State the causes of deterioration of liquid and solid dielectrics.

State the causes of deterioration of liquid and solid dielectrics. 
by

1 Answer

Answer :

The causes of deterioration of liquid and solid dielectrics: 

1. Voltage rating

2. Humidity in atmosphere or moisture content. 

3. Temperature of the oil and solid dielectric material

4. Due to improper cable joints and connection.

5. Increasing in supply frequency.

6. Due to unbalanced load.

by

Related questions

Ionic non polar solid dielectrics contain more than one type of atoms but no permanent dipoles. State True/False a) True b) False

Description : Ionic non polar solid dielectrics contain more than one type of atoms but no permanent dipoles. State True/False a) True b) False

Last Answer : a) True

Explain the reasons for failure of gaseous and solid dielectric materials used in electrical engineering application.

Description : Explain the reasons for failure of gaseous and solid dielectric materials used in electrical engineering application. 

Last Answer : Reasons for failure of gaseous and solid dielectric materials used in electrical engineering application. 1. If the system voltage increases more than breakdown voltage for some interval then ... chemical breakdown usually occurs at very high temperature and high humidity of the surrounding air 

Riboflavin deficiency causes (A) Cheilosis (B) Loss of weight (C) Mental deterioration (D) Dermatitis

Description : Riboflavin deficiency causes (A) Cheilosis (B) Loss of weight (C) Mental deterioration (D) Dermatitis

Last Answer : Answer : A

What are the two common causes of transmission-line deterioration?

Description : What are the two common causes of transmission-line deterioration?

Last Answer : Corrosive effects of salt water and weather extremes.

Define "Magneto-striction"? State the causes for loss of magnetism.

Description : Define "Magneto-striction"? State the causes for loss of magnetism.

Last Answer : Magneto-striction:  Magneto-striction is the change in dimensions of ferromagnetic material, when it is magnetized Following are the causes for loss of magnetism:  1. Heating effect: Beyond a certain ... machining loss of magnetism is possible. 5. Due to Ageing: Loss of Magnetism is possible. 

State the causes for dielectric failure of highly purified transformer oil.

Description : State the causes for dielectric failure of highly purified transformer oil. 

Last Answer : The causes for dielectric failure of highly purified transformer oil:  1. Voltage rating 2. Humidity in atmosphere 3. Temperature of the oil 4. Due to improper cable joints and connection. 5. Increasing in supply frequency. 6. Due to unbalanced load. 

Name one gaseous and one liquid electrical insulation material.

Description : Name one gaseous and one liquid electrical insulation material. 

Last Answer : i) Gaseous insulating material : 1. Air 2. Nitrogen 3. Hydrogen 4. SF6 ii) liquid insulating material: 1. Transformer oil 2. Capacitor oil 3. Cable oil 4. Pyranol 5. Savotal 6. Savol 7. Vegetable oil 8. Silicon liquids 

Which of the following states is characterized by a decline in intellectual functioning? a) Dementia Dementia is an acquired syndrome in which progressive deterioration in global intellectual abilities is of such severity that it interferes with the person’s customary occupational and social performance. b) Depression Depression is a mood disorder that disrupts quality of life. c) Delirium Delirium is often called acute confusional state. d) Delusion Delusion is a symptom of psychoses.

Description : Which of the following states is characterized by a decline in intellectual functioning? a) Dementia Dementia is an acquired syndrome in which progressive deterioration in global intellectual abilities is of ... is often called acute confusional state. d) Delusion Delusion is a symptom of psychoses.

Last Answer : a) Dementia Dementia is an acquired syndrome in which progressive deterioration in global intellectual abilities is of such severity that it interferes with the person’s customary occupational and social performance.

