Last Answer : Primary side is low voltage side and secondary side is high voltage side.
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124 views
1 answer
asked
Sep 27, 2017
by
anonymous

During open circuit test of a transformer?
Last Answer : During open circuit test of a transformer primary is supplied rated voltage.
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111 views
1 answer
asked
Mar 19, 2018
by
anonymous
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Last Answer : Low voltage side is short circuited.
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164 views
1 answer
asked
Sep 27, 2017
by
anonymous

Explain the open delta (delta-delta) test on transformer.
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75 views
0 answers
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Apr 27, 2020
by
anonymous

Last Answer : Primary is high voltage side and Secondary is low Voltage side.
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123 views
1 answer
asked
Sep 27, 2017
by
anonymous

Explain the procedure to perform Short Circuit test on single phase transformer with circuit diagram.
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116 views
0 answers
asked
Apr 27, 2020
by
anonymous

Last Answer : In short circuit test of transformer the low voltage side is short circuited . On high voltage side the voltmeter is connected in parallel and ammeter in series and also a wattmeter is ... circuit test is done for determining impedance and losses. In this test iron losses is neglected.
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171 views
1 answer
asked
Sep 3, 2017
by
anonymous

A d.c. source has an open circuit voltage of 30 V and an internal resistance of 1.5 Ohm. A resistive load is connected to the source. Maximum power dissipated in the load is (A) 300 W (B) 150 W (C) 45 W (D) 20 W
Last Answer : A d.c. source has an open circuit voltage of 30 V and an internal resistance of 1.5 Ohm. A resistive load is connected to the source. Maximum power dissipated in the load is 150 W
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297 views
1 answer
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Apr 25, 2018
by
anonymous

Describe the difference between an open circuit and a short circuit.
Last Answer : Open circuit means the wire is cut meaning power will not flow and close circuit means wire is not cut and hence power will flow.Short circuit is the same as close circuit
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7.9k views
3 answers
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Jun 29, 2019
by
anonymous

Last Answer : It is required to measure the true open circuit e.m.f. of a battery. The best device is D.C. potentiometer.
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285 views
1 answer
asked
Mar 21, 2018
by
anonymous

Explain open emitter BJT drive circuit.
Last Answer : open emitter BJT drive circuit:
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262 views
1 answer
asked
Feb 19, 2018
by
anonymous

An open-circuit test on a transformer is conducted primarily to measure?
Last Answer : The open-circuit test in a transformer is used to measure
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627 views
2 answers
asked
Mar 19, 2018
by
anonymous

A no-load test is performed on a transformer to determine?
Last Answer : A no-load test is performed on a transformer to determine magnetizing current and loss.
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124 views
1 answer
asked
Mar 19, 2018
by
anonymous
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Last Answer : Short circuit test on transformers is conducted to determine copper losses.
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221 views
1 answer
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Mar 19, 2018
by
anonymous

Last Answer : Open circuited armature coil of a D.C. machine is identified by the scarring of the commutator segment to which open circuited coil is connected and indicated by a spark completely around the commutator.
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162 views
1 answer
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Mar 20, 2018
by
anonymous

Last Answer : If the field winding of an unloaded salient pole synchronous motor is open circuited, the motor will stop.
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258 views
1 answer
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Mar 20, 2018
by
anonymous

Polarity Test of Transformer
Last Answer : Polarity Test of Transformer
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313 views
1 answer
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Apr 30, 2020
by
anonymous

If a 5-bus test system contains 6 transmission lines and one transformer, how many non-zero elements are there in the system Y-bus ? (A) 25 (B) 12 (C) 11 (D) 19
Last Answer : If a 5-bus test system contains 6 transmission lines and one transformer, 19 non-zero elements are there in the system Y-bus.
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3.0k views
1 answer
asked
Apr 28, 2018
by
anonymous

Sumpner's test is conducted on transformer to determine?
Last Answer : Sumpner's test is conducted on transformer to determine temprature.
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122 views
1 answer
asked
Mar 19, 2018
by
anonymous

66 While conducting short-circuit test on a transformer the following side is short circuited A. High voltage side B. low voltage side C. primary side D. secondary side
Last Answer : B. Low voltage side
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27 views
1 answer
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30 In performing the short circuit test of a transformer A. high voltage is usually short circuited B. low voltage side is usually short circuited C. any side is short circuited with preference D. none of the above
Last Answer : B. Low voltage side is usually short circuited
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12 views
1 answer

