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The mixing vat in a factory receives liquid ingredients through six separate value--- labeled R.S.T.U,Y and Z -- each of which has exactly two settings: open and closed.The mixing vat operator must ensure that each valve is set open or closed according to the following conditions: If T is open, both S and Z must be closed, R and Z cannot both be closed at the same time; If Y is closed, Z must also be closed;S and U cannot both be open at the same time. If the maximum number of valves that can be closed at the same time are closed which of the following must true?
A R is open
B S is open
C T is open
D Z is open
The mixing vat in a factory receives liquid ingredients through six separate value--- labeled R.S.T.U,Y and Z -- each of which has exactly two settings: open and closed.The mixing vat operator must ensure that each valve is set open or closed according to the following conditions: If T is open, both S and Z must be closed, R and Z cannot both be closed at the same time; If Y is closed, Z must also be closed;S and U cannot both be open at the same time. If R is closed and U is open, which of the following must be true?
A S is open
B T is open
C T is closed
D Y is closed
The mixing vat in a factory receives liquid ingredients through six separate value--- labeled R.S.T.U,Y and Z -- each of which has exactly two settings: open and closed.The mixing vat operator must ensure that each valve is set open or closed according to the following conditions: If T is open, both S and Z must be closed, R and Z cannot both be closed at the same time; If Y is closed, Z must also be closed;S and U cannot both be open at the same time. If Z is open, which of the following must be true?
A S is open
B T is open
C U is open
D y is open
The mixing vat in a factory receives liquid ingredients through six separate value--- labeled R.S.T.U,Y and Z -- each of which has exactly two settings: open and closed.The mixing vat operator must ensure that each valve is set open or closed according to the following conditions: If T is open, both S and Z must be closed, R and Z cannot both be closed at the same time; If Y is closed, Z must also be closed;S and U cannot both be open at the same time. Which of the following, if given to the mixing vat operator as an instruction, would not determine the setting of any other valve ?
A S must be open
B T must be open
C U must be open
In closed loop control system, with positive value of feedback gain the overall gain of the system will
A Decrease
B Increase
C Be unaffected
D Exponentially increase
A closed loop system is distinguished from open loop system by which of the following ?
A Servomechanism
B Feedback
C Output pattern
D Input pattern
Compared to an open-loop system, a closed-loop control system is:
A more accurate
B more complex
C more stable
D All of the above
E None of the above
The closed-loop voltage gain of an inverting amplifier equal to
A The ratio of the input resistance to feedback resistance
B The open-loop voltage gain
C The feedback resistance divided by the input resistance
D The input resistance
A non inverting closed loop op amp circuit generally has a gain factor
A Less than one
B Greater than one
C Of zero
D Equal to one
The load factors for live load and dead load are taken respectively as
A 1.5 and 2.2
B 2.2 and 1.5
C 1.5 and 1.5
D 2.2 and 2.2

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