Automatic Control
Objective type questions
1. The device which is used to keep the variable at a constant desired value is called a
(a) amplifier (b) regulator
(C) deviation sensor (d) process controlled
2. A simple Bourdon tube pressure gauge is a
(a) closed-loop control system
(b) manually operated system
(c) open-loop control system
(d) none of the above
3. The transfer function of a 4 to 1 reduction gear box is
(a) 2 (b) 1/4
(c) 4 (d) 1/2
4. The overall transfer function of three blocks connected in series is
(a) {F1 ( D ) X F2 ( D)}/F3 ( D) (b) {F1 ( D ) X F3( D)}/F2 (D)
(c) F1 ( D ) X F2 ( D ) X F3( D) (d) 1 / {F1 ( D ) X F2 ( D ) X F3 ( D)}
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