Description : What are the methods used to measure the flow?
Last Answer : Mechanical (float) type and ultrasonic type methods are used to measure the flow.
Description : State the methods used to measure insulation resistance and explain Dielectric Absorption method.
Last Answer : There are three types of tests for measuring insulation resistance: 1. Spot test reading or Short Time test 2.Time-resistance test or Dielectric absorption test or Testing methods based on the PI & DAR 3. ... and if value of PI is less than 2 and value of DAR is less than 1.25
Description : Out of the following methods of heating the one which is independent of supply frequency is (A) electric arc heating (B) induction heating (C) electric resistance heating (D) dielectric heating
Last Answer : (C) electric resistance heating
Description : The illustrated circuits are used to measure ___________. EL-0024 A. resistance B. gauss or magnetic field strength C. battery discharge rate in Amp-hours D. current
Last Answer : Answer: A
Description : If reading AC current with the illustrated device and unsure of the range as a precaution , the first step should be to _________. EL-0047 A. secure power and test for voltage B. disconnect the ... resistance and use Ohm's law to calculate current D. unable to safely measure current with the device
Description : A multimeter can be used to measure _____________. A. resistance B. voltage C. current D. all of the above
Last Answer : Answer: D
Description : When working on electrical circuits containing large capacitors, in addition to deenergizing the circuit, which of the listed precautions should also be taken? A. Keep all radio equipment ... capacitor insulation resistance. C. Ground the capacitor terminals. D. Check capacitor circuit polarity.
Last Answer : Answer: C
Description : You are calibrating a multimeter using internal batteries to supply power for resistance measurements. However, you are unable to adjust the pointer to 'zero' using the adjustment knob. Therefore, you should ... change scales to the R X 100 scale and adjust using the 'zero ohms' adjusting knob
Description : A galvanometer is an instrument used to measure ___________. A. thickness of galvanized metal B. resistance of electrical wiring insulation C. very small amounts of current or voltage D. quantity of galvans in an electric circuit
Description : An ammeter should be used to measure ___________. A. the voltage between two points in a circuit B. circuit continuity C. current flow in a circuit D. total or partial circuit resistance
Description : Before using a volt-ohmmeter to measure resistance readings, you should _____________. A. replace all batteries B. test the insulation resistance of the leads C. make sure the test leads do not touch D. hold the leads together and 'zero' the meter
Description : Which of the listed statements is correct when using an analog multimeter as an ohmmeter? A. The pointer should be adjusted to zero each time a new resistance range is selected. B. The ... C. Ohmmeters are not sufficiently sized to measure conductor insulation resistance. D. All of the above.
Description : What are the different methods of firing circuits for line commutated converter?
Last Answer : a. UJT firing circuit. b. The cosine wave crossing pulse timing control. c. Digital firing schemes.
Description : What are the different methods to turn on the thyristor?
Last Answer : a. Forward voltage triggering b. Gate triggering c. dv/dt triggering d. Temperature triggering e. Light triggering
Description : What are the different turn on methods of SCR?
Last Answer : Forward voltage triggering Gate Triggering dv/dt triggering Temperature triggering Light triggering
Description : What are the different methods for the starting of a synchronous motor.
Last Answer : Starting methods: Synchronous motor can be started by the following two methods: By means of an auxiliary motor: The rotor of a synchronous motor is rotated by auxiliary motor. Then ... rotor and the rotor starts rotating continuously as the rotor field is locked with stator revolving field.
Description : Can you list some traditional and non-traditional methods to measure progress in life?
Last Answer : Please provide some background on what you are asking. As written, it doesn’t make much sense.
Description : How we measure the size of a virus (the methods)? -Biology
Last Answer : Size of virus particles commonly is determined three ways: (1) Electronmicroscopy (2) Ultrafiltration and (3) Ultracentrifugation. and density gradient ultracentrifugation to determine size of a virus believed to be one cause of Infectious Bovine Keratitis (IBK).
Description : Direct methods to measure bacterial growth would include all the following except the a. total bacterial count b. microscopic count c. turbidity measurements d. most probable number
Last Answer : c. turbidity measurements
Description : Monitoring of blood levels of diuretic drugs is not practised because: A. No sensitive methods for measuring blood levels of diuretics are available B. It is easier to measure the effect of these ... Response to diuretics is not related to their blood levels D. Diuretics need activation in the body
Last Answer : B. It is easier to measure the effect of these drugs
Description : Which one of the following methods serve to measure correlation between two variables? (A) Scatter Diagram (B) Frequency Distribution (C) Two-way table (D) Coefficient of Rank Correlation
Last Answer : (D) Coefficient of Rank Correlation
Description : The electrical diagram shown in the illustration shows _____________. EL-0021 A. 'R1', 'R2', and 'R3' are connected is series B. 'R1', 'R2', and 'R3' are connected in parallel C. the voltages measured across ... if 'R1', 'R2' and 'R3' have different values D. the total resistance equals R1 + R2 + R3
Last Answer : Answer: B
Description : Different between megger and contact resistance meter?
Last Answer : Answers: Megger used to measure cable resistance, conductor continuity, phase identification where as contact resistance meter used to measure low resistance like relays ,contactors.
Description : What is different between resistance grounding system and resistance earthing system?
