College of Engineering
Department: Mechanical Engineering
Questions bank pertaining to the basic concepts of ME 243-221: Dynamics of Machines
BC1: Understanding the concept of Simple mechanisms, pairs, and links
BC1_Q1: Match
the words with their definitions
Higher pair
Lower Pair
Machine
When pairs have point or line contact
It is a mechanism or combination of mechanisms which apart from transmitting motions
transfers mechanical power from one place to other
Pairs having surface contact.
BC1_Q1_ans
Higher pair
Machine
Lower Pair
When pairs have point or line contact
It is a mechanism or combination of mechanisms which apart from transmitting motions
transfers mechanical power from one place to other
Pairs having surface contact.
BC1_Q2: Match
the words with their definitions F= 3(n-1)-2P1-P2
n
Pairs with one degree of freedom
Number of links
Pairs with 2 degree of freedom
BC1_Q2_Ans: Match
P1
n
P2
P1
P2
the words with their definitions F= 3(n-1)-2P1-P2
n
Pairs with one degree of freedom
Number of links
Pairs with 2 degree of freedom
P1
BC: basic concept
BC_Q: Question related to basic concept
BC_Q_ans: answer of the question of the basic concept
P2
College of Engineering
Department: Mechanical Engineering
Questions bank pertaining to the basic concepts of ME 243-221: Dynamics of Machines
BC1_Q3: State whether or not the following statement is true or false for a crank and slider
mechanism as shown below
O True
O False
Number of links are 4
BC1_Q3_ Ans: State whether or not the following statement is true or false for a crank and slider
mechanism as shown below
O True
Fixed, crank, Con
Rod, and Slider
Number of links are 4
BC2: Understanding the concept related to grubler’s Degree of freedom and
grashof’s criterion.
BC2_Q1: What
F=0
is the degree of freedom for the mechanism given under
F=1
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BC_Q: Question related to basic concept
BC_Q_ans: answer of the question of the basic concept
F=2
College of Engineering
Department: Mechanical Engineering
Questions bank pertaining to the basic concepts of ME 243-221: Dynamics of Machines
BC2_Q1_Ans: What
F=0
is the degree of freedom for the mechanism given under
F=1
F=2
F=1
(n=8,
P1= 10
P2=0)
BC2_Q2: Match
the words with their definitions
Crank Crank Mechanism
Crank and slider mechanism
Double Rocker mechanism
If the sum of length of shortest link and longest link in four bar mechanism is <= the sum
of length of two other links and shortest link is fixed
If the sum of length of shortest link and longest link in four bar mechanism is <= the sum
of length of two other links and link adjacent to shortest link is fixed.
If the sum of length of shortest link and longest link in four bar mechanism is <= the sum
of length of two other links and link opposite to shortest link is fixed.
BC: basic concept
BC_Q: Question related to basic concept
BC_Q_ans: answer of the question of the basic concept
College of Engineering
Department: Mechanical Engineering
Questions bank pertaining to the basic concepts of ME 243-221: Dynamics of Machines
BC2_Q2_ans
Double Crank Mechanism
Crank and Rocker mechanism
Double Rocker mechanism
If the sum of length of shortest link and longest link in four bar mechanism is <= the
sum of length of two other links and shortest link is fixed
Crank and Rocker If the sum of length of shortest link and longest link in four bar mechanism is <= the
mechanism
sum of length of two other links and link adjacent to shortest link is fixed.
Double Rocker
If the sum of length of shortest link and longest link in four bar mechanism is <= the
mechanism
sum of length of two other links and link opposite to shortest link is fixed.
Double Crank
Mechanism
BC3: Understanding the concept related to velocity and acceleration in Mechanisms
BC3_Q1: For the crank and slider mechanism given what is the velocity of Slider. Given O1A = 150 mm,
Connecting rod AB= 600 mm, = 600 and. The crank O1A is rotating at a constant angular velocity of 10 π
rad/seconds clockwise.
VB= 4.02 m/seconds
O True
VB= 4.60 m/seconds
O False
VB= 10 m/s
A
O1

BC: basic concept
BC_Q: Question related to basic concept
BC_Q_ans: answer of the question of the basic concept
B
College of Engineering
Department: Mechanical Engineering
Questions bank pertaining to the basic concepts of ME 243-221: Dynamics of Machines
BC3_Q1_ Ans: For the crank and slider mechanism given what is the velocity of Slider. Given O1A = 150 mm,
Connecting rod AB= 600 mm, = 600 and. The crank O1A is rotating at a constant angular velocity of 10 π
rad/seconds clockwise.
