The zero-adjust control in an analog type ohmmeter is used to

Description : Before measuring an unknown resistance with an ohmmeter, you should _____________. A. adjust the meter's pointer to mid-scale B. short the test leads and calibrate the meter reading to 'zero' C. change the meter's batteries D. center the meter's pointer at infinity

Last Answer : Answer: B

Prior to using an analog type ohmmeter, the leads are purposely shorted together. Which of the following actions should be taken if, when adjusting to 'zero' ohms, the indicating needle can not be returned to 'zero' on the scale? A. The lead clips should be replaced. B. The batteries should be replaced. C. The test reading should be added to each final reading. D. The test reading should be subtracted from each final reading.

Description : Prior to using an analog type ohmmeter, the leads are purposely shorted together. Which of the following actions should be taken if, when adjusting to 'zero' ohms, the indicating needle can not be ... be added to each final reading. D. The test reading should be subtracted from each final reading.

Last Answer : Answer: B

Majority of analog measuring instrument utilizes one of the following effects.

Description : Majority of analog measuring instrument utilizes one of the following effects.

Last Answer : magnetic effect

A force in analog instrument which quickly brings the moving system to rest in its final position.

Description : A force in analog instrument which quickly brings the moving system to rest in its final position.

Last Answer : damping force

A moving system force in analog instruments which ensures that the deflection of the pointer for a given value of measured quantity always has the same value

Description : A moving system force in analog instruments which ensures that the deflection of the pointer for a given value of measured quantity always has the same value

Last Answer : controlling force

Which of the following forces does not act on the moving systems of analog instruments?

Description : Which of the following forces does not act on the moving systems of analog instruments?

Last Answer : an electrostatic force

Which of the listed statements is correct when using an analog multimeter as an ohmmeter? A. The pointer should be adjusted to zero each time a new resistance range is selected. B. The pointer will move to infinity when the meter is not in use. C. Ohmmeters are not sufficiently sized to measure conductor insulation resistance. D. All of the above.

Description : Which of the listed statements is correct when using an analog multimeter as an ohmmeter? A. The pointer should be adjusted to zero each time a new resistance range is selected. B. The ... C. Ohmmeters are not sufficiently sized to measure conductor insulation resistance. D. All of the above.

Last Answer : Answer: D

When the pointer of an analog ohmmeter reads close to zero, the resistor being measured is?

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

Pointer of an analog ohmmeter reading close to zero, indicates the resistor being measured is:

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

How will you check zero of a level D.P. transmitter while is line ?

Description : How will you check zero of a level D.P. transmitter while is line ?

Last Answer : ١. Close both the isolation valves. ٢. Open the vent valve on L.P. leg and H.P. leg drain. ٣. Check and adjust zero if necessary.

What is absolute zero pressure ?

Description : What is absolute zero pressure ?

Last Answer : Absolute zero = 760 mm Hg Vacuum.

How do you do a zero check on a D.P. transmitter ?

Description : How do you do a zero check on a D.P. transmitter ?

Last Answer : Close one of the valve either H.P. or L.P. open the equalizing valve. The O/P should read zero.

Before measuring an unknown resistance with an ohmmeter, you should _____________. A. adjust the meter's pointers to mid-scale B. change the meter's batteries C. center the meter's pointer at infinity D. short the test leads and calibrate the meter

Description : Before measuring an unknown resistance with an ohmmeter, you should _____________. A. adjust the meter's pointers to mid-scale B. change the meter's batteries C. center the meter's pointer at infinity D. short the test leads and calibrate the meter

Last Answer : Answer: D

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 remains there C. the meter deflects to a low resistance value and slowly increases towards infinity D. the meter deflects to a low resistance value and increases rapidly to a higher value, but stays fairly low

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

What is feed back control ? What is feed forward control ? Discuss its application ?

Description : What is feed back control ? What is feed forward control ? Discuss its application ?

Last Answer : Feed back control: Feed back control involves the detection of the controlled variable and counteracting of charges its it's value relative to set point, by adjustment of a manipulated ... controller for a particular process application, two factors time and gain must be considered.

What is Furnace Draft control ?

Description : What is Furnace Draft control ?

Last Answer : Balanced draft boilers are generally used negative furnace pressure. When both forced draft and induced draft are used together, at some point in the system the pressure will be the same as that of atmosphere. ... have is a very slight (about 0.1" H20 ) negative pressure of the top of furnace.

In an oscilloscope, ___ adjusts the brightness of the spot by chaning the current on the control grid.

Description : In an oscilloscope, ___ adjusts the brightness of the spot by chaning the current on the control grid.