Certain substances loose their electrical resistance completely at super low temperature. Such, substances are called. (1) Super conductors (2) Semi conductors (3) Dielectrics (4) Perfect conductors

Description : Certain substances loose their electrical resistance completely at super low temperature. Such, substances are called. (1) Super conductors (2) Semi conductors (3) Dielectrics (4) Perfect conductors

Last Answer : (1) Super conductors Explanation: Superconductors are materials that carry electrical current with little or no resistance when cooled, below a certain temperature. While conventional superconductors need to ... temperature superconductors do so above the boiling point of liquid nitrogen (-196 °C).

What determines the velocity factor in a transmission line? A. The termination impedance B. The line length C. Dielectrics in the line D. The center conductor resistivity

Description : What determines the velocity factor in a transmission line? A. The termination impedance B. The line length C. Dielectrics in the line D. The center conductor resistivity

Last Answer : C. Dielectrics in the line

What determines the velocity factor in transmission line? A. The center conductor resistivity B. Dielectrics in the line C. The termination impedance D. The line length

Description : What determines the velocity factor in transmission line? A. The center conductor resistivity B. Dielectrics in the line C. The termination impedance D. The line length

Last Answer : B. Dielectrics in the line

The skin effect is a phenomenon observed in a) Insulators b) Dielectrics c) Conductors d) Semiconductors

Description : The skin effect is a phenomenon observed in a) Insulators b) Dielectrics c) Conductors d) Semiconductors

Last Answer : c) Conductors

In pure dielectrics, the parameter that is zero is a) Attenuation b) Propagation c) Conductivity d) Resistivity

Description : In pure dielectrics, the parameter that is zero is a) Attenuation b) Propagation c) Conductivity d) Resistivity

Last Answer : c) Conductivity

The attenuation constant in lossless dielectrics will be a) 0 b) 1 c) -1 d) ∞

Description : The attenuation constant in lossless dielectrics will be a) 0 b) 1 c) -1 d) ∞

Last Answer : a) 0

For dielectrics, which two components will be in phase? a) E and wave direction b) H and wave direction c) Wave direction and E x H d) E and H

Description : For dielectrics, which two components will be in phase? a) E and wave direction b) H and wave direction c) Wave direction and E x H d) E and H

Last Answer : d) E and H

Skin depth phenomenon is found in which materials? a) Insulators b) Dielectrics c) Conductors d) Semiconductors

Description : Skin depth phenomenon is found in which materials? a) Insulators b) Dielectrics c) Conductors d) Semiconductors

Last Answer : c) Conductors

Both the conduction and displacement current densities coexist in which medium? a) Only conductors in air b) Only dielectrics in air c) Conductors placed in any dielectric medium d) Both the densities can never coexist

Description : Both the conduction and displacement current densities coexist in which medium? a) Only conductors in air b) Only dielectrics in air c) Conductors placed in any dielectric medium d) Both the densities can never coexist

Last Answer : c) Conductors placed in any dielectric medium

Capacitance grading of cable implies (a) use of dielectrics of different permeabilities (b) grading according to capacitance of cables per km length (c) cables using single dielectric in different concentrations (d) capacitance required to be introduced at different lengths to counter the effect of inductance (e) none of the above

Description : Capacitance grading of cable implies (a) use of dielectrics of different permeabilities (b) grading according to capacitance of cables per km length (c) cables using single dielectric in different ... introduced at different lengths to counter the effect of inductance (e) none of the above

Last Answer : (a) use of dielectrics of different permeabilities

The value of ∈r for various dielectrics is always: (a) Larger than unity (b) Less than unity (c) Equal to unity (d) None of above

Description : The value of ∈r for various dielectrics is always: (a) Larger than unity (b) Less than unity (c) Equal to unity (d) None of above

Last Answer : (a) Larger than unity

Distinguish between dielectrics and insulators

Description : Distinguish between dielectrics and insulators

Last Answer : Dielectrics Insulators 1. The materials, which are used to prevent the loss of electricity through certain parts of an electrical system, are known as dielectrics. 1. Insulators or insulating materials ... Air, N2 gas , CO2 gas, Silicon fluid etc 5. Examples-Rubber, Plastics etc.

