theory of machines MCQs – Page 6

Practise focused theory of machines questions with marked answers for exam preparation and subject revision.

theory of machines Mcqs

101. The lower pair is a_____________________?
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A. point contact pair

B. does not exist

C. closed pair

D. open pair

E. sliding pair

102. A chain comprises of 5 links having 5 joints. Is it kinematic chain ?
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A. data are insufficient to determine it

B. unpredictable

C. it is a marginal case

D. no

E. yes

103. Sense of tangential acceleration of a link_________________?
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A. none of the above

B. is opposite to that of velocity

C. could be either same or opposite to velocity

D. is same as that of velocity

E. is perpendicular to that of velocity

104. A foot step bearing and rotor of a vertical turbine form examples of___________________?
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A. none of the above

B. partially constrained motion

C. successfully constrained motion

D. incompletely constrained motion

E. completely constrained motion

105. Rectilinear motion of piston is converted into rotary by_______________?
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A. cross head

B. connecting rod

C. gudgeon pin

D. four bar chain mechanism

E. slider crank

106. The number of links and instantaneous centers in a reciprocating engine mechanism are ___________________?
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A. 4, 6

B. 5, 4

C. 6, 4

D. 4, 5

E. 4, 4

107. Cam angle is defined as the angle_________________?
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A. through which, the cam rotates during the period in which the follower remains in the highest position

B. during which the follower returns to its initial position

C. moved by the can from beginning of i ascent to the termination of descent

D. of rotation of the cam for a definite displacement of the follower

E. moved by the cam from the instant the follower begins to rise, till it reaches its highest position

108. In higher pair, the relative motion is_____________________?
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A. purely turning

B. purely sliding

C. purely rotary

D. purely surface contact

E. combination of sliding and turning

109. The type of pair formed by two elements which are so connected that one is constrained to turn or revolve about a fixed axis of another element is known as__________________?
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A. spherical pair

B. turning pair

C. rolling pair

D. lower pair

E. sliding pair

110. It is required to connect two parallel shafts, the distance between whose axes is small and variable. The shafts are coupled by_______________?
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A. knuckle joint

B. Oldhams coupling

C. flexible coupling

D. universal joint

E. electromagnetic coupling

111. In automobiles the power is transmitted from gear box to differential through _________________?
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A. Hookes joint

B. universal joint

C. bevel gear

D. Knuckle joint

E. Oldhams coupling

112. For simple harmonic motion of the of follower, a cosine curve represents___________________?
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A. velocity diagram

B. all of the above

C. displacement diagram

D. none of the above

E. acceleration diagram

113. Lower pairs are those which have___________________?
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A. two elements that permit relative motion

B. surface contact between the two elements when in motion

C. point or line contact between the two elements when in motion

D. none of the above

E. elements of pairs not -held together mechanically

114. Inertia force acts___________________?
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A. along the direction of accel* force

B. none of the above

C. opposite to the direction of ace ing force

D. perpendicular to the accel< force

E. in any direction w.r.t. accel* force depending on the magnit two

115. Cam size depends upon__________________?
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A. prime circle

B. base circle

C. none of the above

D. pitch circle

E. outer circle

116. In S.H.M., acceleration is proportional to _________________?
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A. velocity

B. all of the above

C. displacement

D. rate of change of velocity

E. none of the above

117. The maximum value of the pressure angle in case of cam is kept as________________?
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A. 30

B. 14

C. 20

D. 25.

E. 10

118. The Bifilar suspension method is used to determine__________________?
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A. position of balancing weights

B. moment of inertia

C. centripetal acceleration

D. natural frequency of vibration

E. angular acceleration of a body

119. Two systems shall be dynamically equivalent when____________________?
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A. M.I. of two about an axis through e.g. is equal

B. all of the above

C. e.g. of two coincides

D. the mass of two are same

E. none of the above

120. Kleins construction gives a graphica construction for________________?
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A. acceleration polygon

B. angular acceleration

C. velocity polygon

D. slider-crank mechanism

E. four bar chain mechanism

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