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Recent questions tagged used

1 answer 32 views

State functions of ; i) Cable box ii) Guard wire iii) Shackle insulator iv) Stay wire used in service connection

asked Sep 20, 2018 in Industry Electrical Systems-I by Shimroz123
1 answer 78 views

State starters used for i) 3-Ph squirrel cage induction motor (3HP) ii) D.C. motor 

asked Sep 18, 2018 in Industry Electrical Systems-I by Shimroz123
1 answer 10 views

Give the classification of the errors used in measuring instrument & state the reason for their occurrence.

asked Sep 6, 2018 by Shimroz123
1 answer 12 views

Name the material used for :- (i) Moving coil (ii) Permanent magnet in PMMC instrument.

asked Sep 6, 2018 by Shimroz123
1 answer 2 views

State the use of shunt and series resistance used in extension of meter.

asked Sep 6, 2018 by Shimroz123
1 answer 18 views

State the material used for moving coil and former for PMMC instruments. 

asked Sep 5, 2018 by Shimroz123
1 answer 110 views

Why common emitter configuration is commonly used?

asked Sep 4, 2018 by Shimroz123
1 answer 50 views

Which of the following device is used for coupling microwave energy?  A) Resonator B) Waveguide C) Loop D) Antenna

asked Jun 18, 2018 in Electronics Engineering by Shimroz123
1 answer 55 views

Which of the following thyristors can be used for high frequency of operation? A) TRIAC B) DIAC C) SCR D) GTO 

asked Jun 18, 2018 in Thyristor by Shimroz123
2 answers 13 views
1 answer 24 views

Light triggering is mainly used in

asked May 8, 2018 in Switchgear And Protection by Shimroz123
1 answer 138 views

Shunt compensation in an EHV line is used to (A) Improve stability. (B) Improve the voltage profile. (C) Reduce the fault level. (D) Substitute for synchronous phase modifier.

asked May 8, 2018 in Power system by Shimroz123
1 answer 8 views

Taskbar is used for (A) Navigation program (B) Switching between program (C) Start a program (D) All of above

asked May 8, 2018 in Computer Engineering by Shimroz123
1 answer 8 views

Wave trap is used to trap waves of:  (A) Power frequencies (B) Higher frequencies entering generator or transformer units (C) All of the above (D) None of the above

asked May 8, 2018 in Electrical Engineering by Shimroz123
1 answer 53 views

A relay used for protection of motors against overload is :  (A) Impedance relay (B) Electromagnetic attraction type (C) Thermal relay (D) Buchholz's relay

asked May 8, 2018 in Switchgear And Protection by Shimroz123
1 answer 26 views

Earthing switch is used for?  (A) Measuring of safety voltage (B) Protection of equipment from ground faults (C) Discharging residual energies (D) All of the above 

asked May 8, 2018 in Switchgear And Protection by Shimroz123
1 answer 28 views

A _________ is used to measure the stator % winding temperature of the generator.  (A) Thermocouple (B) Pyrometer (C) Resistance thermometer (D) Thermometer

asked May 8, 2018 in Electrical Machine by Shimroz123
1 answer 8 views

As per Electricity Act, ____________means any line which is used for carrying electricity for any purpose.  (A) Electric line (B) Transmission line (C) All of the above (D) None of the above

asked May 8, 2018 in Electrical Engineering by Shimroz123
1 answer 48 views

Which circuit is used as amplitude comparator?

asked May 3, 2018 in Power Electronics by Shimroz123
1 answer 13 views

Auto reclosing is used in case of

asked May 3, 2018 in Switchgear And Protection by Shimroz123
1 answer 73 views

The self GMD method is used to evaluate

asked May 3, 2018 in Electrical Engineering by Shimroz123
2 answers 38 views

The IC chips, used in computers, is made of  (1) Iron oxide (2) Silicon (3) Graphite (4) Silica

asked May 1, 2018 in Computer Engineering by Shimroz123
1 answer 945 views

The motor used for electric traction is  (1) D.C. shunt motor (3) D.C. series motor  (2) D.C. compound motor (4) Synchronous motor

asked May 1, 2018 in Utilization of electrical energy by Shimroz123
1 answer 366 views

A negative sequence relay is used for protection of  (1) Generator (3) Motor (2) Transformer (4) Long Transmission lines

asked May 1, 2018 in Switchgear And Protection by Shimroz123
1 answer 24 views

Spot welding is used for (1) Thin metal (3) Castings only (2) Rough and irregular surface (4) Thick sections

asked Apr 30, 2018 in Utilization of electrical energy by Shimroz123
1 answer 23 views

The material used in liquid fuses is  (1) SF6 (3) carbon tetra chloride (2) distilled water (4) transformer oil

asked Apr 30, 2018 in Switchgear And Protection by Shimroz123
1 answer 23 views

IDMT relays are used to protect the transformer against :  (A) Internal short -circuits (B) Open circuits (C) External short circuits (D) Oil leakage

asked Apr 30, 2018 in Switchgear And Protection by Shimroz123
1 answer 17 views

Which of the following gates can be used to realize all possible combinational logic functions?  (i) OR gate (ii) NOR gate (iii) Exclusive OR gate (iv) NAND gate (v) AND gate  (A) (iii), (iv) and (v)  (B) (i), (iii) and (iv)  (C) (ii) and (iv)  (D) (i) and (v)

asked Apr 30, 2018 in Digital Electronics by Shimroz123
1 answer 17 views

A differentiator is not usually used in control system, because it : - (A) reduces damping  (B) increases error  (C) reduces gain margin  (D) increases input noise

asked Apr 30, 2018 in Control System by Shimroz123
1 answer 23 views

The electrode rod used for welding uses a coating on it 

asked Apr 29, 2018 in Utilization of electrical energy by Shimroz123
1 answer 16 views