Certain substances loose their electrical resistance completely at super low temperature. Such substances are called. (1) Super conductors (2) Semi conductors (3) Dielectrics (4) Perfect conductors

Description : Certain substances loose their electrical resistance completely at super low temperature. Such substances are called. (1) Super conductors (2) Semi conductors (3) Dielectrics (4) Perfect conductors

Last Answer : Super conductors

Dielectrics.............

Description : Dielectrics.............

Last Answer : NPTEL Distributed under Creative Commons Attribution-ShareAlike - CC BY-SA.

A single core lead sheathed cable with two dielectrics of permittivity 4 and 3, respectively, are subjected to

Description : A single core lead sheathed cable with two dielectrics of permittivity 4 and 3, respectively, are subjected to same maximum stress. If the conductor diameter is 1.5 cm, the outer diameter of the first dielectric is (A) 1.125 cm (B) 1.5 cm (C ) 2 cm (D) 8 cm

Last Answer : A single core lead sheathed cable with two dielectrics of permittivity 4 and 3, respectively, are subjected to same maximum stress. If the conductor diameter is 1.5 cm, the outer diameter of the first dielectric is 2 cm 

In today's computer world, children are already seeing and learning more about the Internet, do you think this is contributing to the deterioration of the parent-child relationship?

Description : Today’s kids no longer ask their parents, they rather look online for the answer most of the time.

Last Answer : My opinion is that the parent should break the boundaries. I may be old-fashioned, but my child can't watch what he wants. There is a laptop and internet in vain. If I don't let something go, ... me about anything, I never bothered that I couldn't reach it. Luckily we have a good relationship :)

What impact did slavery have on the deterioration of the Roman economy?

Description : What impact did slavery have on the deterioration of the Roman economy?

Last Answer : Need answer

What are Common deterioration of lamp holders and their wire connection?

Description : What are Common deterioration of lamp holders and their wire connection?

Last Answer : Feel Free to Answer

How do you treat gum deterioration and pain?

Description : How do you treat gum deterioration and pain?

Last Answer : Feel Free to Answer

Deterioration of food (rancidity) is due to presence of (A) Cholesterol (B) Vitamin E (C) Peroxidation of lipids (D) Phenolic compounds

Description : Deterioration of food (rancidity) is due to presence of (A) Cholesterol (B) Vitamin E (C) Peroxidation of lipids (D) Phenolic compounds

Last Answer : Answer : C

Which of the following statement(s) is/are true concerning the microvascular and cellular response to shock? a. Osmodically induced mobilization of intracellular fluid is the initial response to restore intravascular volume b. With larger volume hemorrhagic shock deterioration of normal cellular transmembrane potential occurs resulting in an increase in extracellular sodium and water c. The accumulation of anaerobic metabolites override normal homeostatic vasomotor tone and contribute to the maladaptive vasodilatation d. Abnormal intracellular calcium homeostasis may contribute to the cellular dysfunction of shock

Description : Which of the following statement(s) is/are true concerning the microvascular and cellular response to shock? a. Osmodically induced mobilization of intracellular fluid is the initial ... d. Abnormal intracellular calcium homeostasis may contribute to the cellular dysfunction of shock

Last Answer : Answer: c, d Moderate hypovolemia results in a relatively rapid spontaneous restitution of intravascular volume through expansion of the plasma space. This plasma expansion by ... potassium pump. Cellular dysfunction also appears to be related to abnormal intracellular calcium homeostasis

The deterioration of a metal by an electrochemical process is commonly termed as – (1) Erosion (2) Corrosion (3) Passivation (4) Abrasion

Description : The deterioration of a metal by an electrochemical process is commonly termed as – (1) Erosion (2) Corrosion (3) Passivation (4) Abrasion

Last Answer : (2) Corrosion Explanation: Corrosion can be defined as the deterioration of materials by chemical processes.

