A megger is basically a/an

A megger is basically a/an 

 (a) Moving iron type instrument (b) Moving coil type instrument (c) Hot wire instrument (d) Electrolytic instrument
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1 Answer

Answer :

Moving coil type instrument
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Related questions

Why using megger ? how to work megger.

Description : Why using megger ? how to work megger?

Last Answer : Megger is all about safety. You need to use cables that can meet your demand without putting anyone at risk through earth leakages. So Megger is all about testing cable insulation. You use an insulation tester resistant meter to make sure your cables are standard and properly insulated.

Draw construction of Megger and write operating principle of it.

Description : Draw construction of Megger and write operating principle of it.

Last Answer : Megger:  Working: Two coils the current coil and pressure coil are mounted at an angle on the same spindle and form the part of the moving system. These coils are connected to a small hand driven ... . When the instrument is not working the pointer may rest at any position on the dial.

Megger is used to test _________.

Description : Megger is used to test _________. A. Insulation B. Current C. Capacitance D. None of these

Last Answer : Megger is used to test Capacitance.

A megger is to measure insulation resistance of a cable. The cable should be connected to

Description : A megger is to measure insulation resistance of a cable. The cable should be connected to   (a) Battery (b) DC supply (c) AC supply (d) No supply  

Last Answer : majorly in DC as well as AC......but ans is Battery

To measure insulation resistance of equipments of voltage rating upto 440 V the megger generator must generate...

Description : To measure insulation resistance of equipments of voltage rating upto 440 V the megger generator must generate   (a) 220 V (b) 440 V (c) 500 V (d) None of these 

Last Answer : 500 V

A capacitor start, capacitor run single phase induction motor is basically a : -

Description : A capacitor start, capacitor run single phase induction motor is basically a : -  a) ac series motor b) dc series motor c) 2 phase induction motor d) 3 phase induction motor

Last Answer : A capacitor start, capacitor run single phase induction motor is basically a : -  2 phase induction motor 

Boosters are basically: -

Description : Boosters are basically: -  a) inductors b) capacitors c) transformers d) synchronous motors

Last Answer : Boosters are basically: - transformers

Inductance coils are basically designed for

Last Answer : Inductance coils are basically designed for High Q.

The reading at 'M' on the megger scale illustrated, is ____. EL-0044 A. 7.1 meg ohms B. 71 meg ohms C. .71 meg ohms D. 200,000,000 ohms

Description : The reading at 'M' on the megger scale illustrated, is ____. EL-0044 A. 7.1 meg ohms B. 71 meg ohms C. .71 meg ohms D. 200,000,000 ohms

Last Answer : Answer: A

When testing for blown fuses in a three-phase supply circuit to a motor, you should first ___________________. A. apply the megger across the tops of the line fuses B. apply an ammeter diagonally across the top of the first line fuse and the bottom of the third line fuse C. apply the voltage tester across the bottoms of the line fuses D. ensure the circuit is de-energized, and then use a continuity tester

Description : When testing for blown fuses in a three-phase supply circuit to a motor, you should first ___________________. A. apply the megger across the tops of the line fuses B. apply an ammeter diagonally across ... of the line fuses D. ensure the circuit is de-energized, and then use a continuity tester

Last Answer : Answer: D

The reading at 'M' on the megger scale shown in the illustration, is __________. EL-0044 A. 7.1 meg ohms B. .71 meg ohms C. 71 meg ohms D. 200,000,000 ohms

Description : The reading at 'M' on the megger scale shown in the illustration, is __________. EL-0044 A. 7.1 meg ohms B. .71 meg ohms C. 71 meg ohms D. 200,000,000 ohms

Last Answer : Answer: A

Which of the conditions listed will indicate the need to clean the insulation on the windings of an electric motor? A. Higher than normal operating temperature. B. Excessive vibration at normal speed. C. Sparking at the brushes. D. High megger readings.

Description : Which of the conditions listed will indicate the need to clean the insulation on the windings of an electric motor? A. Higher than normal operating temperature. B. Excessive vibration at normal speed. C. Sparking at the brushes. D. High megger readings.

