A relay in which the measurement is performed by a stationary circuit and which has no moving parts is called

For high voltage ac circuit breakers, the rated short circuit current is passed for ___ seconds

Which of the following is not a type of contractor for circuit breakers?

Interrupting medium in a contactor for circuit breakers may be

Which of the following circuit breakers has the lowest voltage range?

Which of the following materials is not used in extinguishingthe arc in case of a circuit breaker?

The transient voltage that appears across the contacts of a circuit breaker at the instant of arc extinction is called

A relay used for protection of motors against overload

The number of cycles in which a high speed circuit breaker can complete its operation is

A material best suited for manufacturing of fuse wire is

In a circuit breaker, the current which exist at the instant of contact separation is called

A Merz-Price protection is suitable for

Interrupting capacity of a circuit breaker is usually expressed in

Which of the following contact point metals has the highest melting point?

Sparking occurs when a load is switched off because the circuit has

Sparking between contacts can be reduced by

An automatic device that operates at present values is called

The power factor of the arc in a circuit breaker is

Flame proofs switch gears are usually preffered in

Air used un air blast circuit breaker

In a circuit breaker, the time duration from the instant of the fault to the instant of energizing of the trip coil is known as

In a circuit breaker, the time duration from the instant of the fault to the extinction of the arc is known as

In a circuit breaker, the time duration from the instant of the fault to the instant of closing of contacts is known as

For a high speed circuit breaker the total clearing time is nearly

For a circuit breaker, "break" time is

Which relay is used for feeders?

Which relay is used for transmission line?

The value of fault current depends on

The advantage of grounding the neutral is

Over voltage surges in a power system may be caused by

The protection against over voltage due to lightning is provided by

A fuse is normally a

Which of the following is a conducting medium for electric current?

In a circuit breaker the contact space is ionized by

Which of the following are air break switching devices?

Which of the following is the demerit of SF6 circuit breaker?

The material used for bus bars should have

Fuse in motor circuit provides

The disadavantage of an underground system is

Series reactors are installed at strategic locations of a power system in order to

Which is the worst fault for a power system?

The rating of a circuit breaker is generally determine on the basis of

A balanced 3-phase system consists of

When 'a' is the operator, then 1+a+a2 =

When 'a' is the operator, then a3 =

The operation of a distance relay is based on the measurement of any of the following EXCEPT

In distance relay the operation depends upon

MHO relay is used for

Reactance relays are used for phase fault in

The relay preferred for phase fault along long transmission line is

Earth faults relay are invariably

A thermal protection circuit provides protection against

The purpose of using reactors in electrical circuits is to

Reactors for the protection of tranmission lines are connected in

A three-phase power transformer is provided with star-delta connections. In order to protect against fault, the connections for current transformers should be in

The most common type of three phase in unsymmetrical fault is

A relay performs the function of

The relay operating coil is supplied through

A MHO relay is

When all the three phase are short circuited it gives rise to

What will happen if a short circuit occurs on the system?

The most common type of fault on the overhead transmission line is

Which fault gives rise to symmetrical fault currents?

A 1000 KVA transformer with 5% reactance will have a reactance of 10% at

Short circuit kVA is obtained by multiplying the base kVA by

Reactors are used at various points in the power system to

The use of reactors permits installation of circuit breakers of the

The p.u impedance value of an alternator corresponding to base values of 13.2 kV and 30 MVA is 0.2 p.u. The p.u value for the base values 13.8 kV and 50 MVA will be

Base impedance of the power system is given by

HRC fuse provide best protection against

Ground wire is used to

The grounding is generally done at the

In a balanced three phase system, negative and zero phase sequence currents are

The positive and negative sequence impedanceof a transmission line are

On the occurrence of an unsymmetrical fault which sequence component is always more than the negative sequence component?

The operator 'a' rotates the vector in the anticlockwise direction by

Which of the following equation is correct?

The positive sequence component of voltage at the point of fault zero when it is a

When a fault occurs on the system a circuit breaker

Which statement is correct

A relay performs the function of

The relay operating coil is supplied through

Most of the relays on service on electric power system are

Back up protection is generally employed for protection against

The main function of under voltage protective device generally used with a motor starter is

Which of the following methods is the best for improving the transient stability?

An alternator having an induced e.m.f of 1.6 p.u is connected to an infinite bus of 10 p.u. If the bus bar has reactance of 0.6 p.u and alternator has reactance of 0.2 p.u, the maximum power that can be transferred is given by

Electrostatic effect for producing deflecting torque is used in

The disadavantage of gravity control method is that, it is

Moving iron instruments are

Moving iron instruments can be used on

The meter constant of energy meter is given by

Megger is a combination of

On testing an electric iron on megger, the reading of the megger is infinity. This indicates

A man holds both the terminals of a 500V megger, but still safe due to

Which of the following meters has the best accuracy?

Threshold of sensitivity with respect to instruments is

Megger is an instrument to measure

What will happen if a voltmeter is connected like an ammeter in series to the load?