Grounds occurring in electrical machinery as a result of insulation failure may result from _____________. A. deterioration through extended use B. excessive heat C. extended periods of vibration D. all of the above

Description : Grounds occurring in electrical machinery as a result of insulation failure may result from _____________. A. deterioration through extended use B. excessive heat C. extended periods of vibration D. all of the above

Last Answer : Answer: D

Diphenylamine is added to rubber to (A) Vulcanise it (B) Protect it from deterioration on exposure to air (C) Make it non-inflammable (D) Make it thermosetting

Description : Diphenylamine is added to rubber to (A) Vulcanise it (B) Protect it from deterioration on exposure to air (C) Make it non-inflammable (D) Make it thermosetting

Last Answer : (B) Protect it from deterioration on exposure to air

Mastication of rubber means (A) Its softening (B) A treatment to retard its deterioration due to oxidation (C) Improving its curing rate (D) Depression of its freezing point

Description : Mastication of rubber means (A) Its softening (B) A treatment to retard its deterioration due to oxidation (C) Improving its curing rate (D) Depression of its freezing point

Last Answer : (A) Its softening

The damage/deterioration of metals by the __________ action of fluids is called 'erosion'. (A) Abrasive (B) Corrosive (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : The damage/deterioration of metals by the __________ action of fluids is called 'erosion'. (A) Abrasive (B) Corrosive (C) Both (A) & (B) (D) Neither (A) nor (B)

Last Answer : (A) Abrasive

What is balance in nature? What is the role of human in deterioration of this balance?

Description : What is balance in nature? What is the role of human in deterioration of this balance?

Last Answer : i) An ecosystem is self-sustaining system. Except energy (light) it does not require any thing from outside it. ii) The system is capable of maintain itself because of the delicate ... human activity. ii) Human are disturbing the balance through pollution and deforestation, on global environment.

The tissue structure deteriorates as the virus multiplies. This deterioration is called A.aneuploidy B.protopathic effect C.cytopathic effect D.none of these

Description : The tissue structure deteriorates as the virus multiplies. This deterioration is called A.aneuploidy B.protopathic effect C.cytopathic effect D.none of these

Last Answer : C.cytopathic effect

Digestion of wood-base materials (for manufacture of pulp) is done to (A) Remove lignin (B) Produce long fibres (C) Prevent deterioration on storage (D) None of these

Description : Digestion of wood-base materials (for manufacture of pulp) is done to (A) Remove lignin (B) Produce long fibres (C) Prevent deterioration on storage (D) None of these

Last Answer : (A) Remove lignin

In connection with corrosion of metals, passivation is the process that (A) Intensifies deterioration (B) Changes the composition of the metal (C) Inhibits further deterioration (D) None of these

Description : In connection with corrosion of metals, passivation is the process that (A) Intensifies deterioration (B) Changes the composition of the metal (C) Inhibits further deterioration (D) None of these

Last Answer : (C) Inhibits further deterioration

Which of the following reflect the pathophysiology of cutaneous signs of HIV disease? a) Immune function deterioration Cutaneous signs may be the first manifestations of HIV, appearing in more than 90 per cent of HIV infected patients as the immune function deteriorates. Common complaints include pruritis, folliculitis, and chronic actinic dermatitis.

Description : Which of the following reflect the pathophysiology of cutaneous signs of HIV disease? a) Immune function deterioration Cutaneous signs may be the first manifestations of HIV, appearing in more ... Decrease in normal skin flora Cutaneous signs of HIV disease appear as immune function deteriorates.

Last Answer : a) Immune function deterioration Cutaneous signs may be the first manifestations of HIV, appearing in more than 90 per cent of HIV infected patients as the immune function deteriorates. Common complaints include pruritis, folliculitis, and chronic actinic dermatitis.

