141 + Mcqs in Mechanisms and Machines Page 3 McqOptions

101.	Shaft with taper key is an example of
A.	incompletely constrained motion
B.	completely constrained motion
C.	successfully constrained motion
D.	all of the above
Answer» D. all of the above

Discussion

102.	According to D' Alembert's principle, the body is in equilibrium position if
A.	inertia force is applied in the direction opposite to the resultant force
B.	inertia force is applied in the same direction of the resultant force
C.	both a. and b.
D.	none of the above
Answer» B. inertia force is applied in the same direction of the resultant force

Discussion

103.	A connecting rod has periodic time of 1.5 sec/cycle for one oscillation. Calculate radius of gyration, when centre of gravity is at a distance of 500 mm from the small end.
A.	0.1325 m
B.	0.1719 m
C.	0.0295 m
D.	0.555 m
Answer» C. 0.0295 m

Discussion

104.	Which of the following condition is true for uniform wear theory?
A.	p = constant
B.	p/r = constant
C.	p.r = constant
D.	none of the above
Answer» D. none of the above

Discussion

105.	Which theory is used to determine safe design of bearings?
A.	Uniform wear theory
B.	Uniform pressure theory
C.	both a. and b.
D.	none of the above
Answer» C. both a. and b.

Discussion

106.	Frictional torque transmitted by uniform wear theory is more than torque transmitted by uniform pressure theory
A.	True
B.	False
Answer» C.

Discussion

107.	Double block brake is a type of
A.	Band brake
B.	Internal expanding shoe brake
C.	Shoe brake
D.	None of the above
Answer» D. None of the above

Discussion

108.	Which energy is absorbed by the brakes of an elevator during braking process?
A.	Potential energy
B.	Kinetic energy
C.	Both a. and b.
D.	None of the above
Answer» B. Kinetic energy

Discussion

109.	In single shoe brake, when is uniform normal pressure observed between block and drum?
A.	θ < 60o
B.	2θ < 90o
C.	2θ < 60o
D.	θ > 30o
Answer» B. 2θ < 90o

Discussion

110.	Which type of brakes have wooden blocks placed inside flexible steel band?
A.	Block brake
B.	Band brake
C.	Band and Block brake
D.	Pivoted block brake
Answer» D. Pivoted block brake

Discussion

111.	According to loop closure equation, in a closed loop mechanism the sum of relative position vectors for the links is
A.	less than 1
B.	zero
C.	greater than 1
D.	none of the above
Answer» C. greater than 1

Discussion

112.	Why is double Hooke's joint used?
A.	To obtain uniform velocity ratio
B.	To obtain variable velocity ratio
C.	Both a. and b.
D.	None of the above
Answer» B. To obtain variable velocity ratio

Discussion

113.	Which of the following kinematic pairs is classified depending upon the mechanical arrangement between the links?
A.	Primatic pair
B.	Revolute pair
C.	Force closed pair
D.	Sliding pair
Answer» D. Sliding pair

Discussion

114.	Which pairs are considered as higher pairs?
A.	When transmitting motion, two links have line or point contact between them
B.	When transmitting motion, two links have surface contact or line contact between them
Answer» B. When transmitting motion, two links have surface contact or line contact between them

Discussion

115.	Cam and follower is an example of
A.	force closed pair
B.	unclosed pair
C.	open pairs
D.	all of the above
Answer» E.

Discussion

116.	The equation j = (3/2)n – 2 represents relation between number of joints (L.H.S) and number of links (R.H.S). The chain is constrained if
A.	L.H.S = R.H.S
B.	L.H.S < R.H.S
C.	L.H.S > R.H.S
D.	None of the above
Answer» B. L.H.S < R.H.S

Discussion

117.	Trifilar suspension system is used to determine mass moment of inertia of
A.	disc
B.	flywheel
C.	both a. and b.
D.	none of the above
Answer» D. none of the above

Discussion

118.	The difference between which two factors denotes the correction couple?
A.	Difference between force required to accelerate non dynamically equivalent system and dynamically equivalent system
B.	Difference between torque required to accelerate non dynamically equivalent system and dynamically equivalent system
C.	Difference between torque required to decelerate dynamically equivalent system and non dynamically equivalent system
D.	none of the above
Answer» C. Difference between torque required to decelerate dynamically equivalent system and non dynamically equivalent system