Last Answer : Answer: A

The reading at 'Z' on the megger scale shown in the illustration is ____________. EL-0044 A. 30,000 ohms B. 300,000 ohms C. 3,000,000 ohms D. 30,000,000 ohms

Description : The reading at 'Z' on the megger scale shown in the illustration is ____________. EL-0044 A. 30,000 ohms B. 300,000 ohms C. 3,000,000 ohms D. 30,000,000 ohms

Last Answer : Answer: C

Routine maintenance of dry-type transformers should include ______________. A. preventing the entrance of water from broken pipe lines steam lines B. keeping protective surfaces and insulating bushings free of dirt and conductive debris C. periodic testing of insulation resistance with a megger D. all of the above

Description : Routine maintenance of dry-type transformers should include ______________. A. preventing the entrance of water from broken pipe lines steam lines B. keeping protective surfaces and insulating bushings free of ... debris C. periodic testing of insulation resistance with a megger D. all of the above

Last Answer : Answer: D

The reading at 'K' on the megger scale shown in the illustration, is ______________. EL-0044 A. 400 ohms B. 4,000 ohms C. 40,000 ohms D. 400,000 ohms

Description : The reading at 'K' on the megger scale shown in the illustration, is ______________. EL-0044 A. 400 ohms B. 4,000 ohms C. 40,000 ohms D. 400,000 ohms

Last Answer : Answer: D

The reading at 'C' on the megger scale illustrated, is ________. EL-0044 A. 200,000 ohms B. 2,000,000 ohms C. 20,000,000 ohms D. 200,000,000 ohms

Description : The reading at 'C' on the megger scale illustrated, is ________. EL-0044 A. 200,000 ohms B. 2,000,000 ohms C. 20,000,000 ohms D. 200,000,000 ohms

Last Answer : Answer: C

The reading at 'V' on the megger scale shown in the illustration, is __________. EL-0044 A. 40 meg ohms B. 0.40 meg ohms C. 4.0 kilo ohms D. 40,000 ohms

Description : The reading at 'V' on the megger scale shown in the illustration, is __________. EL-0044 A. 40 meg ohms B. 0.40 meg ohms C. 4.0 kilo ohms D. 40,000 ohms

Last Answer : Answer: D

The reading at 'P' on the megger scale shown in the illustration, is __________. EL-0044 A. 15 meg ohms B. 1.5 meg ohms C. 1.5 kilo ohms D. 150,000 ohms

Description : The reading at 'P' on the megger scale shown in the illustration, is __________. EL-0044 A. 15 meg ohms B. 1.5 meg ohms C. 1.5 kilo ohms D. 150,000 ohms

Last Answer : Answer: B

Which of the listed conditions could indicate the need for cleaning electrical insulation? A. Low ambient temperature B. Low operating temperature C. High dielectric strength D. Low megger readings

Description : Which of the listed conditions could indicate the need for cleaning electrical insulation? A. Low ambient temperature B. Low operating temperature C. High dielectric strength D. Low megger readings

Last Answer : Answer: D

Discharge switches are often located on hand-driven meggers. The purpose of these switches is to discharge capacitive charges stored in the _____________. A. megger hand generator B. megger movement coils C. tested equipment while conducting test D. tested equipment after testing

Description : Discharge switches are often located on hand-driven meggers. The purpose of these switches is to discharge capacitive charges stored in the _____________. A. megger hand generator B. megger movement coils C. tested equipment while conducting test D. tested equipment after testing

Last Answer : Answer: D

The need for insulation cleaning may be determined by _____. A. visual inspection for dirt accumulation B. high megger readings C. low operating temperature D. the time period since the last cleaning

Description : The need for insulation cleaning may be determined by _____. A. visual inspection for dirt accumulation B. high megger readings C. low operating temperature D. the time period since the last cleaning

Last Answer : Answer: A

If the pointer on a megger fails to return to 'zero' when not being used, the _____________. A. megger is out of calibration B. megger is operating normally C. hairsprings are burned out D. pointer probably stuck in that position

