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What is a Ductor tester used for?

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Description : Earth Tester Practical

Answer : Practical Significance Earthing System or Grounding System is an electrical network work as a safety measure to protect human life as well as equipment. The main objective of the Earth testing is to ... than 5 Ohm, pour the water in funnel of earth electrode and measure the earth resistance.

Description : Draw labeled dead weight tester.

Answer : dead weight tester

Description : State how pressure measurement can be done using Dead weight tester.

Answer : The handle is fully drawn out and the oil is allowed to enter in the cylinder (i.e. gauge and piston) The weight to be measured is placed on the platform. Now the handle is turned ... of the area of the piston and the pressure indicated on the gauge is equal to the weight under measurement.

Description : State working principle of earth tester.

Answer : Earth tester:-The resistance of the earth is measured with the help of earth tester. It consists of a hand cranked type generator, the magnet poles, crossed coils and flexible spirals. It consists ... deflection of the pointer will indicate directly resistance in ohm of the earth under test.

Description : How do you use a Megger tester?

Description : Describe construction and working of Dead Weight Tester used in pressure calibration.

Answer : Dead weight tester:  Construction: It consists of a very accurately machined, bored and finished piston which is inserted into a close-fitting cylinder. The cross sectional areas of ... within the cylinder when the fluid gauge pressure equals the dead weight divided by the piston area.  

Description : Transformer oil tester is used to know • Permittivity • Permeability • Dielectric strength • Resistance of the oil

Answer : Transformer oil tester is used to know Dielectric strength

Description : A software project was estimated at 352 Function Points (FP). A four person team will be assigned to this project consisting of an architect, two programmers, and a tester. The salary of the architect is Rs.80,000 per month, the ... ) Rs.28,16,000 (2) Rs.20,90,000 (3) Rs.26,95,000 (4) Rs.27,50,000

Answer : (4) Rs.27,50,000 

Description : Describe the procedure for the measurement of earth resistance by using earth tester.

Answer : Measurement of earth resistance by using earth tester:  It is connected to earth electrode E, whose resistance is to be measured, and the other spike P and R, as shown in the ... , the deflection of the pointer will indicate directly resistance in ohm of the earth electrode under test. 

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

Description : What does BIL stand for in electrical terms?

Answer : BIL stands for Basic Insulation Level.

Description : Back-to back connection is used in HVDC system to  A) Provide synchronous tie between two systems B) Provide bulk power transmission over long distance C) Provide asynchronous tie between two systems D) Reduce the line voltage drop and the transmission loss

Description : Why high voltage is used in power transmission?

Answer : The primary reason that power is transmitted at high voltages is to increase efficiency. ... The lower current that accompanies high voltage transmissionreduces resistance in the conductors aselectricity flows ... This means that thin, light-weight wires can beused in long-distance transmission.

Description : What is pressure calibration? State stepwise procedure to test the accuracy of pressure gauge with dead weight tester.

Answer : Explanation- The handle is fully drawn out and the oil is allowed to enter in the cylinder (i.e. gauge and piston). A known accurate weight is placed on the platform. The area of ... reduce the friction between the piston and cylinder, the piston is gradually rotated while a reading being taken

Description : What is a Tong-Tester? A. Its Clip-on- Ammeter B. It measures high AC. C. Clam-on-Ammeter D. All of above

Answer : What is a Tong-Tester? A. Its Clip-on- Ammeter B. It measures high AC. C. Clam-on-Ammeter D. All of above

Description : The breakeven distance for HVDC transmission is (A) 100 kM (B) 250 kM (C) 500 kM – 800 kM (D) Above 1000 kM 

Description : A bus coupler circuit breaker is utilized in a sub-station for  A) Connecting the transmission line with the bus-bar B) Connecting two power transformers in parallel C) Connecting the bus-bar with ground D) Connecting main and transfer buses in the sub-station

Description : Which of the following is a myth in testing? a) Tester can find bugs b) Any user can test software c) Missed defects are not due to testers d) Complete testing is not possible

Answer : Ans : b

Description : Explain the working and principle of dead weight tester.

Answer : Dead weight tester:  Principle: It works on the principle that the downward force of the weight on the top of the piston is balanced by the pressure exerted by the fluid beneath the piston  ... within the cylinder when the fluid gauge pressure equals the dead weight divided by the piston area.

Description : Explain the process of calibration of pressure gauge by Dead Weight Tester.

Answer : Deadweight Testers (DWT) are the primary standard for pressure measurement. A dead weight tester is an instrument that calibrates pressure by determining the weight of force divided by the area the force ... at each gauge reading and ensure that it is within the acceptable accuracy limits.

Description : Draw and explain the construction and working of Dead Weight Tester.

Answer : Construction:- Deadweight Tester (DWT) is used for calibration of pressure gauges . A dead weight tester is an instrument that calibrates pressure by determining the weight of force divided by ... the error at each gauge reading and ensure that it is within the acceptable accuracy limits.

Description : Which of the following are facts about a top-down software testing approach? I. Top-down testing typically requires the tester to build method stubs. II. Top-down testing typically requires the tester to build test drivers. (1) only I (2) Only II (3) Both I and II (4) Neither I nor II

Answer : (1) only I

Description : State any one application of each tool : (i) Earth tester (ii) Megger (iii) Bearing puller (iv) Growler 

Answer : i) Earth Tester :- It is used to measure earth resistance.  ii) Megger :- Megger is used to find out (measure) insulation resistance of electrical machine/equipment.  iii) ... is an electrical device used to find out shorted turn faults in armature winding and stator winding of motor.

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 do you mean by insulation coordination?

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 an insulation resistance test?

Description : What is impulse voltage of transformer?

Description : What is double or reinforced insulation?

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 is basic insulation level?

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 : Which of the following is TRUE with respect to HVDC transmission line? (A) For a short distance it is economical over HVAC. (B) In HVDC system, harmonics are not generated. (C) Use of HVDC can improve system stability. (D) Less and cheap terminal, equipments are required in HVDC.

Answer : Which of the following is TRUE with respect to HVDC transmission line? (A) For a short distance it is economical over HVAC. (B) In HVDC system, harmonics are not generated. (C) Use of HVDC can improve system stability. (D) Less and cheap terminal, equipments are required in HVDC.

Description : A Unified Power Flow Controller (FACTS controller) is a voltage source converter based (A) Inter-phase power controller (B) Static Compensator (C) Combination of series and shunt compensators (D) Solid-state series compensator

Answer : A Unified Power Flow Controller (FACTS controller) is a voltage source converter based Combination of series and shunt compensators

Description : In voltage source converter based HVDC transmission system the active power is controlled by changing (A) phase angle of the converter ac input voltage (B) supply frequency of the converter ac input voltage (C) magnitude of the converter ac input voltage (D) DC voltage at the inverter terminals

Answer : In voltage source converter based HVDC transmission system the active power is controlled by changing phase angle of the converter ac input voltage

Description : In the case of second order differential equation if the damping ratio is unity, then the poles are  A) Equal, positive and real B) Imaginary and complex conjugate C) Equal, negative and real D) None of the above

Description : The effect of corona in high voltage a.c. transmission line is  A) Increased energy loss in the transmission line B) Increased line reactance C) Increased line to line capacitance D) All of the above 

Description : When the communication line run parallel to the power lines in close proximity  P. The electromagnetic effect produces current due to induction resulting its superposition on the speech signal of the communication line causing distortion  Q. The ... ) R only B) P, Q & R C) P & Q only D) P & R only

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