Question 31 : " Consider the function F (s)= 5/s(s²+3s+2), the initial value of f(t) is:"
1. " 5"
2. " 5/2"
3. " 5/3"
4. " 0"
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Question 32 : " In a closed loop for which the output is the speed of the motor, the output rate control can be used to:"
1. " Limit the speed of the motor"
2. " Limit the torque output of the motor"
3. " Reduce the damping of the system"
4. " Limit the acceleration of the motor"
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Question 33 : " A tachometer is used as an inner loop in a position control servo-system. What is the effect of feedback on the gain of the sub-loop incorporating tachometer and in the effective time constant of the system?"
1. " Both are reduced"
2. " Gain is reduced but the time constant is increased"
3. " Gain is increased but the time constant is reduced"
4. " Both are increased"
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Question 34 : " The transfer function of a LTI system is given as 1/(s+1). What is the steady-state value of the unit-impulse response?"
1. " 0"
2. " 1"
3. " 2"
4. " Infinite"
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Question 35 : " Error detector:"
1. " Armature controlled FHP DC motor"
2. " A pair of synchronous transmitter and control transformer"
3. " Tach generator"
4. " Amplidyne"
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Question 36 : " Open loop transfer function of a system having one zero with a positive real value is called."
1. " Zero phase function"
2. " Negative phase function"
3. " Positive phase function"
4. " Non-minimum phase function"
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Question 37 : " If the gain of the critical damped system is increased it will behave as"
1. " Oscillatory"
2. " Critically damped"
3. " Overdamped"
4. " Underdamped"
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Question 38 : " Assertion (A): The stator winding of a control transformer has higher impedance per phase
Reason (R): The rotor of control transformer is cylindrical in shape."
1. " Both A and R are true and R is correct explanation of A"
2. " Both A and R are true and R is not correct Explanation of A"
3. " A is True and R is false"
4. " A is False and R is true"
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Question 39 : " Consider the following servomotors:
1. AC-two phase servomotor
2. DC servomotor
3. Hydraulic servomotor
4. Pneumatic servomotor
The correct sequence of these servomotor in increasing order of power handling capacity is:"
1. " 2,4,3,1"
2. " 4,2,3,1"
3. " 2,4,1,3"
4. " 4,2,1,3"
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Question 40 : " The tacho meter has sensitivity of 5V/1000rpm. The gain constant of the tacho meter is:"
1. " 0.48V/rad/sec"
2. " 0.048V/rad/sec"
3. " 4.8V/rad/sec"
4. " 48V/rad/sec"
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