Measurement, Conversion and Control - General Questions (2)

Directions to Solve

The connections to a thermocouple

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

Answer: Option A

Explanation:

No answer description available for this question

10.

The output voltage of a typical thermocouple is

A.	less than 100 mV
B.	greater than 1 V
C.	Thermocouples vary resistance, not voltage.
D.	None of the above

Answer: Option A

Explanation:

No answer description available for this question

11.

The silicon-controlled rectifier can be turned off

A.	by a negative gate pulse
B.	by forced commutation
C.	with the off switch
D.	when the breakover voltage is exceeded

Answer: Option B

Explanation:

No answer description available for this question

12.

The resistive change of a strain gauge

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

Answer: Option C

Explanation:

No answer description available for this question

13.

What device is similar to an RTD but has a negative temperature coefficient?

Answer: Option B

Explanation:

No answer description available for this question.