Equivalent circuit of transformer
Last Answer : Equivalent Circuit Diagram of Transformer Referred to Primary: V1 -Primary Input voltage I1 - Input Current I0- Exciting current/ No load current Im- Magnetizing component ... equivalent of secondary terminal voltage ZL- Load impedance ZL ′- Primary equivalent of load impedance
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389 views
2 answers
asked
May 17, 2020
by
anonymous

An AC supply of 230 V is applied to a half-wave rectifier circuit through a transformer having primary to secondary turn’s ratio 12:1. The peak inverse voltage is A) 8.62 V B) 12 V C) 19.17 V D) 27.11 V
Last Answer : An AC supply of 230 V is applied to a half-wave rectifier circuit through a transformer having primary to secondary turn’s ratio 12:1. The peak inverse voltage is A) 8.62 V B) 12 V C) 19.17 V D) 27.11 V
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261 views
1 answer
asked
Jun 18, 2018
by
anonymous

Last Answer : The short circuit in any winding of the transformer is the result of impulse voltage.
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175 views
1 answer
asked
Mar 20, 2018
by
anonymous

When secondary of a current transformer is open-circuited its iron core will be?
Last Answer : When secondary of a current transformer is open-circuited its iron core will be hot because of heavy iron losses taking place in it due to high flux density.
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167 views
1 answer
asked
Mar 19, 2018
by
anonymous

During short circuit test iron losses are negligible because A. The current on secondary side is negligible B. The voltage on secondary side does not vary C. The voltage applied on primary side is low D. Full-load current is not supplied to the transformer
Last Answer : C) the voltage applied on primary side is low
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53 views
1 answer

During short circuit test iron losses are negligible because A. The current on secondary side is negligible B. The voltage on secondary side does not vary C. The voltage applied on primary side is low D. Full-load current is not supplied to the transformer
Last Answer : C) the voltage applied on primary side is low
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5 views
1 answer

7 The main advantage of auto transformer over a two winding transformer is A. Hysteresis losses are reduced B. Saving in winding material C. Copper losses are negligible D. Eddy losses are totally ... voltage applied on primary side is low D. Full-load current is not supplied to the transformer
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22 views
0 answers

What are the disadvantages of Open loop control system?
Last Answer : Open loop control system are less reliable. In open loop control system Optimization is not possible. Open loop control system are less accurate.
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112 views
1 answer
asked
Jul 4, 2019
by
anonymous

Why CT is never operated with an open secondary ?
Last Answer : CT secondary should never be kept open because it will cause saturation of the core to a high level and very high voltage will appear across the secondary which can breakdown the insulation. One terminal of PT secondary is always grounded to avoid capacitive induction and for human safety
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95 views
2 answers
asked
Sep 6, 2018
by
anonymous

The secondary of a current transformer is always short-circuited under operating conditions because it?
Last Answer : The secondary of a current transformer is always short-circuited under operating conditions because it avoids core saturation and high voltage induction.
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108 views
1 answer
asked
Mar 19, 2018
by
anonymous

How to Open a Tight Jar Lid
Last Answer : How to Open a Tight Jar Lid There are instances when you buy a stubborn jar of pickles (Learn how to pickle), peanut butter or mayonnaise that you can't open with your hands. It can drive you ... no time. If you enjoy reading this article, you might as well read how to can fruits and vegetables.
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4 views
1 answer
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May 14, 2021
by
anonymous

How to Open a Can without a Can Opener
Last Answer : How to Open a Can without a Can Opener You're dying to sink your teeth into those canned peaches, but you find yourself without any can opener. At times like this, many people would easily give up ... you'll soon find yourself enjoying the yummy contents of the can. Be careful not to spill the food!
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4 views
1 answer
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May 14, 2021
by
anonymous

Open-Face Shrimp Melt
Last Answer : Open-Face Shrimp Melt - serves 2 Preparation - 15 minutes 3 ounces shelled and deveined cooked small shrimp, cut lengthwise into halves 1/4 cup chopped celery 2 tbsp chopped scallion (green ... baking sheet arrange sandwiches and broil 6 inches from heat source until cheese melts, about 1 minute.
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4 views
1 answer
asked
Apr 29, 2021
by
anonymous