VB= 4.02 m/seconds
VB= 4.60 m/seconds
VB = 4.60 m/sec
A
O1
BC3_Q2: Consider
VB= 10 m/s

B
the figures below. The velocity of C is given by? If angular velocity of
link AB is  rad/sec in clock wise direction.
Vc = VB x ( CD / AB)
Vc = VB x ( OC / OB)
Vc = VB x ( OC / AB)
O
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BC_Q: Question related to basic concept
BC_Q_ans: answer of the question of the basic concept
College of Engineering
Department: Mechanical Engineering
Questions bank pertaining to the basic concepts of ME 243-221: Dynamics of Machines
BC3_Q2_Ans: Consider
the figures below. The velocity of C is given by? If angular velocity
of link AB is  rad/sec in clock wise direction.
Vc = VB x ( CD / AB)
Vc = VB x ( OC / OB)
Vc = VB x ( OC / AB)
O
Vc = VB x ( OC / OB)
BC: basic concept
BC_Q: Question related to basic concept
BC_Q_ans: answer of the question of the basic concept
College of Engineering
Department: Mechanical Engineering
Questions bank pertaining to the basic concepts of ME 243-221: Dynamics of Machines
BC3_Q3: Consider
the figures below. Calculate the velocities of C (Vc),Velocity of E(Ve),
Velocity of D (Vd) and velocity of P (VP)? If link AB rotates at 200 rpm
(Vc, Ve, Vd, Vp )=
(242.5,100, 235, 30) cms/sec
(Vc, Ve, Vd, Vp )=
(242.5,100, 30, 235) cms/sec
(Vc, Ve, Vd, Vp )= (225,100,
135, 30) cms/sec
BC3_Q3_Ans: Consider
the figures below. Calculate the velocities of C (Vc),Velocity of
E(Ve), Velocity of D (Vd) and velocity of P (VP)? If link AB rotates at 200 rpm
(Vc, Ve, Vd, Vp )=
(242.5,100, 235, 30) cms/sec
(Vc, Ve, Vd, Vp )=
(242.5,100, 30, 235) cms/sec
Ans: (Vc, Ve, Vd, Vp )=
(242.5,100, 235, 30) cms/sec
BC: basic concept
BC_Q: Question related to basic concept
BC_Q_ans: answer of the question of the basic concept
(Vc, Ve, Vd, Vp )= (225,100,
135, 30) cms/sec
College of Engineering
Department: Mechanical Engineering
Questions bank pertaining to the basic concepts of ME 243-221: Dynamics of Machines
BC4: Understanding the concept related to acceleration and corriolis in Mechanisms
BC43_Q1: For
the quick return mechanism given below, Find the correct equation of
acceleration . The A2 is point on link 2 and A4 is point on link 4. The crank is rotating at
const. angular velocity 2 radian per second in the CW direction
AnA2 = AnA4 + AtA4 + AtA2A4+
24*V A2A4
AnA2 + AtA2= AnA4 + AtA4 +
AtA2A4+ 24*V A2A4
AnA2 + AtA2= AnA4 + AtA4 +
AtA2A4+ 22*V A2A4
A2, A4
Link 4
Link 2
BC4_Q1_: For
the quick return mechanism given below, Find the correct equation of
acceleration . The A2 is point on link 2 and A4 is point on link 4. The crank is rotating at
const. angular velocity 2 radian per second in the CW direction
AnA2 = AnA4 + AtA4 + AtA2A4+
24*V A2A4
AnA2 + AtA2= AnA4 + AtA4 +
AtA2A4+ 24*V A2A4
AnA2 + AtA2= AnA4 + AtA4 +
AtA2A4+ 22*V A2A4
AnA2 = AnA4 + AtA4 + AtA2A4+
24*V A2A4
A2, A4
Link 4
Link 2
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BC_Q: Question related to basic concept
BC_Q_ans: answer of the question of the basic concept
College of Engineering
Department: Mechanical Engineering
Questions bank pertaining to the basic concepts of ME 243-221: Dynamics of Machines
BC: basic concept
BC_Q: Question related to basic concept
BC_Q_ans: answer of the question of the basic concept