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What is double or reinforced insulation?

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Description : What is the lowest acceptable insulation resistance for a cable?

Description : What do you mean by insulation coordination?

Description : What is an insulation resistance test?

Description : What is basic insulation level?

Description : What does double integration of a unit step function lead to? A) A doublet B) A ramp C) An impulse D) A parabola 

Answer : What does double integration of a unit step function lead to? A) A doublet B) A ramp C) An impulse D) A parabola 

Description : In a double squirrel cage induction motor, good starting torque is produced as (A) Large current flows through the outer high resistance winding. (B) Large current flows through the inner high ... the outer high resistance winding. (D) Large current flows through the inner low resistance winding.

Answer : In a double squirrel cage induction motor, good starting torque is produced as Large current flows through the outer high resistance winding.

Description : The double energy transient occur in the?

Answer : The double energy transient occur in the R-L-C circuit.

Description : Write measures to be taken to maintain the insulation resistance of electrical machines to healthy levels.

Description : Name the method used to measure following resistances:- (i) Low resistance (ii) Medium resistance (iii) Insulation resistance (iv) Earth resistance.

Answer : Following are the methods used to measure resistances:-  (i) Low resistance: 1.Voltmeter-Ammeter Method 2. Kelvin's Double bridge Method  (ii) Medium resistance: 1.Voltmeter-Ammeter Method 2. ... of Charge Method  (iv) Earth resistance : 1. Fall of Potential Method 2. Earth tester

Description : If the insulation resistance of a cable of length 10 km is 1 mega ohm, its insulation resistance for 50 km length will be

Answer : If the insulation resistance of a cable of length 10 km is 1 mega ohm, its insulation resistance for 50 km length will be 0.2 mega ohm

Description : When measuring insulation resistance of cables using d.c. source, the galvanometer used should be initially short circuited because  (A) Cables have a low value of capacitance which draws a high ... high value of charging current (D) Cables have a low value of capacitance and initial resistance

Answer : When measuring insulation resistance of cables using d.c. source, the galvanometer used should be initially short circuited because Cables have a high value of capacitance which draws a high value of charging current

Description : The thickness of insulation provided on the conductor depends on?

Answer : The thickness of insulation provided on the conductor depends on the magnitude of voltage on the conductor.

Description : The insulation on a current carrying conductor is provided?

Answer : The insulation on a current carrying conductor is provided to prevent leakage of current, to prevent shock.

Answer : Meggar is an instrument which measures the insulation resistance of an electric circuit relative to earth and one another.

Answer : Insulation resistance of high voltage circuit breakers is more than 100 mega ohms.

Description : Do you ever double or triple check things? If so, what?

Description : Select insulating materials for following parts : (i) Insulation between heating element and base plate of electric iron. (ii) Insulation used over copper or aluminium conductor used for making coils. (iii) Transformer bushings. (iv) Insulation between transmission line and pole.

Answer : Parts Insulating Materials  Insulation between heating element and base plate of electric iron. Mica Insulation used over copper or aluminium conductor used for making coils.  ... Transformer bushings Porcelain  Insulation between transmission line and pole. Porcelain

Description : Which of the following test is carried out to ensure the sufficient strength of insulation between two or more conductors to avoid leakage between them ?   (a) Testing of insulation resistance ... conductors (c) Testing of polarity of single phase switch (d) Testing of earth continuity path 

Description : Is more power dissipated in series or parallel?

Description : Is 50hz or 60hz better?