A C.T is overloaded when

The errors in C.T are mainly due to

Induction type wattmeter operation is based on

Inductance is measured by

Schering bridge is used to measure

Which bridge is used to determine frequency?

In a low power factor wattmeter the compensating coil is connected

For measuring a very high resistance we should use

In a megger controlling torque is provided by

A phase shifting transformer is used in conjunction with an A.C potentiometer usually has a

The stator of phase shifting transformer for use in conjunction with an A.C potentiometer usually has a

The desirable static characteristics of a measuring system are

The ratio of maximum displacement deviation to full scale deviation of the instrument is called

Operating torques in analogue instruments are

Commonly used instruments in power system measurement are

Damping of the Ballistic galvanometer is made small to

Alternating current is measured by

Most sensitive galvanometer is

In an energymeter braking torque is produced to

Two holes in the disc of energy meter are drilled at the opposite sides of the spindle to

To measure radio frequency, the suitable frequency meter is

Potentiometer is a

In instruments the term 'articial aging' is associated with

Which of the following instruments cannot be used for the measurement of A.C as well D.C quantities?

______ instrument is free from hysteresis and eddy current errors

The readings of a dynamometer type wattmeter can be highly erratic at

A dynamometer type wattmeter has

Which of the following cannot be measured by multimeters?

______ instrument will draw least current from the circuit in which it is incorporated

Which of the following methods is used to shield a dynamometer type wattmeter against stray fields?

______ type instrument has identical calibration for A.C as well as D.C values?

A wattmeter will be free from the effects of power factor and frequency variations in case

In the measurement of power by two wattmeter method, when the readings of the two wattmeters are equal and opposite, it can be concluded that power factor is

_____ give the value of the quantity to be measured in terms of the constants of the instruments and their direction only.

A portable instrument is likelyto have _____ damping

When the damping of an instrument is adjusted to enable the pointer to rise quickly to its deflected position without overshooting, in that case the instrument is said to be

Thermal efficiency of a gas turbine plant as compared to Diesel engine plant is

Reflectors of a nuclear reactor are made up of

The function of a moderator in a nuclear reactor is

_______ is the most commonly used moderator

In a pressurized water reactor (PWR)

Which cycle would you consider for a thermal power plant?

Which of the following property of coal has major influence on the design and operation of a steam power plant?

Whichof the following plant has the highest cost per MW installed?

The cost of transmission and distribution will be least for which type of power plant

Which of the following power plant has least expenditure on transportation of fuel?

Which of the following power plant has least overall efficiency?

Which of the following is the major consideration while selecting the site for a nuclear power plant?

A moderator is used to

A moderator should have

Which of the following material can be used as a moderator in a nuclear power plant?

The reactor in which fissionable fuel produced is more than the fuel consumed, is known as

Which of the following material is not used as moderator?

Plastics on thin layers of metals are used in nuclear plants

In a nuclear power plant which of the following is used to slow down the fast neutrons

Control rods for nuclear reactors are made of

Which of the following plants will have the highest capital cost?

The suitable turbine used for harnessing tidal power is

Which of the following power stations is mainly used to cover peak loads on the system?

The combined operation of thermal power plant and MHD plant results in efficiency in the range of

Kaplan turbine is

Which of the following generating stations has minimum running cost while in operation?

Which of the following methods of generataing electric power from sea water is more advantageous?

Nuclear reactor generally employs

A gas turbine power plant usually suits for

Which power plant cannot have single unit of 100 MW?

Which of the following plant is expected to have the longest expected life?

Air will not be the working substance in a

A thermal power station was designed to burn coal containing 12% ash. When the plant actually started operating coal having 22% ash was made available. Which unit of the plant will need major modifications?

Which of the following plants will take least time in starting from cold conditions to full load operation?

During load shedding

For the same plant size, initial cost of which plant is the highest?

In a steam power plant which components needs maximum maintenance?

For under water movement, submarines are given supply by

Ships are generally run by

Direct conversion of heat into electrical energy is possible through

Which of the following is not a source of power?

In a fuel cell, electricity is produced by

Which type of plant has the minimum running cost per kWh of energy generated?

In a power plant, a reserve generating capacity whichis not in service but is in operation is known as

An interconnected system has the following plants I. Run off the river plant II. Nuclear power plant III. Steam power plant IV. Diesel engine plant Which two plants can be exclusively used for base load?

Which of the following is unconventional source of electrical power?

Site for which of the following plant is decided on the basis of the contours of the land only?

The portion of the power canal that extends from the intake works to the power plant, is known as

A portion of the power canal which extends from the power house to the recipient water course, is known as

Thermionic converters are based on the priniciple of

Load factor is

For economy in power generation

A load curve is a plot of

During summer months, the increased load is due to

Load due to a ceiling fan is nearly ____ watts

Which of the following utility item has the highest power rating?

A power plant supplying energy to a city will usually experience peak demand from

Capital cost per MWh is highest in case of

A diesel power plant is best suited as

A gas turbine power plant usually suits for

Which power plant can not have a single unit of 100 MW?