What will happen to the gain margin if the gain of the open loop system is doubled? A) Doubled B) Becomes half C) Is not affected D) Becomes one-fourth
Last Answer : What will happen to the gain margin if the gain of the open loop system is doubled? A) Doubled B) Becomes half C) Is not affected D) Becomes one-fourth
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200 views
1 answer
asked
Jun 18, 2018
by
anonymous
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If the gain of the open loop system is doubled, the gain margin (1) Is not affected (2) Gets doubled (3) Becomes half (4) Becomes one -forth
Last Answer : If the gain of the open loop system is doubled, the gain margin Becomes half
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718 views
1 answer
asked
Apr 30, 2018
by
anonymous
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An open resistor, when checked with an ohm-meter reads?
Last Answer : An open resistor, when checked with an ohm-meter reads infinite.
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117 views
1 answer
asked
Mar 25, 2018
by
anonymous

What is an example of an open loop system?
Last Answer : Open loop system. Ex. Electric heater, washing machine, fan, electric switch, etc
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101 views
1 answer
asked
Mar 10, 2018
by
anonymous
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What are the advantages of open loop control system?
Last Answer : Open loop control system are simple to design. Open loop control system are generally stable.
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125 views
1 answer
asked
Mar 10, 2018
by
anonymous
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what is open loop and close loop control system?
Last Answer : A) In open loop system the input is independent of output but output is depends on input. A-1. no feedback path in open loop s/m -2. less accuracy than close loop s/m. Ex. Washing ... -3. high accuracy. Ex. Air conditioner ( AC ), rocket launcher, radar system, etc
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130 views
2 answers
asked
Dec 4, 2017
by
anonymous

Why the open circuit test on a transformer is conducted at rated voltage?
Last Answer : A:The open circuit on a transformer is conducted at a rated voltage because core loss depends upon the voltage. This open circuit test gives only core loss or iron loss of the transformer.
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4 views
1 answer

49 The open circuit test is carried out in a transformer to find the A. Cu loss B. Core loss C. Total loss D. Insulation resistance
Last Answer : B. Core loss
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11 views
1 answer
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With the help of neat diagram, describe the procedure to carry out phasing out test on a 3 phase transformer. Also state the purpose of conducting this test on 3 phase transformer.
Last Answer : i) This test is carried out on 3-ph transformer to identify primary & secondary winding belonging to the same phase. ii) As shown in fig above all primary & secondary phases ... of this test is to check the respective phases of primary & secondary windings in 3-ph transformer
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340 views
1 answer
asked
Apr 27, 2020
by
anonymous

Why phasing out and polarity test is carried out on three phase transformer?
Last Answer : The phasing out test is carried out to identify the windings (primary and secondary) of corresponding phase of the three phase transformer. The polarity test is carried out to identify the ... identical polarity of the primary and secondary windings of each phase of the three phase transformer.
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468 views
1 answer
asked
Jul 27, 2019
by
anonymous

40 No load test on a transformer is carried out to find A. Copper loss B. magnetising current C. Magnetising current and loss D. Efficiency of the transformer
Last Answer : C. Magnetising current and loss
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15 views
1 answer
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22 No load test on a transformer is carried out to find A. copper loss B. magnetising current C. Magnetising current and no load loss D. Efficiency of the transformer
Last Answer : C. Magnetising current and no load loss
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15 views
1 answer

Why would a grown man have a problem with the bedroom door being closed at night?
Last Answer : He can't be aware of what is going on in the house if the door is closed, may make him uncomfortable and unable to relax and sleep. I do this so if anything happens at night I stand a ... Some rooms just get stuffy when people are sleeping in the same closed up area. He could also be claustraphobc.
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0 views
1 answer
asked
Mar 1
by
anonymous
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If there was one day a week where you only had to work half a day, would you opt to sleep in and go in later in the morning, or get up early and leave work early in the afteroon?
Last Answer : I would personally choose to go in early and leave early. But it really depends on the job. If I really like the job, I might work the full day even if I didn’t have to.
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2 views
1 answer
asked
Feb 27
by
anonymous

State any two commands for managing disk space and also state their use
Last Answer : There are primarily two commands that can be used for managing Disk space: 1. df 2. du 1. df - disk filesystem df command (short for disk filesystem) is used to show disk utilization ... the disk space used by files on a machine and crucial for disk space management on unix and linux systems.
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21 views
1 answer
asked
Jan 31, 2021
by
anonymous

Last Answer : The duration of sudden short-circuit test on a synchronous motor is usually about one second.
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153 views
1 answer
asked
Mar 20, 2018
by
anonymous
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