Instrumentation Transducers Questions and Answers – Mechanical Systems

This set of Instrumentation Transducers Multiple Choice Questions & Answers (MCQs) focuses on “Mechanical Systems”.

1. What will be the transfer function of a body of mass M, in which input quantity is force and output quantity is displacement?
a) sM
b) s2M
c) 1/sM
d) 1/( s2 M)
View Answer

Answer: d
Explanation: Force can be described as the product of mass and acceleration, or in terms of displacement F = M(dx2 (t)) / (dt2). Converting to Laplace domain and finding transfer function we obtain the answer.

2. Mass and Moment of inertia are equivalent quantities.
a) True
b) False
View Answer

Answer: a
Explanation: Differential equation of torque is given as T=j(dθ2(t)) / (dt2) and differential equation corresponding to force is given as F = M(dx2(t))/(dt2). Equating these two expressions we obtain mass ‘M’ and moment of inertia ‘j’ are equivalent quantities.

3. Linear and torsional springs are used to provide ________________ and __________________
a) Restoring force and torque respectively
b) Restoring torque and force respectively
c) Restoring torque only
d) None of the mentioned
View Answer

Answer: a
Explanation: Linear springs are used to provide restoring force and torsional springs are used to provide restoring torque respectively.
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4. Restoring force of a spring under stress is F(s) = ____________
a) X(s)
b) KX(s)
c) K
d) None of the mentioned
View Answer

Answer: b
Explanation: Restoring force of a spring under stress is given by KX(s), where K is the stiffness of spring and X(s) is the displacement made.

5. Spring is a ___________ order system.
a) Zero
b) First
c) Second
d) Third
View Answer

Answer: a
Explanation: From transfer function of spring, it is clear that spring is a zero order system. Transfer function (F(s))/(G(s))=K.
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6. Name the Friction which acts till the body starts moving?
a) Dynamic friction
b) Static friction
c) Viscous friction
d) None of the mentioned
View Answer

Answer: b
Explanation: Static friction is a constant value and is the minimum force required to start motion of a body.

7. What will you call the friction between a relative motion of two bodies?
a) Static friction
b) Dynamic friction
c) Viscous friction
d) None of the mentioned
View Answer

Answer: c
Explanation: Viscous friction acts when there is a relative motion between two bodies. It always acts opposite to direction of velocity.
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8. What is the equivalent quantity of capacitance in the transfer function of the viscous force?
a) Viscous force
b) Viscosity
c) Damping coefficient
d) Inertia
View Answer

Answer: c
Explanation: Transfer function of the viscous force is given as 1/sB, and the transfer function of the capacitor is given as 1/sC. On equating B and C becomes equivalent quantities.

9. Transfer function of force acting on a body is given as 1/(s2 M). What will be the transfer function of a rotating body?
a) 1/(s2 j)
b) 1/j
c) 1/sM
d) None of the mentioned
View Answer

Answer: a
Explanation: Mass M and Moment of inertia j are equivalent, thus transfer function of rotational motion can be obtained by replacing M with j.
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10. 20N force is acting on a 5Kg body. What will be its rate of change of velocity?
a) 4m/s2
b) 5m/s2
c) 10m/s2
d) 2m/s2
View Answer

Answer: a
Explanation: Rate of change of velocity is acceleration and force can be described as product of mass and acceleration.

Sanfoundry Global Education & Learning Series – Instrumentation Transducers.

To practice all areas of Instrumentation Transducers, here is complete set of 1000+ Multiple Choice Questions and Answers.

If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]

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Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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