Discussion

119.	On which factors does law of friction depend?
A.	Nature of material
B.	Area of contact between surfaces
C.	Velocity of sliding
D.	All of the above
Answer» B. Area of contact between surfaces

Discussion

120.	What are crank effort diagrams?
A.	Turning moment diagram is drawn on cartesian co-ordinates
B.	Turning moment diagram is drawn on polar co-ordinates
C.	Turning moment (T) is plotted against crank angle θ for various crank positions
D.	All of the above
Answer» D. All of the above

Discussion

121.	The internal and external diameter of a shaft are 300 mm and 500 mm respectively. Thrust pressure is 6 x 106 N/m2.Calculate the load on the shaft which is taken by 5 collars.
A.	3769.911 N
B.	15079.644 kN
C.	3769.911 kN
D.	15079.644 N
Answer» B. 15079.644 kN

Discussion

122.	Which of the following statements is/are true?
A.	Friction clutches give positive engagement
B.	Square shaped jaws in jaw clutch are driven in one direction
C.	Spiral shaped jaws in jaw clutch are driven in one direction
D.	All the above statements are true
Answer» D. All the above statements are true

Discussion

123.	Which clutch is known as wet clutch?
A.	Single plate clutch
B.	multi plate clutch
C.	both a. and b.
D.	none of the above
Answer» C. both a. and b.

Discussion

124.	In centrifugal clutches, when is the contact between shoe friction lining and surface of drum observed?
A.	When centrifugal force is less than spring force
B.	When centrifugal force is equal to spring force
C.	When centrifugal force is greater than spring force
D.	None of the above
Answer» C. When centrifugal force is greater than spring force

Discussion

125.	Calculate torque transmitted by the clutch having four shoes, which has spring force of 700 N and centrifugal force of 4000 N. Rim diameter is 560 mm and coefficient of friction is 0.3
A.	1100 N
B.	1000 N
C.	1579 N
D.	1108.8 N
Answer» E.

Discussion

126.	If brakes are applied on front wheels of a car and if it moves on a level road, then retardation of the car is calculated using the formula
A.	μ g
B.	[μ g (l-x)] / (l + μ h)
C.	(μ g x) / (l- μ h)
D.	none of the above
Answer» D. none of the above

Discussion

127.	Determine the power transmitted if dead weight on brake is 70 kg and engine has a speed of 300 rpm. One end of the rope has a diameter of 0.05 m is attached to a spring balance which has reading of 150 N, diameter of drum is 1 m.
A.	8.851 kW
B.	8.851 W
C.	1319.46 W
D.	none of the above
Answer» B. 8.851 W

Discussion

128.	Which parameters can be measured using a dynamometer?
A.	Force
B.	Torque
C.	Power
D.	All of the above
Answer» E.

Discussion

129.	Identify the type of absorption dynamometer ?
A.	Epicyclic dynamometer
B.	Prony brake dynamometer
C.	Torsion dynamometer
D.	Tatham dynamometer
Answer» C. Torsion dynamometer

Discussion

130.	Which of the following statements is/are false?
A.	To prevent heat generated due to friction, rope brake dynamometers are provided with cooling water
B.	Angle of twist upto 1/10 of degree can be measured by Glibson flash light torsion dynamometer
C.	In pneumatic brakes, the ratio between hydraulic pressure and air pressure is 15:1
D.	All the above statements are false
Answer» C. In pneumatic brakes, the ratio between hydraulic pressure and air pressure is 15:1

Discussion

131.	In a Hooke's joint, maximum velocity ratio between driving and driven shaft is possible if θ is
A.	0
B.	π
C.	2 π
D.	all of the above
Answer» E.

Discussion

132.	Which relation is used to denote condition for equal speeds, when driving and driven shafts are connected by Hook's joint?
A.	tan θ = ± √cos α
B.	tan θ = ± √cot α
C.	tan θ = ± √sin α
D.	cot θ = ± √cos α
Answer» B. tan θ = ± √cot α

Discussion

133.	Calculate the angular speed of driven shaft if the driving shaft has angular speed of 400 rpm. When shaft angle is 20o and angle of rotation is 40o in Hooke's joint.
A.	40.23 rad/s
B.	42.45 rad/s
C.	36.82 rad/s
D.	None of the above
Answer» C. 36.82 rad/s

Discussion

134.	Calculate the angle of driving shaft, if the two shafts of the Hooke's joint are inclined at an angle of 18.50o
A.	45.56o
B.	37.70o
C.	39.17o
D.	41.95o
Answer» E.

