Description : What is the reciprocal of capacitance?

**Answer** : The reciprocal of capacitance is called elastance, and its unit is the reciprocal farad, also called the daraf.

Description : What is the reciprocal of inductance?

**Answer** : This term is not exist

Description : What is the reciprocal of resistivity?

**Answer** : conductivity, mho

Description : what is the reciprocal of admittance?

**Answer** : impedance is the reciprocal of admittance.

Description : Reciprocal of reluctance is?

**Answer** : Reciprocal of reluctance is permeance.

Description : Conductance is reciprocal of?

**Answer** : Conductance is reciprocal of resistance.

Description : What is the unit of reactance?

**Answer** : Unit of reactance is Ohms ( Ω ) .Reactance is denoted by X .

Description : What is the inverse of reactance?

**Answer** : Inverse of reactance is Susceptance .Unit of Susceptance is Siemens.

Description : Capacitive reactance

**Answer** : Capacitive reactance formula

Description : Parallel Reactance and Resistance Example 1

**Answer** : Parallel Reactance and Resistance Example 1

Description : AC Circuits with Resistance but No Reactance

**Answer** : AC Circuits with Resistance but No Reactance AC Circuits with Resistance but No Reactance Series resistances let two resistances R 1 and R 2 are connected in series as shows in figure and there ... voltage. Voltage V A is common to both the branch hence voltage V A is common reference.

Description : Capacitive reactance is more when?

**Answer** : Capacitive reactance is more when capacitance is less and frequency of supply is less.

Description : Define impedance diagram and reactance diagram.

**Answer** : Impedance diagram: Impedance diagram is the simplified equivalent circuits of single line or one line diagrams of power system in which all components are represented by their equivalent circuit. ... machines are neglected and is used only for fault current calculation is called reactance diagram.

Description : If the % reactance upto the fault point is 20%, then the short circuit current will be

**Answer** : If the % reactance upto the fault point is 20%, then the short circuit current will be 5 times the full load current

Description : A single phase transformer has resistance and reactance of 0.2 pu and 0.6 pu respectively. Its pu voltage regulation at 0.8 pf lagging would he

**Answer** : A single phase transformer has resistance and reactance of 0.2 pu and 0.6 pu respectively. Its pu voltage regulation at 0.8 pf lagging would he 0.52

Description : Consider the following statements. Which of these statements are correct ? (1) Reactance relays are preferred for ground fault relaying (2) Impedance relays are most suitable for:protecting long transmission lines (3) Mho relays are best ... (1) and (3) (C) (2) and (4) (D) (1), (2) and (4)

**Answer** : Consider the following statements. Which of these statements are correct ? (1) Reactance relays are preferred for ground fault relaying (2) Impedance relays are most suitable for:protecting long transmission lines (3) Mho relays are ... (1) and (3) (C) (2) and (4) (D) (1), (2) and (4)

Description : Reactance relay is normally preferred for protection against

**Answer** : Reactance relay is normally preferred for protection against earth faults

Description : Ratio of the rotor reactance X to the rotor resistance R for a two-phase servo motor (A) is equal to that of a normal induction motor (B) is less than that of a normal induction motor (C) ... than that of a normal induction motor (D) may be less or greater than that of a normal induction motor

**Answer** : C

Description : A 4000 kVA, 11 kV/132 kV delta-star connected 3-phase transformer has reactance, x1 = 0.12 p.u. The actual value of x1 referred to the low voltage side is (A) 0.85 Ω (B) 3.63 Ω (C) 36.3 Ω (D) 252 Ω

**Answer** : A 4000 kVA, 11 kV/132 kV delta-star connected 3-phase transformer has reactance, x1 = 0.12 p.u. The actual value of x1 referred to the low voltage side is 3.63 Ω

Description : A reactance relay is (A) Voltage restrained directional relay (B) Directional restrained over-current relay (C) Voltage restrained over current relay (D) Directional restrained over voltage relay

**Answer** : A reactance relay is Directional restrained over-current relay

Description : Circuits with XL Alone

**Answer** : Circuits with XL Alone X L values in series let two inductive reactances X L 1 and X L 2 are connected in series and has value 50 ohm and 50 ohm respectively. 100 volts A C ... phasor. And it is taken horizontal. Phase angle between inductive current and voltage is same 90 degree.

Description : A capacitor-start single phase induction motor is switched on to supply with its capacitor replaced by an inductor of equivalent reactance value. It will?

**Answer** : A capacitor-start single phase induction motor is switched on to supply with its capacitor replaced by an inductor of equivalent reactance value. It will not start at all.

Description : what is the reciprocal of resistance ?

**Answer** : reciprocal of resistance is conductance.

Description : What is the reactance of a 3H inductor when the frequency is 120 Hz? A. 2260 ohm B. 2060 ohm C. 360 ohm D. 0

**Answer** : 2260 ohm is the reactance of a 3H inductor when the frequency is 120 Hz.

Description : For a two -port reciprocal network, the three transmission parameters are A = 4, B = 7 and C = 5. What is the value of D ? (a) 9.5 (b) 9.0 (c) 8.5 (d) 8.0

**Answer** : For a two -port reciprocal network, the three transmission parameters are A = 4, B = 7 and C = 5. What is the value of D ? (a) 9.5 (b) 9.0 (c) 8.5 (d) 8.0

Description : Admittance is reciprocal of (a) susceptance (b) impedance (c) reactance (d) conductance

Description : For a two port network to be reciprocal: (A) Z11= Z22 (B) Y21 = Y21 (C) h21 = h22 (D) AD-BC = 0

Description : The reciprocal of resistance is called (A) Impedance (B) Conductance (C) Inductance (D) Susceptance

Description : State under what situations differential leveling and reciprocal leveling is adopted.

