Theory Of Machine MCQ Questions & Answers

21

The mechanism consisting of three turning pairs and one sliding pair, is called a

A) Single slider crank chain B) Whitworth quick return motion mechanism C) Crank and slotted lever quick return motion mechanism D) All of the above

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Answer & Solution

Answer: Option D

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22

In an ideal machine, the output as compared to input is

A) Less B) More C) Equal D) May be less or more depending on efficiency

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Answer & Solution

Answer: Option C

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23

The velocity of the belt for maximum power is (where m = Mass of the belt in kg per meter length)

A) $$\frac{{\text{T}}}{3}$$ B) $$\frac{{{\text{Tg}}}}{3}$$ C) $$\sqrt {\frac{{\text{T}}}{{3{\text{m}}}}} $$ D) $$\sqrt {\frac{{3{\text{m}}}}{{\text{T}}}} $$

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Answer & Solution

Answer: Option C

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24

In the below figure, PC is the connecting rod and OC is the crank making an angle θ with the line of stroke PO and rotates with uniform angular velocity at $$\omega $$ rad/s. The Klien's acceleration diagram for determining the acceleration of the piston P is shown by quadrilateral CQNO. The acceleration of the piston P with respect to the crank-pin C is given by
Theory of Machine mcq question image

A) $${\omega ^2}$$ × NO B) $${\omega ^2}$$ × CO C) $${\omega ^2}$$ × CN D) $${\omega ^2}$$ × QN

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Answer & Solution

Answer: Option C

Solution:

25

In steady state forced vibrations, the amplitude of vibrations at resonance is __________ damping coefficient.

A) Equal to B) Directly proportional to C) Inversely proportional to D) Independent of

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Answer & Solution

Answer: Option C

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26

The swaying couple is due to the

A) Primary unbalanced force B) Secondary unbalanced force C) Two cylinders of locomotive D) Partial balancing

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Answer & Solution

Answer: Option A

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27

Pitch point on a cam is

A) Any point on pitch curve B) The point on cam pitch curve having the maximum pressure angle C) Any point on pitch circle D) The point on cam pitch curve having the minimum pressure angle

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Answer & Solution

Answer: Option B

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28

The equivalent length of a simple pendulum which gives the same frequency as a compound pendulum is

A) $$\frac{{\text{h}}}{{{\text{k}}_{\text{G}}^2 + {{\text{h}}^2}}}$$ B) $$\frac{{{\text{k}}_{\text{G}}^2 + {{\text{h}}^2}}}{{\text{h}}}$$ C) $$\frac{{{{\text{h}}^2}}}{{{\text{k}}_{\text{G}}^2 + {{\text{h}}^2}}}$$ D) $$\frac{{{\text{k}}_{\text{G}}^2 + {{\text{h}}^2}}}{{{{\text{h}}^2}}}$$

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Answer & Solution

Answer: Option B

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29

The frequency of oscillation of a compound pendulum is

A) $$2\pi \sqrt {\frac{{{\text{gh}}}}{{{\text{k}}_{\text{G}}^2 + {{\text{h}}^2}}}} $$ B) $$2\pi \sqrt {\frac{{{\text{k}}_{\text{G}}^2 + {{\text{h}}^2}}}{{{\text{gh}}}}} $$ C) $$\frac{1}{{2\pi }}\sqrt {\frac{{{\text{gh}}}}{{{\text{k}}_{\text{G}}^2 + {{\text{h}}^2}}}} $$ D) $$\frac{1}{{2\pi }}\sqrt {\frac{{{\text{k}}_{\text{G}}^2 + {{\text{h}}^2}}}{{{\text{gh}}}}} $$

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Answer & Solution

Answer: Option C

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30

The minimum periodic time of a compound pendulum is

A) $$\frac{1}{{2\pi }}\sqrt {\frac{{{{\text{k}}_{\text{G}}}}}{{\text{g}}}} $$ B) $$\frac{1}{{2\pi }}\sqrt {\frac{{{\text{2}}{{\text{k}}_{\text{G}}}}}{{\text{g}}}} $$ C) $$2\pi \sqrt {\frac{{{{\text{k}}_{\text{G}}}}}{{\text{g}}}} $$ D) $$2\pi \sqrt {\frac{{{\text{2}}{{\text{k}}_{\text{G}}}}}{{\text{g}}}} $$

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Answer & Solution

Answer: Option D

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Theory Of Machine MCQ Questions & Answers | Mechanical Engineering