Excessive camber on pavements may cause (A) Deterioration of central portion (B) Slip of the speedy vehicles towards the edges (C) Erosion of the berms (D) All the above

Description : Excessive camber on pavements may cause (A) Deterioration of central portion (B) Slip of the speedy vehicles towards the edges (C) Erosion of the berms (D) All the above

Last Answer : Answer: Option D

The MIL is illuminated and a battery module deterioration diagnostic trouble code is stored the most like cause is a failed by a) High voltage battery b) High voltage inverter c) Motor/ generator d) DC/ DC converter

Description : The MIL is illuminated and a battery module deterioration diagnostic trouble code is stored the most like cause is a failed by a) High voltage battery b) High voltage inverter c) Motor/ generator d) DC/ DC converter

Last Answer : a) High voltage battery

The deterioration of a metal by an electrochemical process is commonly termed as (1) Erosion (2) Corrosion (3) Passivation (4) Abrasion

Description : The deterioration of a metal by an electrochemical process is commonly termed as (1) Erosion (2) Corrosion (3) Passivation (4) Abrasion

Last Answer : Corrosion

State two insulators of following types along with their areas of application: (i) Class A (ii) Class E (iii) Class H

Description : State two insulators of following types along with their areas of application: (i) Class A (ii) Class E (iii) Class H 

Last Answer : Temperature class and withstand temperature ranges for them: 

State the need for strictly following safety rules while working in electrical installations.

Description : State the need for strictly following safety rules while working in electrical installations. 

Last Answer : Need for strictly following safety rules while working in electrical installations: 1. To avoid the electrical shock to the human being and to provide safe guard. 2. To minimize the chances ... of the electrical devices. 5. To minimize the chances of mechanical and electrical accidents. 

State any two electrical, mechanical and thermal properties of insulating materials.

Description : State any two electrical, mechanical and thermal properties of insulating materials. 

Last Answer : i) Electrical Properties of insulating material:- 1. It should have high resistance. 2. It should have high breakdown voltage. 3. It should have high dielectric strength. 4. It should have low ... . 4. Ii should have thermal Stability. 5. Co-efficient of thermal expansion should be low.

State any four IE Rules to be followed in respect of safety while working on electrical installation system.

Description : State any four IE Rules to be followed in respect of safety while working on electrical installation system.  

Last Answer : While working in an electrical installation following safety IE rules regarding with safety: 1. IE Rule 3 : Authorization 2. IE Rule 29 : Construction and maintenance of electrical supply line and apparatus ... . IE Rule 60: Test for resistance of insulation 27. IE Rule 61: Connection with earth 

State the use of following: (i) Screw driver (ii) Nose pliers (iii) Wire gauge (iv) Test lamp

Description : State the use of following: (i) Screw driver (ii) Nose pliers (iii) Wire gauge (iv) Test lamp 

Last Answer : i) Screw Driver: Usually hand-operated, for turning screws with slotted heads for losing and tightening the screws.  ii) Nose pliers : To hold and tight the wires   iii) Wire Gauge: To ... supply voltage, Verification of voltage & current in the system and also check the open circuit fault. 

State any two applications of: (i) Ferromagnetic (ii) Paramagnetic material.

Description : State any two applications of: (i) Ferromagnetic (ii) Paramagnetic material. 

Last Answer : Applications of Ferromagnetic Materials:  1. In the transformer laminations. 2. In Electrical machines as a magnetic material. 3. In Magnetic poles of motor and generator 4. Magnetic ... : 1. Solid state MASER  2. Using adiabatic demagnetization low temperature can be achieved. 

State any two applications of gaseous insulating material used in switchgears.

Description : State any two applications of gaseous insulating material used in switchgears. 

Last Answer : Applications of gaseous insulating material used in switchgears:   1. Non inflammable material (gas) in switchgear. 2. High dielectrical strength material in electrical machine. 3. As a cooling agent in circuit breaker