MEC GATE MCQ set 1

MEC GATE MCQ set 1

1. The unit of force in S.I. units is
(a) kilogram 
(b) newton
(c) watt
(d) dyne
(e) joule.
Ans:b

 2. The unit of work or energy in S.I. units is
(A) newton 
(b) pascal
(c) kilogram meter
(d) watt
(e) joule.
Ans:e

 3. The unit of power in S.I. units is
(a) newton meter 
(b) watt
(c) joule
(d) kilogram meter/sec.
(e) pascal per sec.
Ans:b

 4. Forces are called concurrent when their lines of action meet in
(a) one point 
(b) two points
(c) plane
(d) perpendicular planes
(e) different planes.
Ans: a

 5. Forces are called coplanar when all of them acting on body lie in
(a) one point 
(b) one plane
(c) different planes
(d) perpendicular planes
(e) different points.
Ans:b

 6. A force acting on a body may
(a) introduce internal stresses 
(b) balance the other forces acting on it
(c) retard its motion
(d) change its motion 
(e) all of the above.
Ans:e

 7. Which is the correct statement about law of polygon of forces ?
(a) if any number of forces acting at a point can be represented by the sides of a polygon taken in order, then the forces are in equilibrium 
(b) if any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon, then the forces are in equilibrium
(c) if a polygon representing forces acting at a point is closed then forces are in equilibrium
(d) if any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon taken in order, then the forces are in equilibrium
(e) none of the above.
Ans:d

 8. Effect of a force on a body depends upon
(a) magnitude 
(b) direction
(c) position or line of action
(d) all of the above
(e) none of the above.
Ans:d

 9. If a number of forces act simultaneously on a particle, it is possible
(a) not a replace them by a single force 
(b) to replace them by a single force
(c) to replace them by a single force through C.G.
(d) to replace them by a couple
(e) to replace them by a couple and a force.
Ans:b

 10. A force is completely defined when we specify
(a) magnitude 
(b) direction
(c) point of application
(d) all of the above
(e) none of the above.
Ans:d

 12. If two equal forces of magnitude P act at an angle 9°, their resultant will be
(a) P/2 cos 9/2 
(b) IP sin 9/2
(c) 2P tan 9/2
(d) IP cos 9/2
(e) Psin 9/2.
Ans:d

 13. The algebraic sum of the resolved parts of a number of forces in a given direction is equal to the resolved part of their resultant in the same direction. This is as per the principle of
(a) forces 
(b) independence of forces
(c) dependence of forces
(d) balance of force
(e) resolution of forces.
Ans:e

 14. The resolved part of the resultant of two forces inclined at an angle 9 in a given direction is equal to
(a) the algebraic sum of the resolved parts of the forces in the given direction 
(b) the sum of the resolved parts of the forces in the given direction
(c) the difference of the forces multiplied by the cosine of 9
(d) the sum of the forces multiplied by the sine of 9
(e) the sum of the forces multiplied by the tangent of 9.
Ans: a

 15. Which of the following do not have identical dimensions ?
(a) Momentum and impulse 
(b) Torque and energy
(c) Torque and work
(d) Kinetic energy and potential energy
(e) Moment of a force and angular momentum.
Ans:e

 16. Which of the following is not the unit of distance ?
(a) angstrom 
(b) light year
(c) micron
(d) millimetre
(e) milestone.
Ans:e

 17. Which of the following is not the unit of power ? 
(a) kW (kilowatt) 
(b) hp (horse power)
(c) kcal/sec
(d) kg m/sec
(e) kcal/kg sec.
Ans:e

 18. Which of the following is not the unit of work, energy and heat ?
(a) kcal 
(b) kg m
(c) kWhr
(d) hp
(e) hp hr.
Ans:d

 19. Which of the following is not the unit of pressure ?
(a) kg/cm 
(b) ata
(c) atmosphere
(d) mm of wcl
(e) newton.
Ans:e

 20. The weight of a body is due to
(a) centripetal force of earth 
(b) gravitational pull exerted by the earth
(c) forces experienced by body in atmosphere
(d) force of attraction experienced by particles
(e) gravitational force of attraction towards the center of the earth.
Ans:e


Comments

Post a Comment

Popular posts from this blog

MEC 107 MCQ 3

Mechanics Pratice paper 3 21)   Which axial force is determined while analyzing a truss?  a.  compressive force b.  tensile force c.  both a. and b. d.  none of the above ANSWER: both a. and b. 22)   If a body is subjected to plastic impact, _______ a.  only kinetic energy is conserved b.  only momentum is conserved c.  both a. and b. d.  none of the above 23)   An object of 30 kg is moved with a velocity of 2 m/s on a horizontal smooth surface. What is the velocity of the block for 4 seconds if force of 40 N is applied on it in the direction of force? a.  2 m/s b.  4.6 m/s c.  7.33 m/s d.  9.33 m/s ANSWER: 7.33 m/s 24)   If two objects of 30 kg and 10 kg move with equal kinetic energy, then what is the ratio of magnitudes for linear momentum?  a.  √3 : 1 b.  1 : √3 ...
Read more

MEC 107 MCQ 7

Image
Mechanics Practice paper 5 41)   Identify the type of truss shown below. a.  Deficient truss  b.  Perfect truss c.  Redundant truss d.  All of the above 42)   Which of the following statements is false about frame/truss? a.  Bent member is never used in a truss b.  Internal hinges are used to connect members in a truss  c.  All members in the truss are two force members d.  Multiforce members can be used in a frame 43)   Which motion has magnitude of static frictional force directly proportional to normal reaction? a.  Actual motion b.  Impending motion  c.  Both a. and b. d.  None of the above 44)   Which formula is used to calculate angle of static friction (Φ s )? a.  tan -1  μ s   b.  sin -1  μ s c.  cos -1  μ s d.  none of the above 45) ...
Read more