Description : If the pointer on a megger fails to return to 'zero' when not being used, the _____________. A. megger is out of calibration B. megger is operating normally C. hairsprings are burned out D. pointer probably stuck in that position

Last Answer : Answer: B

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

A useful instrument for checking A.C. motor performance by measuring possible unbalanced currents is the _____________. A. hand or battery-operated megger B. vibrating-reed frequency meter C. hook-on voltmeter-ammeter D. D'Arsonval iron-vane probe

Description : A useful instrument for checking A.C. motor performance by measuring possible unbalanced currents is the _____________. A. hand or battery-operated megger B. vibrating-reed frequency meter C. hook-on voltmeter-ammeter D. D'Arsonval iron-vane probe

Last Answer : Answer: C

Electrical machinery insulation will break down more rapidly due to _________________. A. low loading of motors and generators B. frequent megger testing C. high temperatures and vibration D. high operating frequencies

Description : Electrical machinery insulation will break down more rapidly due to _________________. A. low loading of motors and generators B. frequent megger testing C. high temperatures and vibration D. high operating frequencies

Last Answer : Answer: C

Routine maintenance of a ship's service alternator should include ______________. A. changing the pedestal bearing insulation yearly B. megger testing of all rectifying diodes C. lubricating excitation slip rings D. periodic cleaning of the air filters or screens

Description : Routine maintenance of a ship's service alternator should include ______________. A. changing the pedestal bearing insulation yearly B. megger testing of all rectifying diodes C. lubricating excitation slip rings D. periodic cleaning of the air filters or screens

Last Answer : Answer: D

A suspected 'open' in a motor field can be tested by using a/an ____________. A. potentiometer B. megger C. wattmeter D. ammeter

Description : A suspected 'open' in a motor field can be tested by using a/an ____________. A. potentiometer B. megger C. wattmeter D. ammeter

Last Answer : Answer: B

To determine if a stator coil is grounded, you should use a/an _____________. A. ammeter B. ground detection lamp C. magneto D. megger

Description : To determine if a stator coil is grounded, you should use a/an _____________. A. ammeter B. ground detection lamp C. magneto D. megger

Last Answer : Answer: D

If the pointer fails to return to zero when a megger is disconnected, the _____________. A. pointer is stuck B. hair springs are burned out C. megger is out of calibration D. megger is operating normally

Description : If the pointer fails to return to zero when a megger is disconnected, the _____________. A. pointer is stuck B. hair springs are burned out C. megger is out of calibration D. megger is operating normally

Last Answer : Answer: D

The electrician reports to you that he has obtained low (but above 1 megohm) megger readings on the windings of a deck winch motor. Upon checking the records of that motor, you find the readings have consistently been at that level for the last six yea A. motor be replaced B. windings be dried C. windings be cleaned D. readings are acceptable

Description : The electrician reports to you that he has obtained low (but above 1 megohm) megger readings on the windings of a deck winch motor. Upon checking the records of that motor, you find the readings have ... yea A. motor be replaced B. windings be dried C. windings be cleaned D. readings are acceptable

Last Answer : Answer: D

A generator has been exposed to water and is being checked for its safe operation. Therefore, it is necessary to _______________. A. check for shorted coils with a growler B. take moisture readings with a hydrometer C. test insulation values with a megger D. ground the commutator, or slip rings and run it at half load for 12 hours

Description : A generator has been exposed to water and is being checked for its safe operation. Therefore, it is necessary to _______________. A. check for shorted coils with a growler B. take moisture readings with a ... a megger D. ground the commutator, or slip rings and run it at half load for 12 hours

Last Answer : Answer: C

As shown in the illustration, what maintenance would be required of the circuit components? EL-0058 A. Change out both 'C' units monthly. B. Clean the glass surrounding 'E1' & 'E2' as needed. C. File the points at the upper end of 'G' every six months. D. Take megger readings on 'E1' & 'E2' windings quarterly.

Description : As shown in the illustration, what maintenance would be required of the circuit components? EL-0058 A. Change out both 'C' units monthly. B. Clean the glass surrounding 'E1' & 'E2' as needed. C. File ... upper end of 'G' every six months. D. Take megger readings on 'E1' & 'E2' windings quarterly.

