Transmitters and Signal Conditioning

Multiple Choice Questions UNIT III

1. The output voltage of thermocouple is very small, typically less than ______  A]50 mv b]100mv c]10mv 2. Inustrial thermocouple using thic! "ire have time constant _________  A]#0 t0 50 s b] 10 to 20 s c]100s #. A thermocouple mae from very small guage "ire have a time constant ________  A]#0 t0 50 ms b] 10 to 20 ms c]100ms $. %T& has response time of _______ s or more. A]0.5 to5 b]1to$ c]5 to 10 5. The principle behin %T& is, metal resistance increases "ith ________ in temperature. A]increase b]ecrease c]constant '. %aio transmitter is an electronic evice "hich, evice "hich, "ith the ai of an antenna  prouces ____________"aves  prouces ____________"aves A]micro b]raio c]infrare ,

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In inustrial process inustrial process control a __________ is a telemetry telemetry evice  evice "hich converts measurements from a sensor into a signal, an sens it to control evice locate a istance a"ay A]transucer b]sensor c]transmitter  ). ________ _____________ _____ can can convert convert analog analog signals signals to igital igital signals signals *A+& *A+&,, ma!ing ma!ing communication s"ift an easy an can even sen both analog an ig an igit ital al signals at the same time as enote by &+A. A]transucer b]sensor c]transmitter  -. If a temperature temperature transmi transmitter tter is a smart smart transmitter transmitter,, it "ill accept accept ________ signals signals from from thermoc the rmocoup ouples les an re resi sist stan ance ce si sign gnal alss fr from om res resis istan tance ce tem temper peratu ature re ev evice icess *% *%T T&s &s, , an thermistors thermistors.. A]ampere  b]millivolt c]ohm 10. A transmi transmitter tterss gain, that is the ratio of the output of the tran transmitt smitter er to the input signal, is constant regarless of its of  its output. A]feebac! b]input c]output