Question 51 : " Which of the following cannot be measured by LVDT?"
1. " Displacement"
2. " Velocity"
3. " Acceleration"
4. " Pressure"
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Question 52 : " Hydraulic torque transmission system is analog of :"
1. " Amplidyne set"
2. " Resistance-capacitance parallel circuit"
3. " Motor-generator set"
4. " Any of the mentioned"
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Question 53 : Linear lumped parameter models are not valid under situations as:
1. Transmission pipe between the hydraulic pump and the motor causes a time lag in transportation of oil from pump to motor
2. Transmission of heat by conduction or convection produces serious transportation lag
3. Transmission pipe causes the time lag and loss of heat by conduction and convection
4. Transmission of pipe causes neither any time lag nor any heat loss
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Question 54 : " In a system low friction co-efficient facilitates:"
1. " Reduced velocity lag error"
2. " Increased velocity lag error"
3. " Increased speed of response"
4. " Reduced time constant of the system"
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Question 55 : " The first order control system, which is well designed, has a"
1. " Small bandwidth"
2. " Negative time constant"
3. " Large negative transfer function pole"
4. " None of the mentioned"
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Question 56 : " A.C. servomotor is basically a"
1. " Universal motor"
2. " Single phase induction motor"
3. " Two phase induction motor"
4. " Three phase induction motor"
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Question 57 : " Roots with higher multiplicity on the imaginary axis makes the system :"
1. " Absolutely stable"
2. " Unstable"
3. " Linear"
4. " None of the mentioned"
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Question 58 : " Stability of a system implies that :"
1. " Small changes in the system input does not result in large change in system output"
2. " Small changes in the system parameters does not result in large change in system output"
3. " Small changes in the initial conditions does not result in large change in system output"
4. " Small changes in the initial conditions result in large change in system output"
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Question 59 : Consider the following statements:
1. The effect of feedback is to reduce the system error
2. Feedback increases the gain of the system in one frequency range but decreases in another.
3. Feedback can cause a system that is originally stable to become unstable
Which of these statements are correct.
1. 1,2 and 3
2. 1 and 2
3. 2 and 3
4. 1 and 3
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