Discussion

135.	The relation between number of links and number of lower pairs is given as n = 2p – 4. If L.H.S is less than R.H.S of this equation then the chain is
A.	constrained
B.	locked
C.	structure
D.	unconstrained
Answer» E.

Discussion

136.	One quaternary joint is equal to how many binary joints?
A.	4
B.	3
C.	2
D.	none of the above
Answer» C. 2

Discussion

137.	Watt's mechanism is based on
A.	inversions of single slider chain mechanism
B.	inversions of double slider chain mechanism
C.	inversions of four bar chain mechanism
D.	inversions of five bar chain mechanism
Answer» D. inversions of five bar chain mechanism

Discussion

138.	Scotch yoke mechanism is the inversion of
A.	Single slider kinematic chain
B.	Double slider kinematic chain
C.	Four bar chain
D.	None of the above
Answer» C. Four bar chain

Discussion

139.	Calculate torque acting on the crank, if tangential force acting on the engine is 150 kN and 300 mm is the crank radius.
A.	45 kN.m
B.	500 kN/m
C.	2 kN/m
D.	2 kN/m
Answer» B. 500 kN/m

Discussion

140.	Calculate the thrust in connecting rod, if piston effort is 200 kN and crank makes an angle of 45o from TDC. Assume obliquity ratio = 3.5
A.	900.80 kN
B.	204.20 kN
C.	195.87 kN
D.	970.02 kN
Answer» C. 195.87 kN

Discussion

141.	Torsional pendulum is used to determine mass moment of inertia of
A.	flywheel
B.	rigid bar
C.	both a. and b
D.	none of the above
Answer» B. rigid bar

Discussion

Explore topic-wise MCQs in ENGINEERING SERVICES EXAMINATION (ESE).

Shaft&nbsp;with&nbsp;taper&nbsp;key&nbsp;is&nbsp;an&nbsp;example&nbsp;of&nbsp;

&nbsp;&nbsp;According&nbsp;to&nbsp;D&#39;&nbsp;Alembert&#39;s&nbsp;principle,&nbsp;the&nbsp;body&nbsp;is&nbsp;in&nbsp;equilibrium&nbsp;position&nbsp;if&nbsp;

Which&nbsp;of&nbsp;the&nbsp;following&nbsp;condition&nbsp;is&nbsp;true&nbsp;for&nbsp;uniform&nbsp;wear&nbsp;theory?&nbsp;

Which&nbsp;theory&nbsp;is&nbsp;used&nbsp;to&nbsp;determine&nbsp;safe&nbsp;design&nbsp;of&nbsp;bearings?&nbsp;

Frictional&nbsp;torque&nbsp;transmitted&nbsp;by&nbsp;uniform&nbsp;wear&nbsp;theory&nbsp;is&nbsp;more&nbsp;than&nbsp;torque&nbsp;transmitted&nbsp;by&nbsp;uniform&nbsp;pressure&nbsp;theory&nbsp;

Double&nbsp;block&nbsp;brake&nbsp;is&nbsp;a&nbsp;type&nbsp;of&nbsp;

Which&nbsp;energy&nbsp;is&nbsp;absorbed&nbsp;by&nbsp;the&nbsp;brakes&nbsp;of&nbsp;an&nbsp;elevator&nbsp;during&nbsp;braking&nbsp;process?&nbsp;

&nbsp;In&nbsp;single&nbsp;shoe&nbsp;brake,&nbsp;when&nbsp;is&nbsp;uniform&nbsp;normal&nbsp;pressure&nbsp;observed&nbsp;between&nbsp;block&nbsp;and&nbsp;drum?

