Engineering Mechanics Objective Ques-Ans [Part-1]

Engineering Mechanics Objective Questions too Answers

1. According to regulation of conservation of energy, the full momentum of a organization of masses inwards whatever management remains constant unless acted upon past times an external forcefulness inwards that direction.
A.     True
B.     False 

Answer: Option B

2. The friction experienced past times a body, when inwards motion, is known as
A.     rolling friction
B.     dynamic friction
C.     limiting friction
D.     static friction

Answer: Option B

3. Two balls of equal volume too of perfectly elastic cloth are lying on the floor. One of the ball alongside velocity v is made to struck the 2nd ball. Both the balls afterward acquit upon volition displace alongside a velocity
A.     v
B.     v/2
C.     v/4
D.     v/8

Answer: Option B

4. The term 'force' may live defined every bit an agent which produces or tends to produce, destroys or tends to destroy motion.
A.     Agree
B.     Disagree

Answer: Option Influenza A virus subtype H5N1

5. The coefficient of restitution for elastic bodies is one.
A.     Correct
B.     Incorrect

Answer: Option B
Explanation:
Coefficient of restitution for elastic bodies is 0 - 1.
Coefficient of restitution for perfect elastic bodies is 1.

6. The velocity ratio inwards representative of an inclined bird inclined at angle θ to the horizontal too weight beingness pulled upwards the inclined bird past times vertical endeavour is
A.     sin θ
B.     cos θ
C.     tan θ
D.     cosec θ

Answer: Option A

7. The arrive at of projectile on a downward inclined bird is __________ the arrive at on upward inclined bird for the same velocity of projection too angle of projection.
A.     less than
B.     more than
C.     equal to

Answer: Option B

8. The angle of inclination of a vehicle when moving along a round out path __________ upon its mass.
A.     depends
B.     does non depend

Answer: Option B

 9. Influenza A virus subtype H5N1 torso of weight west is required to displace upwards on fossil oil inclined bird whose angle of inclination alongside the horizontal is α. The endeavour applied parallel to the bird is given by(where μ = tanφ = Coefficient of friction betwixt the bird too the body.)
A.     P = west tanα
B.     P = west tan(α + φ)
C.     P = west (sinα + μcosα)
D.     P = west (cosα + μsinα)

Answer: Option C

10. If the resultant of 2 equal forces has the same magnitude every bit either of the forces, too then the angle betwixt the 2 forces is
A.     30°
B.     60°
C.     90°
D.     120°

Answer: Option D

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