Last Answer : In resistance grounding system the neutral point of the load is connected to the ground to carry the residual current in case of unbalanced conditions. Resistance earthing system is done in an electric equipment in order to protect the equipment in occurrence of fault in the system.
Last Answer : Megger used to measure cable resistance, conductor continuity, phase identification where as contact resistance meter used to measure low resistance like relays, contactors.
Description : Which of the methods listed is used to maintain the division of load between two compound-wound, DC generators operating in parallel? A. The shunt fields are interconnected. B. The shunt ... generators are connected in series. D. The equalizer connection parallels the series fields of all machines.
Description : Which of the methods listed is used to start a AC generator turning? A. Residual magnetism remaining in the field poles. B. Residual magnetism remaining in the field coils. C. Residual magnetism remaining in the armature. D. Rotation by a mechanical prime mover.
Description : Under normal conditions, storage batteries used for starting the emergency diesel generator are maintained in a charged state by which of the following methods? A. Trickle charging B. Fast charging C. Equalizing charge D. Reverse charging
Description : The operator of electrical motors should keep a constant check on the loads they carry because _____________. A. low loads necessitate frequent insulation cleaning B. exceeding nameplate values shortens ... wasted if full loading is not utilized D. power factor correction methods are load dependent
Description : Which of the following methods should be used to test for an 'open' coil in an AC motor stator? A. Test with an ohmmeter, one test lead on the shaft, and the other test lead to the stator leads ... an open coil. D. Use a growler, listening for noise and vibration to increase when over an open coil.
Description : Which of the following methods should be used to dress the face of silver-plated contacts? A. Filing B. Burnishing C. Sanding with 0000 sandpaper D. All of the above are correct.
Description : Which of the methods listed is used to maintain equal load sharing between two compound wound DC generators operating in parallel? A. The shunt fields are interconnected. B. The shunt field rheostats ... are connected in series. D. The series fields of both generators are connected in parallel.
Description : Methods to control speed of Wound Rotor Motors?
Last Answer : The speed of wound rotor motors are changed by changing the slip of the motor. This can be achieved by: Varying the stator line voltage Varying the resistance in the rotor circuit Inserting and varying a foreign voltage source in the rotor circuit
Description : What are methods available for making single phase induction motor a self starting?
Last Answer : By slitting the single phase, by providing shading coil in the poles.
Description : What are the two methods of control in ac voltage controllers?
Last Answer : a. ON-OFF control b. Phase control
Description : What are the methods of reduction of harmonic content?
Last Answer : a. Transformer connections b. Sinusoidal PWM c. Multiple commutation in each cycle d. Stepped wave inverters
Description : What are the methods of checking the phase difference?
Last Answer : 1. All Dark lamp method 2. Two bright one dark lamp method 3. Synchroscope
Description : Name the various methods for predetermining the voltage regulation of 3-phase Alternator.
Last Answer : The following are the three methods which are used to predetermine the voltage regulation of smooth cylindrical type Alternators · Synchronous impedance / EMF method · Ampere-turn / MMF method · Potier / ZPF method
Description : List some methods of cooling of transformers.
Last Answer : A:Air natural, Air blast, Oil Natural, Oil natural air forced, Oil natural water forced, Oil forced, Oil forced air natural, Oil forced air natural, Oil forced water forced.
Description : What are the methods adopted to reduce harmonic torques?
Last Answer : The methods used for reduction or elimination of harmonic torques are chording, integral slot winding, skewing and increasing the length of air gap.
Description : List out the methods to improve the power factor of the induction motor.
Last Answer : The power factor of the induction motor can be improved by reducing the magnetizing current and leakage reactance. The magnetizing current can be reduced by reducing the length of air gap. The ... stator & rotor slots, by providing short chorded winding and reducing the overhang in stator winding.
Description : List out the methods of speed control of cage type 3-phase induction motor?
Last Answer : a) By changing supply frequency b) By changing the number of poles c) By operating two motors in cascade
Description : What are the methods for determining depreciation charges?
Last Answer : The decrease in the value of the power plant equipment and building due to constant use is known as depreciation. The cost of depreciation will depend on the size and type of equipment ... equals the cost of equipment. The methods commonly used for determination of annual depreciation charges are
Description : What are the advantages of synthetic testing methods?
Last Answer : The breaker can be tested for desired transient recovery voltage and RRRV. Both test current and test voltage can be independently varied. This gives flexibility to the test The method is simple With ... capacity (MVA) of five time of that of the capacity of the test plant can be tested.
Description : What are the indirect methods of circuit breaker testing?
Last Answer : o Unit test o Synthetic test o Substitution testing o Compensation testing o Capacitance testing
Description : Give the two methods of arc interruption?
Last Answer : High resistance interruption:-the arc resistance is increased by elongating, and splitting the arc so that the arc is fully extinguished Current zero method:-The arc is interrupted at current zero position that occurs100 times a second in case of 50Hz power system frequency in ac.
Description : What are the methods of capacitive switching?
Last Answer : • Opening of single capacitor bank • Closing of one capacitor bank against another
Description : Name any two methods of reducing short circuit current/ By providing neutral reactance.
Last Answer : By introducing a large value of shunt reactance between buses.
Description : What are the iterative methods mainly used for solution of load flow study.
Last Answer : The Guass sedal method and Newton Raphson method are the two iterative methods.