Process Instrument and Control Engineering Online Quiz Questions test2

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1. The Ringelmann chart is associated with measurement of:
smoke density	S02 and S03
NO	CO

2. The pH value is a measure of hydrogen ionin a solution. The letters pH stand for :
percentage of H2 in solution	power of the hydrogen ion concentration
presence of hydrogen ions	purity of H20

3. The density can be measured using :
weight	buoyancy
hydrostatic head	all of above

4. Electrode potential is concerned with measurement of:
density	viscosity
chemical analysis	PH

5. Almost all pH measurements are best made with a:
glass electrode	solid state electrode
liquid ion exchange electrode	redox electrode

6. Which measurement is a good guide to the quality of the water :
conductivity	pH
dissolved 02 content	turbidity

7. The commonly used unit of conductivity is:
mho	mho/m
n mho/cm	ohm/m

8. Spectrophotometer is used to :
measure surface hardness	measure surface characteristics
measure chemical composition of alloys	analyse colour spectrum

9. The change in length of humidity sensitive elements is measured by :
hydrometer	hygrometer
psychrometer	photometer

10. The orsat apparatus is used for measuring:
chemical analysis of flue gases	moisture in air
composition of alloys	colour spectrum

11. The error caused in vibration measuring equipment due to non compliance (not stiff) of bond made between sensor and the surface it is mounted is called :
cross-coupling	coupling compliance
influence error	subject loading by sensor

12. Machine health monitoring is mainly based on measurement of:
lub oil pressure	vibrations at strategic points
bearing temperature measurement	efficiency and losses of machine

13. Mass-spring seismic sensors measure directly the :
displacement	velocity
acceleration	shock

14. An operation which, in the presence of a disturbing influence, tends to reduce the difference between the actual state of a system and an arbitrarily varied desired state and which does so on the basis of this difference, is called :
automatic control	feedback control
open feed back control	closed feed back control

15. An apparatus which measures the value of a quantity or condition which is subject to change with time, and operates to maintain within limits this measured value, is called
automatic regulator	self controller
feedback controller	two-position controller

16. The time required for the controlled variable to reach a specified value after the application of a step input is called :
rise time	settling time
response time	peak time

17. The operating characteristic which inherently assists the establishment of equilibrium is called :
corrective action	self regulation
automatic regulation	proportional control action

18. The quantity or condition of the controlled system which is directly, measured or controlled :
set point	deviation
controlled variable	command signal

19. The range of values through which the variable must change to cause the final control element to move from one extreme position to the other :
throttling range	disturbance
proportional band	response

20. The range of scale values through which the controlled variable must pass in order that the final control element be moved through its entire range :
throttling	floating band
controller band	proportional band

Process Instrument and Control Quiz Questions Test1

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1. A device for determining die value or magnitude of a quantity or variable :
sensor	transducer
gauge	instrument

2. Determining moisture in steam by measuring the temperature in a throttling calorimeter is an example of :
direct measurement	indirect measurement
measurement by comparison	measurement by calibration

3. The closeness with which the reading of an instrument approaches the true value of the variable being measured is called :
accuracy	precision
sensitivity	resolution

4. Errors due to assignable causes are called :
static errors	systematic errors
calibration errors	random errors

5. Pick up the appropriate word for A pointer moving over a scale :
instrument	indicator
transducer	gauge

6. Pick up the appropriate word for A reading obtained from the motion of a pointer on a scale :
analog	digital
display	indicator

7. Pick up the appropriate word for The reading displayed as a number, a series of holes on a punched card, or a sequence of pulses on magnetic tape :
pulse train	digital
analog	numeral

8. For studying detailed variations with time, one uses :
indicator	digital indicator
recorder	integrator

9. The condition of how much successive readings differ from one another for a fixed value of the variable is called :
accuracy	error
sensitivity	precision

10. The ratio of output signal or response of the instrument'" to a change in input or measured variable is called :
sensitivity	precision
resolution	threshold

11. The smallest change in measured value to which the instrument will respond is called
accuracy	precision
amplification	resolution

12. It responds directly to the measured quantity, producing a related motion or signal :
sensing element	transducer
transmitter	indicator

13. Which of the following is used to count the number of brass items passing on a conveyor line, when no contact is permitted with the object:
event counter	mechanical counter
magnetic pick up	photoelectric cell

14. Which of the following does not pertain to timing device :
charging of a condenser	flow of oil through a dash pot
release of air through a nozzle	piezoelectric crystal

15. Motion of fast-moving systems may be timed and studied by means of a :
stroboscope	piezoelectric crystal
electronic timer	chronometer

16. In which device the input motion changes the inductive coupling between primary and secondary coils :
potentiometer	synchro
collimator	protractor

17. Which effect is useful in measuring rapidly varying forces :
piezoelectric	strain gauge
photovoltaic	pneumatic gauging

18. Pressure measuring devices are not based on:
measure of an equivalent height of liquid column	measure of the force exerted on a fixed area
measure of some change in electrical or physical characteristics of the fluid	area measurement by polar planimeter

19. Which of the following may be measured by the deflection of an elastic element, by balancing against a known force, by the acceleration produced in an object of known mass :
force	pressure
temperature	level

20. The sensitivity of reading of manometer can be increased by :
inclining the manometer rube	using low specific gravity fluid
application of optical magnification	use of level sensing device

Process Instrument and Control Online Quiz Questions

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