Description : What sensor provides a dc voltage approximately 1V at 10mW?
Last Answer : diode sensor
Description : A sensing element that provides a dc voltage less than 10mV with typical power range of 0.1 to 100mW
Last Answer : thermal converters
Description : What is the typical power range for thermocouple sensors?
Last Answer : 0.1uW to 100mW
Description : A device or instrument, which delivers signals of precise frequency and amplitude, usually over a wide range
Last Answer : signal generators
Description : Refers to an ac bridge for measuring the inductance and Q of an inductor in terms of resistance, frequency and a standard capacitance.
Last Answer : hay bridge
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 : An oscilloscope provides easy measurement of __ values.
Last Answer : peak to peak
Description : High sensitive DC voltmeter provides accurate reading when measuring ___ circuits.
Last Answer : high resistance
Description : The ___ provides the visual display showing the form of the signal applied as a waveform on the front screen of a cathode ray oscilloscope
Last Answer : CRT
Description : What CRT element provides for controls of the number of electrons passing father into the tube?
Last Answer : control grid
Description : What provides a visual representation of any waveform applied to the input terminals?
Last Answer : cathode ray oscilloscope (CRO)
Description : Type of power-line frequency meter composed of vibrating iron reed placed in alternating magnetic field
Last Answer : Vibrating Reed Type
Description : Type of power-line frequency meter device utilizing a principle of balancing an indicator needle at center of a scale using magnetic fields opposing each other.
Last Answer : magnetic type
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 : 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 : How will you calibrate an absolute pressure transmitter using vacuum manometer. Range 0-400mm abs ?
Last Answer : The procedure for calibration is as follows : Connect air supply to the transmitter. Connect a test gauge of 0-1.4 Kg/cm2 to the output. Connect Vacuum pump with tee off to the manometer. Apply 760 ... nearest ) and adjust zero. Apply 360 mm Vacuum adjust span. ( 760 - 360 = 400 mm abs. )
Description : This instrument measures temperatures by electric means, especially temperatures beyong the range of mercury thermometers
Last Answer : pyrometer
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 : 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 : What ammeter is mostly used in measuring high frequency currents?
Last Answer : thermocouple
Description : ___ ammeter is used to measure high-frequency currents.
Description : The frequency of rotation in some rotating machinery can be measured by a
Last Answer : stroboscope
Description : Tank-circuit frequency can be measured by
Last Answer : grid dip meter
Description : Which of the following bridges measures dc resistance?
Last Answer : Wheatstone bridge
Description : A dc bridge widely used for the accurate measurements of resistance
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 : 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 four-arm bridge. All arms of which are predominantly resistive; used for measuring resistance
Last Answer : Resistance Bridge and Wheatstone Bridge
Description : An AC bridge that measures inductance in terms of resistance and capacitance.
Last Answer : Owen's Bridge
Description : Resistance measuring instrument particularly used in determining the insulation resistance
Last Answer : Megger/Megaohmmeter
Description : Insulation resistance is measured by which meter?
Last Answer : megger
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 : In order to make an accurate measurement as possible, the internal resistance of a voltmeter must be
Last Answer : as high as possible
Description : An ammeter with an internal resistance of 50 ohm(s) is used to measure a current thorugh a lod resistor Rl = 1 kohm(s). Determine the percentage error of the reading due to ammeter insertion.
Last Answer : 50/(50+1k)*100 = 4.76%
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 : What is the maximum Vacuum ?
Last Answer : The maximum Vacuum = 760 mm Hg.
Description : The smallest change in a measured variable to which an instrument will respond.
Last Answer : resolution
Description : An electrodynamic meter used t measure power
Last Answer : wattmeter
Description : A bridge used to locate accidental grounds on communications and power lines
Last Answer : Murray Loop
Description : A device used to mechanically measure the output power of a motor
Last Answer : dynamometer
Description : What is a filter used for ?
Last Answer : The half wave and full wave signals are pulsating D . C . voltages. The use of such voltages is limited to charging batteries, running D. C. motors, and a few other applications. What we really ... voltage from a battery. To get a constant voltage from this, we can use a capacitor input filter.
Description : What is Zener Diode ? What is a voltage Regulator ?
Last Answer : The breakdown region of a p n diode can be made very sharp and almost vertical Diodes with almost vertical breakdown region are known as Zever Diodes. A Zener diodes operating in the breakdown ... VOLTAGE REGULATOR : The output remains constant despite changes in input voltage due to Zever effect.
Description : What is transistor ? What are the different types ?
Last Answer : A transistor is a three lagged semi conductor device. Basically a transistor means (transfer - resister). Whether the transistor is pnp or npn it resembles two diodes (back to back). The one of the left ... transistor : Emitter - Base - Forward Bias. Collector - Base - Reverse Bias.
Description : What is CB, CE and CC configuration ?
Last Answer : Buffer : A device or a circuit used to isolate two pt'ne circuits or stages. The emitter follows is a example of buffer. Alpha = IC / IE Beta = IC / IB
Description : How will you test a transistor with a multimeter. ?
Last Answer : 1. Emitter +ve of meter and Base -ve output = Low resistance 2. Emitter -ve of meter and base +ve output = High resistance. 3. Collector +ve and Base -ve output = Low. 4. Collector -ve and base +ve output = High. Emitter : Collector = High Resistance. PNP : Opposite Results.
Description : What is a thyristor ? What are its uses ?
Last Answer : A thyristor is a special kind of semi conductor device that uses internal feedback to produce latching action. Use : Used for controlling large amounts of load power in motors, heaters, lighting systems etc ... the latches like a open switch. This latch will always stay in open or close position.
Description : What does a transmitter output start from 3-15 psi or (0.2 - 1 Kg/Cm2) or 4 - 20 ma. etc. ?
Last Answer : The transmitter output stance from what is known as "live zero". This system has specific advantages : 1. The systems automatically alarms when the signal system becomes inoperative. ... transmitter operating, but transmitting a zero measurement and a failure, in the signal system.