Description : Type of power-line frequency meter composed of vibrating iron reed placed in alternating magnetic field
Last Answer : Vibrating Reed Type
Description : What is that instrument used for measuring the strength and direction of magnetic fields?
Last Answer : magnetometer
Description : It is the reciprocal of the full-scale current of a meter
Last Answer : sensitivity
Description : A meter has a full-scale current of 50uA, what is its sensitivity?
Last Answer : Is=1/50uA=20kohm/V
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 : 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 : A testing device called a 'growler' is being used to locate a shorted coil in the stator of an AC electrical machine. When the 'feeler' is moved over a slot containing the shorted coil _____________. ... . the meter needle will be deflected to zero D. the meter needle will be deflected to full-scale
Last Answer : Answer: A
Description : A device or instrument, which delivers signals of precise frequency and amplitude, usually over a wide range
Last Answer : signal generators
Description : An electrodynamic meter used t measure power
Last Answer : wattmeter
Description : A type of meter that gives a precise reading of voltage, current or resistance where there is the generation of samples at the input and then feeds it to a digital read-out.
Last Answer : DMM
Description : What is the most common type of meter movement?
Last Answer : D' Arsonval
Description : What type of instrument is the watt-hour meter?
Last Answer : an integrating
Description : A device used to mechanically measure the output power of a motor
Last Answer : dynamometer
Description : The only use of voltage senstive meter movement
Last Answer : very low voltage measurement
Description : When the meter is unsufficiently damped, it is considered as ___
Last Answer : underdamped
Description : Calculate the series resistance needed to convert a D' Arsonval meter with FSD of 100uA and a meter resistance of 1kohm to a voltmeter with 10V FSD.
Last Answer : Rs=10V/100uA - 1kohm = 99kohm
Description : A meter when __ will become insensitive to small signals
Last Answer : overdamped
Description : Insulation resistance is measured by which meter?
Last Answer : megger
Description : Errors due to frictions of the meter movement, incorrect spring tension, improper calibration or faulty instruments:
Last Answer : instrument errors
Description : What is that meter that depends for its operation on the forces attraction and repulsion
Last Answer : electrostatic instrument
Description : A tunable RF instrument, which, by means of a sharp dip of an indicating meter, indicates resonance with an external circuit under test
Last Answer : dip meter
Description : In meter movement, how do oyu prevent the meter from oscillating and overswing?
Last Answer : by damping
Description : Calculate the shunt resistance needed to increase the FSD of an ammeter 5 times if the meter resistance is 1kohm
Last Answer : 250ohms
Description : ___ meter is the most sensitive
Last Answer : 1uA
Description : What sensor provides a change of resistance with typical power range of 1uW to 10mW and with maximum frequency greater than 100GHz
Last Answer : thermistor sensor
Description : A common technique for measuring power at high frequency is to ______
Last Answer : employ a sensing element that converts the RF power to a measureable dc or low-frequency signal
Description : What do you call of an instrument that depends for its operation on the reaction between magnetic flux set up by currents in fixed windings and other currents set up by electromagnet induction in movable conducting parts?
Last Answer : induction instrument
Description : For amplitude measurements, ___ scale is calibrated in either volts per centimeter (V/cm), or millivolts per centimeter (mV/cm)
Last Answer : vertical
Description : The scale of a hot-wire instrument is a/an ___function
Last Answer : squared
Description : Moving-iron instrument has a/an scale
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 : For time measurements, ___ scale of the scope is used.
Last Answer : horizontal
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 : Indicating instrument is assumed to be most accurate at what part of the scale?
Last Answer : at half or full
Description : On a simple ohmmeter, the 0 ohm(s0 mark is located __ of the scale
Last Answer : at far right
Description : What is the typical full-scale voltage across a moving coil voltmeter?
Last Answer : 50mV
Description : What is the typical full-scale deflection current of a moving coil instrument?
Last Answer : 50mA
Description : What is the principle of a pressure gauge ?
Last Answer : Pressure works on Hooks law. Principle : "Measuring the stress in an elastic medium"
Description : What do you call of the frequency-sensitive bridge in which two adjacent arms are resistances and other are RC combinations?
Last Answer : Wein Bridge
Description : This is a method of using a Wheatstone brdige to determine the distance from the test point to a fault in a telephone or telegraph line or cable.
Last Answer : varmeter/reactive VA meter
Description : A ____ operates on the magnetic attraction-repulsion principles.
Last Answer : milliameter
Description : An instrument of device having recognized permanent of stable value that is used as a reference.
Last Answer : standard instrument/device
Description : An electronic measuring device that provide instantaneous visual indication of voltage excursions
Last Answer : oscilloscope
Description : A device or instrument able to generate noise with accurate voltage for test purposes
Last Answer : noise generator
Description : What is the device, which depends on the action of a movalbe permanent magnet, in aligning itself in the resultant field produced by a fixed permanent magnet or current- carrying coils whose axes are displaced by a fixed angle?
Last Answer : moving-magnet instrument
Description : A ____ is a device that can test all pins of an IC at the same time.
Last Answer : logic clip
Description : A device or mechanism used to determine the value of a quantity under observation.
Last Answer : instrument
Description : In troubleshooting a circuit in a console, you find that a resistor may be faulty. Which of the precautions listed must be observed when using an ohmmeter to carry out this test? A. Correct polarity ... D. The resistor's circuit must be de-energized and at least one end of the component isolated.
Last Answer : Answer: D