Description : A moving system force in an analog instruments which causes the moving system to deflect from its zero position.
Last Answer : deflecting force
Description : An instrument in which the magnitude of the measured quantity is indicated by means of pointer.
Last Answer : analog instrument
Description : Which of the following forces does not act on the moving systems of analog instruments?
Last Answer : an electrostatic force
Description : A force in analog instrument which quickly brings the moving system to rest in its final position.
Last Answer : damping force
Description : As the deflection of the moving system increases, the controlling torque in an indicating instrument.
Last Answer : increases
Description : What is the force acting on the pointer of an indicating instrument when it is in motion?
Last Answer : controlling, damping and deflecting torques
Description : What is the typical full-scale deflection current of a moving coil instrument?
Last Answer : 50mA
Description : Current range extension in moving coil instruments can be achieved by placing a ___ in shunt with the instrument.
Last Answer : low resistance resistor
Description : An ammeter has a full-scale deflection current of 100mA. If the same ammeter is used to measure a full-scale current of 1.0ampere, what is the value of the shunt resistor in ohms if the voltage across the meter is 9.0 volts?
Last Answer : 10 ohms
Description : When both deflecting and controlling torque act, the pointer of an indicating instrument comes to
Last Answer : rest
Description : If the pointer of an indicating instrument is in motion, then what opposes deflecting torque?
Last Answer : damping and controlling torque
Description : The pointer of an indicating instrument is generally made of
Last Answer : aluminum
Description : A device or mechanism used to determine the value of a quantity under observation.
Last Answer : instrument
Description : What is the degree of exactness of measurement when compared to the expected value of the variable being measured?
Last Answer : Accurary
Description : Majority of analog measuring instrument utilizes one of the following effects.
Last Answer : magnetic effect
Description : The zero-adjust control in an analog type ohmmeter is used to
Last Answer : compensate for the differing internal battery voltage
Description : What kind of voltage is applied to the horizontal deflection plates of the oscilloscope?
Last Answer : sweep voltage
Description : Generally, oscilloscope uses what type of deflection?
Last Answer : electrostatic deflection
Description : A galvanometer with 20 ohms coil resistence has a full-scale deflection of 10 mA. A 0.02 ohm is placed across the meter to increase its rating capacity. What is the new full scale current for the meter?
Last Answer : False.
Description : Induction type instruments are mostly used as ___
Last Answer : watt-hour meter
Description : Electrostatic instruments are exclusively used as
Last Answer : voltmeters
Description : Which electrical instruments below is the most sensitive?
Last Answer : PMMC
Description : Attraction and repulsion instruments are considered
Last Answer : moving iron instruments
Description : Errors due to frictions of the meter movement, incorrect spring tension, improper calibration or faulty instruments:
Last Answer : instrument errors
Description : When the pointer of an analog ohmmeter reads close to zero, the resistor being measured is? A.overheated B.shorted C.open D.reversed
Last Answer : When the pointer of an analog ohmmeter reads close to zero, the resistor being measured is? A.overheated B.shorted C.open D.reversed
Description : Pointer of an analog ohmmeter reading close to zero, indicates the resistor being measured is: A. overheated B. shorted C. open D. reversed
Last Answer : Pointer of an analog ohmmeter reading close to zero, indicates the resistor being measured is: shorted
Description : Why flow is measured in square root?
Last Answer : Flow varies directly as the square root of different pressure F = K square root of D/P. Since this flow varies as the square root of differential pressure the pen does not directly indicate flow. The flow can be determined by taking the square root of the pen. Say the pen reads 50% of chart.
Description : The frequency of rotation in some rotating machinery can be measured by a
Last Answer : stroboscope
Description : Most AC voltmeters have an rms scale which is valid only if the input signal being measured is a __ signal.
Last Answer : sinusoidal
Description : In VTVMS, ___ refers to the smallest signal that can be reliably measured
Last Answer : sensitivity
Description : The smallest change in a measured variable to which an instrument will respond.
Last Answer : resolution
Description : Insulation resistance is measured by which meter?
Last Answer : megger
Description : Tank-circuit frequency can be measured by
Last Answer : grid dip meter
Description : What is this instrument or circuit that has four or more arms, by means of which one or more of the electrical constance of an unknown component may be measured?
Last Answer : bridge
Description : A small swamping resistance is connected in series with operating coil of a moving coil ammter in order to compensate for the effects of ____
Last Answer : temperature variation
Description : In a moving coil ammeter, a ___ is connected in series with the coil to compensate for temperature variations
Last Answer : swamping resistors
Description : Moving-iron instrument has a/an scale
Last Answer : squared
Description : To increase the measuring capability of a moving-iron ac ammeter, a __ should be used.
Last Answer : different number of turns of coils
Description : Permanent-magnet moving coil instrument can be used in
Last Answer : dc work only
Description : Meters with moving coil are normally used for measuring ____
Last Answer : dc only
Description : What is the reason why the scale of a permanent-magnet moving coil instrument is uniform?
Last Answer : because it is spring controlled
Description : What is the typical full-scale voltage across a moving coil voltmeter?
Last Answer : 50mV
Description : The force required to move the pointer in an indicating instruments is
Last Answer : The force required to move the pointer in an indicating instruments is deflecting force
Description : An instrument of device having recognized permanent of stable value that is used as a reference.
Last Answer : standard instrument/device
Description : Decreasing the value of the shunt resistor of an ammeter, it current measuring capability
Description : The deviation of a reading from the expected value
Last Answer : error
Description : You are given a mercury manometer range 0 -760 mm ? A vacuum gauge reads 60 mm vacuum. The test manometer reads 50 vacuum ? Which of the two in correct.
Last Answer : The transmitter is correct because 760 - 50 = 710 mm abs.
Description : In measurements, the sum of a set of number divided by the total number of pieces of data in the given set is called ______
Last Answer : arithmetic mean
Description : When testing a capacitor with an analog type ohmmeter, a good capacitor will be indicated when _____________. A. there is no meter deflection B. the meter deflects to a low resistance value and ... deflects to a low resistance value and increases rapidly to a higher value, but stays fairly low
Last Answer : Answer: C