The usefu life of a diesel engine in a power plant is expected to be ____ years.

Which of the following power plants is to have the longest expected life?

A nuclear power plant is invariably used as

During load shedding

In a steam power plant which component need maximum maintenance attention?

Which of the following relations is not correct?

Low utiliization factor of a power plant indicate that the plant is

A body is ____ under ordinary conditions

A positively charged body has ____

A negatively charge body has _____.

This paper does not exhibit electricity because it contains the same number of _____

The value of the absolute permittivity air is _____

The relative permittivity of a material is 10. Its absolute permittivity will be _____

The force between two charges placed at given distance apart ____ as the relative permittivity of the medium is granted

Another name for relative permittivity is ____

The relation between absolute permittivity (E0) of air, absolute permeability (µ0) of air and velocity of light (C) is given by _____

Electric lines of force leave or enter the charged surface at an angle of _____

Electric field intensity is expressed in ______

Electric field intensity is a

Electric field intensity at point due to a given charge _____ if the relative permittivity of the medium decreases

Electric flux density is a _____

The absolute permittivity of material is ____.

Electrical field intensity at a point is numerically equal to the _____ at the point

Electric potential is a _____

Another name for dielectric strength is

Which of the following materials has the highest dielectric strength?

In electron iron _____ is used as the insulating material

What will happen to an insulating medium if voltage more than the breakdown voltage is applied to it?

Capacitor are used to

The effect of the dielectric in a capacitor to

In a radio, a gang capacitor is a type of

The power dissipated in a pure capacitor is

In a capacitor, the electric charge is stored in the

One farad is

If a dielectric is placed in an electric field, the field strength ____

A circuit component which opposes the change in circuit voltage is ______

Internal heating of a capacitor is attributed to its ____

The ohmmeter reading for a shorted capacitor is ______

A trimmer is a variable capacitor in which capacitance is obtained by changing the ______

A gang capacitor is a variable capacitor in which capacitance is varied by changing _____

When the movable plates of a gang capacitor completely overlap the fixed plates, the capacitance of the capacitor is ______

The charging of a capacitor through a resistance follows _____

The energy stored in a capacitor is given by _____

The force between two charges is 120 N. If the distance between the charges is doubled, the force will be

The capacitance of a capacitor is not affected by

When a dielectric slab is introduced in a parallel plate capacitor, the potential difference between plates will

A capacitor consists of

A capacitor in a circuit became hot and ultimately exploded due to wrong connections, which type of capacitor it could be?

The ratio of electric flux density to electric field intensity is called _____ of the medium

Energy stored in the electric field of a capacitor C when charged from a D.C. source of voltage V is equal to ….. Joules

When 4 volts emf is applied across a 1 farad capacitor, it will store energy of

The unit of electric intensity is L

The value of E within the field due to a point charge can be found with the help of

The inverse of capacitance is called

The phenomenon of an unchanged body getting charged merely by the nearness of a charged body is known as

The unit of dielectric strength is given by

The propery of a capacitor to store electricity is called its

Permittivity is expressed in

A capacitor of 80uF is charged to a p.d of 250 V. The charge acquired by it is

When a dielectric is placed in an electric field the field strength

Which of the following capacitors will have least energy stored in it?

A positive and a negative charge are initially 50mm apart. When they are moved closed together so that they are now only 10 mm apart, the force between them will be

A capacitor having a capacitance of 40 uF is connected across 250 V D.C source. The charging current will be least

The force betweeen two charges is 120 N. If the distance between the charges is doubled, the force will be

The mass of an electron is equal to

The direction of electric field due to positive charge is

The ability of charged bodies to exert force on one another is attributed to the existence of

A capacitor stores 0.24 coulombs at 10 volts. Its capacitance is

If three 15 uF capacitors are connected in series, the net capacitance is

The capacitance of a capacitor is not affected by

Which of the following is not a vector?

Three capacitors each of the capacity C are given. The resultant capacity 2/3 C can be obtained by using them

In a capacitor, the electric charge is stored in the

When a dielectric slab is introduced in a parallel plate capacitor, the potential difference between plates will

A gang condenser is a

A paper capacitor is usually available in the form of

A capacitor in a circuit became hot and ultimately exploded due to wrong connections, which type of capacitor it could be

The ratio of electric flux density to electric field is called ____ of the medium

The capacitor preferre for high frequency circuits is

Which of the following material has least value of dielectric constant?

The electrostatic force between two charges of one coulomb each and placed at a distance of 0.5 m will be

____ capacitors are mainly used for radio frequency tuning

____ capacitors can used only for D.C

____ capacitor are used for audio frequency and radio frequency coupling and tuning

The area of plates of the parallel plate capacitor, to obtain capacity of 0.3 x 10-3 uF if they are separated by a distance of 10 mm and a dielectric between them of permittivity = 2.5, will be

An electrolytic capactor is generally made to provide

In order to remove static electricity from machinery

Which of the following medium will have highest value of relative permittivity?

Which is the most superior dielectric out of the following?

To prevent the generation of static charges on rubber or flat leather?