Which&nbsp;type&nbsp;of&nbsp;brakes&nbsp;have&nbsp;wooden&nbsp;blocks&nbsp;placed&nbsp;inside&nbsp;flexible&nbsp;steel&nbsp;band?&nbsp;

According&nbsp;to&nbsp;loop&nbsp;closure&nbsp;equation,&nbsp;in&nbsp;a&nbsp;closed&nbsp;loop&nbsp;mechanism&nbsp;the&nbsp;sum&nbsp;of&nbsp;relative&nbsp;position&nbsp;vectors&nbsp;for&nbsp;the&nbsp;links&nbsp;is&nbsp;

Why&nbsp;is&nbsp;double&nbsp;Hooke&#39;s&nbsp;joint&nbsp;used?&nbsp;

&nbsp;Which&nbsp;of&nbsp;the&nbsp;following&nbsp;kinematic&nbsp;pairs&nbsp;is&nbsp;classified&nbsp;depending&nbsp;upon&nbsp;the&nbsp;mechanical&nbsp;arrangement&nbsp;between&nbsp;the&nbsp;links?&nbsp;

&nbsp;Which&nbsp;pairs&nbsp;are&nbsp;considered&nbsp;as&nbsp;higher&nbsp;pairs?&nbsp;

Cam&nbsp;and&nbsp;follower&nbsp;is&nbsp;an&nbsp;example&nbsp;of&nbsp;

The&nbsp;equation&nbsp;j&nbsp;=&nbsp;(3/2)n&nbsp;&ndash;&nbsp;2&nbsp;represents&nbsp;relation&nbsp;between&nbsp;number&nbsp;of&nbsp;joints&nbsp;(L.H.S)&nbsp;and&nbsp;number&nbsp;of&nbsp;links&nbsp;(R.H.S).&nbsp;The&nbsp;chain&nbsp;is&nbsp;constrained&nbsp;if&nbsp;

Trifilar&nbsp;suspension&nbsp;system&nbsp;is&nbsp;used&nbsp;to&nbsp;determine&nbsp;mass&nbsp;moment&nbsp;of&nbsp;inertia&nbsp;of&nbsp;

The&nbsp;difference&nbsp;between&nbsp;which&nbsp;two&nbsp;factors&nbsp;denotes&nbsp;the&nbsp;correction&nbsp;couple?&nbsp;

On&nbsp;which&nbsp;factors&nbsp;does&nbsp;law&nbsp;of&nbsp;friction&nbsp;depend?&nbsp;

What&nbsp;are&nbsp;crank&nbsp;effort&nbsp;diagrams?&nbsp;

Which&nbsp;of&nbsp;the&nbsp;following&nbsp;statements&nbsp;is/are&nbsp;true?&nbsp;

Which&nbsp;clutch&nbsp;is&nbsp;known&nbsp;as&nbsp;wet&nbsp;clutch?&nbsp;

In&nbsp;centrifugal&nbsp;clutches,&nbsp;when&nbsp;is&nbsp;the&nbsp;contact&nbsp;between&nbsp;shoe&nbsp;friction&nbsp;lining&nbsp;and&nbsp;surface&nbsp;of&nbsp;drum&nbsp;observed?&nbsp;

If&nbsp;brakes&nbsp;are&nbsp;applied&nbsp;on&nbsp;front&nbsp;wheels&nbsp;of&nbsp;a&nbsp;car&nbsp;and&nbsp;if&nbsp;it&nbsp;moves&nbsp;on&nbsp;a&nbsp;level&nbsp;road,&nbsp;then&nbsp;retardation&nbsp;of&nbsp;the&nbsp;car&nbsp;is&nbsp;calculated&nbsp;using&nbsp;the&nbsp;formula&nbsp;

Which&nbsp;parameters&nbsp;can&nbsp;be&nbsp;measured&nbsp;using&nbsp;a&nbsp;dynamometer?&nbsp;

Identify&nbsp;the&nbsp;type&nbsp;of&nbsp;absorption&nbsp;dynamometer&nbsp;?

Which&nbsp;of&nbsp;the&nbsp;following&nbsp;statements&nbsp;is/are&nbsp;false?&nbsp;

In&nbsp;a&nbsp;Hooke&#39;s&nbsp;joint,&nbsp;maximum&nbsp;velocity&nbsp;ratio&nbsp;between&nbsp;driving&nbsp;and&nbsp;driven&nbsp;shaft&nbsp;is&nbsp;possible&nbsp;if&nbsp;&theta;&nbsp;is

Which&nbsp;relation&nbsp;is&nbsp;used&nbsp;to&nbsp;denote&nbsp;condition&nbsp;for&nbsp;equal&nbsp;speeds,&nbsp;when&nbsp;driving&nbsp;and&nbsp;driven&nbsp;shafts&nbsp;are&nbsp;connected&nbsp;by&nbsp;Hook&#39;s&nbsp;joint?