**Answer** : 1. Differential leveling is adopted when i. The points are at a great distance apart. ii. The difference of elevation between the points is large. iii. There is obstacle between the points. ... or valley as it is not possible to place the level midway between two points on opposite banks.

**Answer** : Circuits with capacitive reactance X C alone. Capacitive reactance X C values in series. There is no resistance or inductive reactance only capacitive reactance is there. Let two capacitive ... horizontal in phasor diagram. The total current I T leads voltage V A by 90 degree.

Description : Potier reactance of an alternator is almost the same as (a) Field winding reactance (b) Total armature reactance (c) Leakage reactance of field winding (d) Armature leakage reactance

**Answer** : Potier reactance of an alternator is almost the same as Armature leakage reactance

Description : The operating characteristics of a reactance type distance relay (A) a stepped waveform for increasing reactance (B) a straight line for a constant reactance (C) a circle for a constant reactance (D) a set of circles for variable reactances

**Answer** : The operating characteristics of a reactance type distance relay a straight line for a constant reactance

Description : A 3-phase star-connected 75 MVA, 25 kV 3-phase synchronous generator has a synchronous reactance of 1.0 p.u. The per unit value to a 90 MVA base and 30 kV is (A) 2/15 p.u. (B) 5/6 p.u. (C) 1.0 p.u. (D) 1.2 p.u.

**Answer** : A 3-phase star-connected 75 MVA, 25 kV 3-phase synchronous generator has a synchronous reactance of 1.0 p.u. The per unit value to a 90 MVA base and 30 kV is 5/6 p.u.

Description : The maximum possible power of a 3-phase synchronous motor with synchronous reactance 0.8 p.u. connected to a bus-bar of 1.0 p.u. and excitation adjusted to 1.2 p.u. is (A) 0.5 p.u. (B) 0.96 p.u. (C) 1.5 p.u. (D) 1.8 p.u.

**Answer** : The maximum possible power of a 3-phase synchronous motor with synchronous reactance 0.8 p.u. connected to a bus-bar of 1.0 p.u. and excitation adjusted to 1.2 p.u. is 1.5 p.u.

Description : A single phase, 2000V alternator has armature resistance and reactance of 0.8 ohm and 4.94 ohm respectively. The voltage regulation of the alternator at 100A, 0.8 leading pf is (A) 7% (B) - 8.9% (C) - 6.3% (D) 0%

Description : If X is the system reactance and R is its resistance, the power transferred is maximum when (1) X=R (2) X=1.414 R (3) X=1.732 R (4) X=2R

**Answer** : x = 1.732R

Description : The synchronous reactance of the synchronous machine is the ratio between: (A) open circuit voltage and short circuit current at Constant field current (B) short circuit Voltage and open ... at different field current (D) short circuit voltage and open circuit current at different field current

**Answer** : The synchronous reactance of the synchronous machine is the ratio between: open circuit voltage and short circuit current at constant field current

Description : A Reactor having an inductive reactance of 4 ohm is connected to the terminals of a 120 V AC generator. Calculate the power associated with the reactor. (A) 3.6 kvar (B) 30 kvar (C) 7.2 kvar (D) 4.16 kvar

**Answer** : In an induction motor, if the rotor resistance is equal to stand-still reactance then the maximum torque is equal to starting torque.

Description : The reactance offered by a capacitor to alternating current of frequency 50 Hz is 20 Q. If frequency is increased to 100 Hz, reactance becomes_____ohms.

**Answer** : The reactance offered by a capacitor to alternating current of frequency 50 Hz is 20 Q. If frequency is increased to 100 Hz, reactance becomes 10 ohms.

Description : State the purposes of following methods of leveling. i)Profile leveling, ii)Fly leveling, iii)Check leveling iv)Reciprocal leveling

**Answer** : 1. Profile leveling- To determine the undulation of ground surface along given line for alignment of road, canal or pipe, railway line 2. Fly leveling-It is used to for connecting B.M. to ... is used to find the difference in leveling between two points two point obstructed due to river or pond.

Description : Explain reciprocal ranging with neat sketch.

**Answer** : Reciprocal ranging is done when ends of survey line are not intervisible due to hill intervening or ends of survey line are at far distance apart. Step wise procedure reciprocal ranging: 1. Let A and B be ... chained. 8. This method can also be used in ranging a line across a valley.

Description : Explain with neat sketch the procedure of reciprocal ranging.

**Answer** : Reciprocal ranging / Indirect ranging Procedure: Let A and B be two survey stations. They are not mutually visible due to high ground between them. Let two assistant stands at M1 and N1 as ... and N1 which are nearer to line AB. Repeat same process until points M and N are established.

Description : Explain reciprocal levelling with neat sketch.

**Answer** : Reciprocal levelling is adopted i) To find the difference in level accurately Between the two points considerably apart. ii) When it is not possible to set up the level in between the two points ... true difference is equal to the mean of the two apparent differences of level between A and B

Description : Successful Communication in classroom teaching is (A) Circular (B) Reciprocal (C) Directional (D) Influential

**Answer** : (B) Reciprocal

Description : The sum of a positive number and its reciprocal is twice the difference of the number and its reciprocal. The number is : (A) √2 (B) 1/√2 (C) √3 (D) 1/√3

**Answer** : Answer: C

Description : Which one of the following is correct, when a class grants friend status to another class? (A) The member functions of the class generating friendship can access the members of the friend class. (B) ... the friendship. (C) Class friendship is reciprocal to each other (D) There is no such concept.

**Answer** : All member functions of the class granted friendship have unrestricted access to the members of the class granting the friendship.

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