. None
Answer:
A
5. Mixture of ice and water form a
A. closed system
B. open system
C. isolated system
D. heterogeneous system
Answer:
D
6. The specific heat of air increases with increase in
A. temperature
B.Pressure
C. both pressure and temperature
D. air flow
Answer:
A
7. Which of the following materials is most elastic?
A. Rubber
B. Plastic
C. Brass
D. Steel
Answer:
D
8. Which of the following quantities is not the property of the system?
A. pressure
B. temperature
C. specific volume
D. heat
E. density
Answer:
D
9. The example of lower pair is
A. shaft revolving in a bearing
B. straight line motion mechanisms
C. automobile steering gear
D. all of the above
Answer:
D
10. Pulley in a belt drive acts as
A. cylindrical pair
B. turning pair
C. rolling pair
D. sliding pair
E. surface pair
Answer:
C
11. Any point on a link connecting double slider crank chain will trace a
A. straight line
B. circle
C. ellipse
D. parabola
Answer:
C
12. The example of spherical pair is
A. bolt and nut
B. lead screw of a lathe
C. ball and socket joint
D. ball bearing and roller bearing
Answer:
C
13. In a Carnot cycle, heat is transferred at
A. constant pressure
B. constant volume
C. constant temperature
D. constant enthalpy
Answer:
C
14. Name the property of a material which enables it to resist fracture due to high impact loads is known as
A. Elasticity
B. Endurance
C. Strength
D. Toughness
Answer:
D
15. The maximum degree of freedom in space is
A. 6
B. 5
C. 8
D. 3
Answer:
6
16. For reversible adiabatic process, change in entropy is
A. maximum
B. minimum
C. zero
D. unpredictable
E. negative
Answer:
C
17. The example of rolling pair is
A. bolt and nut
B. lead screw of a lathe
C. ball and socket joint
D. ball bearing and roller bearing
Answer:
D
18. in a free expansion process
A. work done is zero
B. heat transfer is zero
C. both (A) and (B)
D. work done is zero but heat increases
E. work done is zero but heat decreases.
Answer:
C
19. The number of links in a planar mechanism with revolute joints having 10 instantaneous centres is
A. 5
B. 4
C. 6
D. None
Answer:
A
20. The relationship between the number of pairs (p) and the number of links (l) is
a. l = 2p – 3
b. l = 2p – 5
c. l = 2p – 2
d. l = 2p – 4
Answer:
D
http://www.mediafire.com/view/t3ee3kde3s69oah/MECHANICAL%20OBJECTIVE%20QUESTIONS-2.docx
• The angle made by the shear plane with the cutting speed vector
is called shear angle• Higher the shear angle, better is the cutting performance
• Higher is the rake angles give rise to higher shear angles
• Single point tools
Used for turning, boring, shaping, and planning
• Multiple cutting edge tools
Used for drilling, reaming, tapping, milling, broaching, and sawing
Answer:
A
3. In a mechanisms, the number of instantaneous centers is given by the relations is Where n=no. of links
A. N=n(n-1)/2
B. N=n(n+1)/2
C. N=n(n-1)/4
D. N=n(n+1)/4
Answer:
A
4. Which of the following statements is correct related to Kennedy theorem?
A. If three plane bodies have relative motion among themselves, their I-centres must lie on a straight line.
B. If three plane bodies have relative motion among themselves, their I-centres must lie on a parabolic curve.
C. If three plane bodies have relative motion among themselves, their I-centres must lie on an ellipse.
D. None
Answer:
A
5. Mixture of ice and water form a
A. closed system
B. open system
C. isolated system
D. heterogeneous system
Answer:
D
6. The specific heat of air increases with increase in
A. temperature
B.Pressure
C. both pressure and temperature
D. air flow
Answer:
A
7. Which of the following materials is most elastic?
A. Rubber
B. Plastic
C. Brass
D. Steel
Answer:
D
8. Which of the following quantities is not the property of the system?
A. pressure
B. temperature
C. specific volume
D. heat
E. density
Answer:
D
9. The example of lower pair is
A. shaft revolving in a bearing
B. straight line motion mechanisms
C. automobile steering gear
D. all of the above
Answer:
D
10. Pulley in a belt drive acts as
A. cylindrical pair
B. turning pair
C. rolling pair
D. sliding pair
E. surface pair
Answer:
C
11. Any point on a link connecting double slider crank chain will trace a
A. straight line
B. circle
C. ellipse
D. parabola
Answer:
C
12. The example of spherical pair is
A. bolt and nut
B. lead screw of a lathe
C. ball and socket joint
D. ball bearing and roller bearing
Answer:
C
13. In a Carnot cycle, heat is transferred at
A. constant pressure
B. constant volume
C. constant temperature
D. constant enthalpy
Answer:
C
14. Name the property of a material which enables it to resist fracture due to high impact loads is known as
A. Elasticity
B. Endurance
C. Strength
D. Toughness
Answer:
D
15. The maximum degree of freedom in space is
A. 6
B. 5
C. 8
D. 3
Answer:
6
16. For reversible adiabatic process, change in entropy is
A. maximum
B. minimum
C. zero
D. unpredictable
E. negative
Answer:
C
17. The example of rolling pair is
A. bolt and nut
B. lead screw of a lathe
C. ball and socket joint
D. ball bearing and roller bearing
Answer:
D
18. in a free expansion process
A. work done is zero
B. heat transfer is zero
C. both (A) and (B)
D. work done is zero but heat increases
E. work done is zero but heat decreases.
Answer:
C
19. The number of links in a planar mechanism with revolute joints having 10 instantaneous centres is
A. 5
B. 4
C. 6
D. None
Answer:
A
20. The relationship between the number of pairs (p) and the number of links (l) is
a. l = 2p – 3
b. l = 2p – 5
c. l = 2p – 2
d. l = 2p – 4
Answer:
D
http://www.mediafire.com/view/t3ee3kde3s69oah/MECHANICAL%20OBJECTIVE%20QUESTIONS-2.docx
0 Comments