&nbsp;Calculate&nbsp;the&nbsp;angle&nbsp;of&nbsp;driving&nbsp;shaft,&nbsp;if&nbsp;the&nbsp;two&nbsp;shafts&nbsp;of&nbsp;the&nbsp;Hooke&#39;s&nbsp;joint&nbsp;are&nbsp;inclined&nbsp;at&nbsp;an&nbsp;angle&nbsp;of&nbsp;18.50o&nbsp;

&nbsp;One&nbsp;quaternary&nbsp;joint&nbsp;is&nbsp;equal&nbsp;to&nbsp;how&nbsp;many&nbsp;binary&nbsp;joints?&nbsp;

Watt&#39;s&nbsp;mechanism&nbsp;is&nbsp;based&nbsp;on&nbsp;

Scotch&nbsp;yoke&nbsp;mechanism&nbsp;is&nbsp;the&nbsp;inversion&nbsp;of&nbsp;

Calculate&nbsp;torque&nbsp;acting&nbsp;on&nbsp;the&nbsp;crank,&nbsp;if&nbsp;tangential&nbsp;force&nbsp;acting&nbsp;on&nbsp;the&nbsp;engine&nbsp;is&nbsp;150&nbsp;kN&nbsp;and&nbsp;300&nbsp;mm&nbsp;is&nbsp;the&nbsp;crank&nbsp;radius.&nbsp;

Calculate&nbsp;the&nbsp;thrust&nbsp;in&nbsp;connecting&nbsp;rod,&nbsp;if&nbsp;piston&nbsp;effort&nbsp;is&nbsp;200&nbsp;kN&nbsp;and&nbsp;crank&nbsp;makes&nbsp;an&nbsp;angle&nbsp;of&nbsp;45o&nbsp;from&nbsp;TDC.&nbsp;Assume&nbsp;obliquity&nbsp;ratio&nbsp;=&nbsp;3.5&nbsp;

Torsional&nbsp;pendulum&nbsp;is&nbsp;used&nbsp;to&nbsp;determine&nbsp;mass&nbsp;moment&nbsp;of&nbsp;inertia&nbsp;of&nbsp;

Shaft with taper key is an example of

According to D' Alembert's principle, the body is in equilibrium position if

Which of the following condition is true for uniform wear theory?

Which theory is used to determine safe design of bearings?

Frictional torque transmitted by uniform wear theory is more than torque transmitted by uniform pressure theory

Double block brake is a type of

Which energy is absorbed by the brakes of an elevator during braking process?

In single shoe brake, when is uniform normal pressure observed between block and drum?

Which type of brakes have wooden blocks placed inside flexible steel band?

According to loop closure equation, in a closed loop mechanism the sum of relative position vectors for the links is

Why is double Hooke's joint used?

Which of the following kinematic pairs is classified depending upon the mechanical arrangement between the links?

Which pairs are considered as higher pairs?

Cam and follower is an example of

The equation j = (3/2)n – 2 represents relation between number of joints (L.H.S) and number of links (R.H.S). The chain is constrained if

Trifilar suspension system is used to determine mass moment of inertia of

The difference between which two factors denotes the correction couple?

On which factors does law of friction depend?

What are crank effort diagrams?

Which of the following statements is/are true?

Which clutch is known as wet clutch?

In centrifugal clutches, when is the contact between shoe friction lining and surface of drum observed?

If brakes are applied on front wheels of a car and if it moves on a level road, then retardation of the car is calculated using the formula

Which parameters can be measured using a dynamometer?

Identify the type of absorption dynamometer ?

Which of the following statements is/are false?

In a Hooke's joint, maximum velocity ratio between driving and driven shaft is possible if θ is

Which relation is used to denote condition for equal speeds, when driving and driven shafts are connected by Hook's joint?

Calculate the angle of driving shaft, if the two shafts of the Hooke's joint are inclined at an angle of 18.50o

One quaternary joint is equal to how many binary joints?

Watt's mechanism is based on

Scotch yoke mechanism is the inversion of

Calculate torque acting on the crank, if tangential force acting on the engine is 150 kN and 300 mm is the crank radius.

Calculate the thrust in connecting rod, if piston effort is 200 kN and crank makes an angle of 45o from TDC. Assume obliquity ratio = 3.5

Torsional pendulum is used to determine mass moment of inertia of