Last Answer : intensity control

When troubleshooting motor controllers, a shorted relay or contactor coil is often indicated by _______________. A. a resistance reading of 'infinity' on an ohmmeter B. charred insulation and/or a blown control fuse C. a reading of 'zero' on a megger from one of the coil's leads to ground D. a higher-than-normal voltage reading across the winding

Description : When troubleshooting motor controllers, a shorted relay or contactor coil is often indicated by _______________. A. a resistance reading of 'infinity' on an ohmmeter B. charred insulation and/or a blown ... of the coil's leads to ground D. a higher-than-normal voltage reading across the winding

Last Answer : Answer: B

What type of sensing element would you use to measure very low temperature ?

Description : What type of sensing element would you use to measure very low temperature ?

Last Answer : The sensing element used for measuring very low temperature is R. T. D. ( Resistance Temperature Detector )

Induction type instruments are mostly used as ___

Description : Induction type instruments are mostly used as ___

Last Answer : watt-hour meter

Type of power-line frequency meter composed of vibrating iron reed placed in alternating magnetic field

Description : Type of power-line frequency meter composed of vibrating iron reed placed in alternating magnetic field

Last Answer : Vibrating Reed Type

Type of waveform generated by the sweep generator of the CRT

Description : Type of waveform generated by the sweep generator of the CRT

Last Answer : sawtooth

A type of photometer used to measure reflection.

Description : A type of photometer used to measure reflection.

Last Answer : reflectometer

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.

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

Generally, oscilloscope uses what type of deflection?

Description : Generally, oscilloscope uses what type of deflection?

Last Answer : electrostatic deflection

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.

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

Which is the best type of ammeter movement?

Description : Which is the best type of ammeter movement?

Last Answer : D'Arsonval

What is the most common type of meter movement?

Description : What is the most common type of meter movement?

Last Answer : D' Arsonval

Dynamometer type instrument can be used for

Description : Dynamometer type instrument can be used for

Last Answer : both dc and ac works

What type of instrument is the watt-hour meter?

Description : What type of instrument is the watt-hour meter?

Last Answer : an integrating

What is a filter used for ?

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.

What is Zener Diode ? What is a voltage Regulator ?

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.

What is transistor ? What are the different types ?

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.

What is CB, CE and CC configuration ?

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

How will you test a transistor with a multimeter. ?

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.

What is a thyristor ? What are its uses ?

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.

What does a transmitter output start from 3-15 psi or (0.2 - 1 Kg/Cm2) or 4 - 20 ma. etc. ?

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.

What are Intrinsically safe system ?

Description : What are Intrinsically safe system ?

Last Answer : Intrinsic safety is a technique for designing electrical equipment for safe use in locations made hazardous by the presence of flammable gas or vapors in air. "Defn. :" Intrinsically safe circuit is ... , unfortunately, been adopted in all countries. However two sets of codes in common use are.

What is the difference the a wheatstone bridge and a potentiometer ?

Description : What is the difference the a wheatstone bridge and a potentiometer ?

Last Answer : The difference between a potentiometer and a wheatstone bridge measuring instrument is that potentiometer is a voltage measuring instrument and wheatstone bridge is a current measuring instrument.

What is the specialty of thermocouples lead wires ?

Description : What is the specialty of thermocouples lead wires ?

Last Answer : They should be of the same material as the thermocouple.

What are skin temperature thermocouples ?

Description : What are skin temperature thermocouples ?

Last Answer : Skin thermocouples are those which are directly connected to the process without any thermowell. Used for measuring the skin temperature of heaters furnaces, flue gas etc.

How will you calibrate a temp. recorder using a potentiometer ?

Description : How will you calibrate a temp. recorder using a potentiometer ?

Last Answer : Connect the potentiometer output to the input of temp. recorder. 1. Connect the ( +ve ) to the ( +ve ) and ( -ve ) to the ( -ve ). 2. If ambient compensation is provided ... ambient temp. millvolts to the corr. input millvolts measured. Find out from the chart for the corresponding temperature.

Why are Thermowells used ?

Description : Why are Thermowells used ?

Last Answer : In numerous application it is neither desirable nor practical to expose a temperature sensor directly to a process material. Wells are therefore used to protect against damage corrosion, erosion, abrasion and high pressure processes. A ... 3. Monel. 4. Alloy steal. 5. Hastelloy 'C'.

Why is a converter used in a temp. recorder ?

Description : Why is a converter used in a temp. recorder ?

Last Answer : The converter is designed to convert D. C. input voltage into an A. C. input voltage proportional in amplitude to the input.

What is burnout feature ? Explain.

Description : What is burnout feature ? Explain.

Last Answer : Burnout provides the warning feature of driving indicator the end of scale if the input circuit should open. A burnout resistor is provided which develops a voltage drop between the measuring circuit and the ... Upscale burnout : R value 10 M Downscale burnout : R value 2.2 M

anonymous · Answer 1 · 2021-08-17T16:18:02+0000

compensate for the
differing internal battery
voltage

The zero-adjust control in an analog type ohmmeter is used to

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