Measurements(General Knowledge ) Questions and answers for exam Preparation

General Knowledge

MEASUREMENTS MCQs

Total Questions : 61 | Page 5 of 7 pages

Question 41. . The connections to a thermocouple

can produce an unwanted thermocouple effect, which must be compensated for
produce an extra desirable thermocouple effect
must be protected, since high voltages are present
produce an extra desirable thermocouple effect and must be protected, since high voltages are present

Discuss Question

Answer: Option A. -> can produce an unwanted thermocouple effect, which must be compensated for

Question 42. . Temperature sensing can be achieved by the use of

thermocouples
RTDs
thermistors
All of the above

Discuss Question

Answer: Option D. -> All of the above

Question 43. . The change in value of an analog signal during the conversion process produces what is called the

quantization error
resolution error
Nyquist error
sampling error

Discuss Question

Answer: Option A. -> quantization error

Question 44. . Which of the following performance specifications applies to a sample-and-hold circuit?

Aperture time
Aperture droop
Feedback
Acquisition jitter

Discuss Question

Answer: Option A. -> Aperture time

Question 45. . The purpose of compensation for a thermocouple is

to decrease temperature sensitivity
to increase voltage output
to cancel unwanted voltage output of a thermocouple
used for high-temperature circuits

Discuss Question

Answer: Option C. -> to cancel unwanted voltage output of a thermocouple

Question 46. . RTDs are typically connected with other fixed resistors

in a pi configuration
in a bridge configuration
and variable resistors
and capacitors in a filter-type circuit

Discuss Question

Answer: Option B. -> in a bridge configuration

Question 47. . What is the moving part of a linear variable differential transformer?

Primary
Secondary
Diaphragm
Core

Discuss Question

Answer: Option D. -> Core

Question 48. . Holding current for an SCR is best described as

the minimum current required for turn-off
the current required before an SCR will turn on
the amount of current required to maintain conduction
the gate current required to maintain conduction

Discuss Question

Answer: Option C. -> the amount of current required to maintain conduction

Question 49. . All triacs operate in __________.

quadrant 1 and quadrant 2
quadrant 1 and quadrant 3
quadrant 2 and quadrant 4
quadrant 3 and quadrant 4

Discuss Question

Answer: Option B. -> quadrant 1 and quadrant 3

Question 50. . The number of bits in a digital word determines the number of digital combinations that will be represented. The number of combinations can be calculated by ________.