Measurement, Conversion and Control - General Questions Online Exam Quiz
Measurement, Conversion and Control - General Questions GK Quiz. Question and Answers related to Measurement, Conversion and Control - General Questions. MCQ (Multiple Choice Questions with answers about Measurement, Conversion and Control - General Questions
What device is similar to an RTD but has a negative temperature coefficient?
Options
A : Strain gauge
B : Thermistor
C : Negative-type RTD
D : Thermocouple
The resistive change of a strain gauge
Options
A : is based on the weight placed upon it, but can be many thousands of ohms
B : is usually no more than 100
C : is based on the gauge factor, but is typically less than an ohm
D : has a positive temperature coefficient
The silicon-controlled rectifier can be turned off
Options
A : by a negative gate pulse
B : by forced commutation
C : with the off switch
D : when the breakover voltage is exceeded
The output voltage of a typical thermocouple is
Options
A : less than 100 mV
B : greater than 1 V
C : Thermocouples vary resistance, not voltage.
D : None of the above
The connections to a thermocouple
Options
A : can produce an unwanted thermocouple effect, which must be compensated for
B : produce an extra desirable thermocouple effect
C : must be protected, since high voltages are present
D : produce an extra desirable thermocouple effect and must be protected, since high voltages are present
What is the zero-voltage switch used for?
Options
A : To reduce radiation of high frequencies during turn-on of a high current to a load
B : To control low-voltage circuits
C : To provide power to a circuit when power is lost
D : For extremely low-voltage applications
Temperature sensing can be achieved by the use of
Options
A : thermocouples
B : RTDs
C : thermistors
D : All of the above
The purpose of compensation for a thermocouple is
Options
A : to decrease temperature sensitivity
B : to increase voltage output
C : to cancel unwanted voltage output of a thermocouple
D : used for high-temperature circuits
The change in value of an analog signal during the conversion process produces what is called the
Options
A : quantization error
B : resolution error
C : Nyquist error
D : sampling error
Which of the following performance specifications applies to a sample-and-hold circuit?
Options
A : Aperture time
B : Aperture droop
C : Feedback
D : Acquisition jitter
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