Last Answer : Answer: B

As a general rule, the first troubleshooting action to be taken in checking faulty electric control devices is to _____________. A. draw a one line diagram of the circuitry B. test all fuses and measure the line voltage C. take megger readings D. insulate the apparatus from ground

Description : As a general rule, the first troubleshooting action to be taken in checking faulty electric control devices is to _____________. A. draw a one line diagram of the circuitry B. test all fuses and measure the line voltage C. take megger readings D. insulate the apparatus from ground

Last Answer : Answer: B

Different between megger and contact resistance meter?

Description : Different between megger and contact resistance meter?

Last Answer : Answers: Megger used to measure cable resistance, conductor continuity, phase identification where as contact resistance meter used to measure low resistance like relays ,contactors.

What is the difference between megger test equipment and contact resistance meter test instruments?

Description : What is the difference between megger test equipment and contact resistance meter test instruments?

Last Answer : Megger test equipment used to measure cable electric resistance, conductor continuity, phase identification. Contact resistance meter test instruments used to measure low resistance like relays, contactors.

What is Megger?

Description : What is Megger?

Last Answer : The megohmmeter, commonly called a megger for short, is used to measure very high resistance values. It is primarily used to test the insulation of conductors. To measure high resistance values, a high voltage is applied, either by the use of a handcranked generator or electronic power supply. 

Why megger value of 1 minute is less than 10-minute value?

Description : Why megger value of 1 minute is less than 10-minute value?

Last Answer : After 10 minutes the high voltage applied make the molecules such a way that stabilised in a good insulation. If insulation is weak it leads to more leakage current due to high potential. 

Why guard connection is given for megger?

Description : Why guard connection is given for megger?

Last Answer : For true measurement of IR value of HV to earth of a transformer, connect line to HV, earth to transformer tank and guard to LV. Therefore leakage current from HV to LV is not included.  

Different between megger and contact resistance meter?

Description : Different between megger and contact resistance meter?

Last Answer :  Megger used to measure cable resistance, conductor continuity, phase identification where as contact resistance meter used to measure low resistance like relays, contactors.

List the four safety precautions observed when using a megger.

Description : List the four safety precautions observed when using a megger.

Last Answer : a. Use meggers for high-resistance measurement only. b. Never touch the test leads when the handle is being cranked. c. Deenergize and discharge the circuit completely before connecting a megger. d. Disconnect the item being checked from other circuitry, if possible, before using a megger

What is a normal indication on a megger when checking insulation?

Description : What is a normal indication on a megger when checking insulation?

Last Answer : Infinity.

What is the procedure for using a megger to check the insulation of a conductor?

Description : What is the procedure for using a megger to check the insulation of a conductor?

Last Answer : Connect one lead to the insulation and one lead to the conductor. Turn the handcrank until it starts to slip. Note the reading

What is the primary use of a megger?

Description : What is the primary use of a megger?

Last Answer : To measure high resistance.

What is the normal indication on a megger when checking insulation?

Description : What is the normal indication on a megger when checking insulation?

Last Answer : infinity

Why is a Megger used for insulation test and not a multi meter?

Description : Why is a Megger used for insulation test and not a multi meter?

Last Answer : With a megger,a voltage of not less than 500 volts DC is used for testing the insulation resistance of windings. With a multi-meter, the voltage used is not more than 3-volts DC. Megger uses high impedance testing and is therefore more accurate than a multi-meter

Megger Practical

Description : Megger Practical

Last Answer : Practical Significance Many a times it is essential to measure insulation resistance of cable before installation as well as whenever power breakdown in a shop or section of industry occurs. The value of ... Note down the reading in observation table. 6. Repeat the steps for other conductors.

Explain with neat sketch the construction and working principle of megger.

Description : Explain with neat sketch the construction and working principle of megger.

Last Answer : Megger: Construction of Megger : Two coils: the current coil and pressure coil are mounted at an angle on the same spindle and form the part of the moving system. These coils are ... force produces a torque that is used to deflect the pointer of the device which gives some reading.