Description : Which type of glass is used for making glass reinforced plastic? (1) Pyrex glass (2) Flint glass (3) Quartz glass (4) Fibre glass

Answer : Fibre glass

Description : Define the following special types of concretes with its one use. i) Vacuum concrete ii) Fiber reinforced concrete iii) High performance concrete iv) Self-compacting concrete

Answer : The uses of special types of concretes are as follows.  i) Vacuum concrete: It is the concrete in which entrained air and excess water form concrete mix is taken out from vacuum pump, ... . large bridge and machine foundations iii. Pumped concrete for floors and slabs. iv. Pre-stressed concrete

Description : Suggest the degree of workability in terms of slump for the following: i) Pavements using pavers ii) Canal lining iii) Heavily reinforced sections iv) In-situ piling

Answer : Degree of workability in terms of slump for the following: i) Pavements using pavers: 25-75 mm ii) Canal lining: 70-80 mm iii) Heavily reinforced sections: 50-100 mm iv) In-situ piling: 100-150 mm

Description : State four point of differences between reinforced concrete and fibre reinforced concrete.

Answer : Differences between reinforced concrete and fibre reinforced concrete:  Sr. No. Reinforced concrete (RCC)  Fibre reinforced concrete (FRC) 1 In this concrete, steel bars are used as ... etc. FRC is used in tunnel lining, runway, aircraft parking, repair of dams, etc.

Description : Solids may be considered to be either crystalline noncrystalline. The basic difference between them is that a crystal, in contrast to a noncrystal: w) has a sharp melting point x) has an irregular array of atoms y) exhibits double refraction z) has a completely regular atomic or molecular structure

Answer : ANSWER: Z -- HAS A COMPLETELY REGULAR ATOMIC OR MOLECULAR STRUCTURE

Description : Would you like me to give you a formula for... success? It's quite simply, really. Double your rate of failure... You're thinking of failure as the enemy of success. But it isn't at all... ... , remember that's where you'll find success. On the far side of failure. - Thomas J. Watson famous quote

Answer : Due to no potential difference between the ends of the circiut there is no existance of current 

Description : What are the losses in a transmission line?

Description : What is meant by flash over voltage?

Description : What is dielectric breakdown strength?

Description : What is the difference between line and phase current?

Answer : The currents flows through phase lines is called line voltage and currents flows from phase to neutral line is called phase current

Description : What is the purpose of using a Megger?

Description : What is dielectric withstand voltage?

Description : What does BIL stand for in electrical terms?

Answer : BIL stands for Basic Insulation Level.

Description : What is a safe distance from power lines?

Description : What is the definition of extra low voltage?

Answer : Extra-low voltage (ELV) is an electricity supply voltage in a range which carries a low risk of dangerous electrical shock.

Description : What is the difference between line and phase voltage?

Answer : Line voltage  is  voltage  between two  phases R &Y  (415 v)  while  phase  voltage  is  the  voltage  between  one  phase and  a neutral  B &  N   (240 v).

Description : What is a Ductor tester used for?

Description : What is impulse voltage of transformer?

Description : What is a switching impulse?

Description : What is Extra High Voltage?

Description : What is the difference between a line voltage and low voltage control system?

Description : What are the advantages of high voltage transmission?

Answer : Advantages:  1. As Transmission voltage increases, current decreases. 2. As current decreases, cross section of conductor decreases. 3. As cross section of conductor decreases ... line increases  12. As transmission voltage increases power handling capacity of transmission line increases 

Description : What is a high voltage test?

Description : What is considered low voltage and high voltage?

Description : What is the use of lightning arrester?

Answer : The lighting arrester is used to discharge the high voltage surge towards the earth by the lighting strike

Description : If the distance between the centers of mass of two bodies is doubled, the gravitational force between the bodies will become what portion of the original force: w) double x) one half y) remain the same z) one quarter

Answer : ANSWER: Z -- ONE QUARTER

Description : What are alkenes having two double bonds separated by one single bond known as?

Answer : ANSWER: CONJUGATED DIENES 

Description : What is the term given to a fatty acid that has more than one set of double bonds between carbons?

Answer : ANSWER: POLYUNSATURATED 

Description : A UNIX file system has 1 KB block size and 4-byte disk addresses. What is the maximum file size if the inode contains ten direct block entries, one single indirect block entry, one double indirect block entry and one triple indirect block entry? (A) 30 GB (B) 64 GB (C) 16 GB (D) 1 GB

Answer : (C) 16 GB

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