A dummy strain gage is used in a quarter bridge strain gage circuit to :  (A) compensate for changes in temperature and lead wire resistance  (B) produce more output voltage from the bridge  (C) increase the sensitivity of the bridge  (D) compensate lead wire resistance only

asked Apr 29, 2018 in Electrical Measurements and Instrumentation by Shimroz123
1 answer 16 views

The range of frequencies used in induction heating is :  (A) 0-25 Hz  (C) less than 200 Hz  (B) 50 to 100 Hz  (D) more than 1 kHz

asked Apr 29, 2018 in Utilization of electrical energy by Shimroz123
1 answer 21 views

Peterson coil is used for :  (A) shunt compensation of lines (B) grounding of system neutral (B) reduce fault currents (D) connecting interconnected systems

asked Apr 29, 2018 in Electrical Machine by Shimroz123
1 answer 10 views

Stepper motors are used in  (1) printers (2) lifts (3) amplifiers (4) oscillators

asked Apr 29, 2018 in Electrical Machine by Shimroz123
1 answer 17 views

In a dc machine, interpoles are used to  (1) neutralize the effect of armature reaction in the interpolar region (2) generate more induced emf in the armature (3) avoid interference of the armature flux with the main -field flux (4) reduce the demagnetizing effect of armature reaction

asked Apr 29, 2018 in Electrical Machine by Shimroz123
1 answer 18 views

Piezoelectric Transducer is used to measure  (1) displacement (2) resistance (3) current (4) temperature

asked Apr 29, 2018 in Electrical Measurements and Instrumentation by Shimroz123
1 answer 58 views

An unshielded moving iron voltmeter is used to measure the voltage in an AC circuit. The stray DC magnetic field having a component along the axis will be  (1) unaffected (2) decreased (3) increased (4) either decreased or increased depending on the direction of the DC field

asked Apr 29, 2018 in Electrical Measurements and Instrumentation by Shimroz123
1 answer 28 views

The storage battery generally used in electric power stations is  (1) zinc carbon battery (2) lead acid battery (3) nickel cadmium battery (4) lithium -ion battery

asked Apr 29, 2018 in Power system by Shimroz123
1 answer 27 views

Series capacitive compensation in EHV transmission line is used to

asked Apr 29, 2018 in Power system by Shimroz123
1 answer 21 views

Which of the following is used for thermoelectric cooling? A) Peltier effect B) Seebeck effect C) Both A and B D) None of these

asked Apr 29, 2018 in Electrical Engineering by Shimroz123
1 answer 31 views

Which of the following elements are used as dopants in silicon or germanium semiconductors? A) Antimony B) Phosphorus C) Arsenic D) All the above

asked Apr 29, 2018 in Electrical Engineering by Shimroz123
1 answer 12 views

The iron alloy, ALNICO is mainly used to make ________ A) Temporary magnets B) Permanent magnets C) Transmission lines D) None of these

asked Apr 29, 2018 in Electrical Engineering by Shimroz123
1 answer 106 views

Which of the following can be used to measure the capacitance of a capacitor? A) Rheostat B) Schering bridge C) Wheatstone bridge D) None of these

asked Apr 29, 2018 in Electrical Measurements and Instrumentation by Shimroz123
1 answer 25 views

The frequencies and voltage used in Dielectric heating are (A) 10 – 30 MHz, upto 25 kV (B) 50 – 60 Hz, upto 25 kV (C) 10 – 30 MHz, upto 100 V (D) 50 – 60 Hz, 110 V – 230 V

asked Apr 28, 2018 in Utilization of electrical energy by Shimroz123
1 answer 22 views

Phantom loading for testing of energy meter is used (A) to isolate the current and potential circuits (B) to increase power loss during testing (C) for meters having low current ratings (D) to test meters having a large current rating for which loads may not be available

asked Apr 28, 2018 in Electronics Engineering by Shimroz123
1 answer 13 views

The ALE line of an 8085 microprocessor is used to (A) latch the output of an I/O instruction into an external latch. (B) deactivate the chip-select signal from memory devices. (C) find the interrupt enable states of the TRAP interrupt. (D) latch the 8 bits of address lines AD7-AD0 into an external latch.

asked Apr 28, 2018 in Digital Electronics by Shimroz123
1 answer 195 views
1 answer 13 views

Series reactors are used to

asked Apr 26, 2018 in Switchgear And Protection by Shimroz123
1 answer 22 views

ln a minimum oil circuit breaker the oil is used

asked Apr 26, 2018 in Switchgear And Protection by Shimroz123
1 answer 39 views

Regulating-transformers are used in power systems for control of

asked Apr 26, 2018 in Switchgear And Protection by Shimroz123

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