What is the station ground resistance?

What is the station ground resistance?
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1 Answer

Answer :

Less than 0.5 ohms.  
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Related questions

Which of the following statements is correct concerning the circuits in a sound powered telephone system? A. The ringing circuit is composed of only one common wire to ground. B. The common talking circuit is composed of two ungrounded wires. C. The ringing circuit has two grounded wires connected to each station. D. The talking and calling circuits are electrically dependent upon each other.

Description : Which of the following statements is correct concerning the circuits in a sound powered telephone system? A. The ringing circuit is composed of only one common wire to ground. B. The common ... connected to each station. D. The talking and calling circuits are electrically dependent upon each other.

Last Answer : Answer: B

Ground resistance should be designed such that: a) grounding resistance should be as low as possible b) grounding resistance should be as high as possible c) grounding resistance should be always zero d) none of the above

Description : Ground resistance should be designed such that: a) grounding resistance should be as low as possible b) grounding resistance should be as high as possible c) grounding resistance should be always zero d) none of the above

Last Answer : Ans: A

In preparing to take insulation resistance readings on a main generator, the windings should be grounded for about 15 minutes prior to the test to _____________. A. allow accurate zeroing of the meter B. help the windings to cool to ambient temperature C. release any residual capacitive charge from the windings D. help the windings to cool to the same temperature as the ground test connection

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Last Answer : Answer: C

An open in the armature of a DC motor is suspected, but is not found by visual inspection of the commutator. The next step in troubleshooting this problem is to ________________. A. conduct a bar to bar test of the armature B. visually inspect the armature windings C. conduct an insulation resistance test of the armature D. test the commutator for a ground

Description : An open in the armature of a DC motor is suspected, but is not found by visual inspection of the commutator. The next step in troubleshooting this problem is to ________________. A. conduct a ... windings C. conduct an insulation resistance test of the armature D. test the commutator for a ground

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Last Answer : Answer: A

When insulation failure produces a low resistance current path between two conductors, the resulting condition is known as ____________. A. an open B. a short circuit C. a ground D. a surge

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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 away. B. Measure capacitor insulation resistance. C. Ground the capacitor terminals. D. Check capacitor circuit polarity.

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Description : When troubleshooting motor controllers, a shorted relay or contactor coil is often indicated by _______________. A. a resistance reading of 'infinity' on an ohmmeter B. charred insulation and/or a blown ... of the coil's leads to ground D. a higher-than-normal voltage reading across the winding

Last Answer : Answer: B

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With both ends of a three conductor cable disconnected and arranged without the conductors touching each other, an ohmmeter reading of 'zero' ohms between the ends of one conductor would indicate _____________. A. continuity B. a partial ground C. the resistance is infinite D. a short circuit

Description : With both ends of a three conductor cable disconnected and arranged without the conductors touching each other, an ohmmeter reading of 'zero' ohms between the ends of one conductor would indicate _____________. A. continuity B. a partial ground C. the resistance is infinite D. a short circuit

Last Answer : Answer: A

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Description : During its operation, loud buzzing and resultant welding of contacts of a magnetic relay may be caused by __________. A. overheating of the contactor coil B. low voltage on the operating coil C. low insulation resistance to ground D. lubrication of the contact bearing points

Last Answer : Answer: B

If you disconnect and arrange both ends of a three conductor cable, without any contact between the individual conductors, an indicated ohmic value between the ends of a single conductor would indicate ______________. A. continuity of the conductor B. an infinite resistance C. the presence of a partial ground D. that the conductor is not short circuited

Description : If you disconnect and arrange both ends of a three conductor cable, without any contact between the individual conductors, an indicated ohmic value between the ends of a single conductor would indicate ... resistance C. the presence of a partial ground D. that the conductor is not short circuited

Last Answer : Answer: A

An accidental path of low resistance, allowing passage of abnormal amount of current is known as a/an ____________. A. open circuit B. short circuit C. polarized ground D. ground reference point

Description : An accidental path of low resistance, allowing passage of abnormal amount of current is known as a/an ____________. A. open circuit B. short circuit C. polarized ground D. ground reference point

Last Answer : Answer: B

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Last Answer : ANSWER: D

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Last Answer : ANSWER: D

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Last Answer : A. Communication satellite

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Last Answer : B. 275 ms

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Description : A satellite receives an uplink frequency of _______ MHz from a ground station of 3700 MHz. A. 8150 MHz B. 1475 MHz C. 2225 MHz D. 5925 MHz

Last Answer : D. 5925 MHz

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Last Answer : c. Never

The callsign suffix of a station providing clearance delivery would be: a. CLEARANCE b. GROUND c. DELIVERY d. PRESTO

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An aircraft has to communicate with a VHF station at a range of 300nm, if the ground station is situated 2,500ft amsl, which of the following is the lowest altitude at which contact is likely to be made? a. 190ft b. 1,378ft c. 36,100ft d. 84,100ft

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Last Answer : c. 36,100ft

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Description : The DME counters are rotating continuously. This indicates that: a. The DME is unserviceable b. The DME is trying to lock onto range c. The DME is trying to lock onto frequency d. The DME is receiving no response from the ground station

Last Answer : b. The DME is trying to lock onto range

The callsign of a station controlling surface vehicles in the manoeuvring area would be: a. TOWER b. CLEARANCE c. GROUND d. APRON

Description : The callsign of a station controlling surface vehicles in the manoeuvring area would be: a. TOWER b. CLEARANCE c. GROUND d. APRON

Last Answer : c. GROUND

When reporting a frequency the use of the word “DECIMAL” can be omitted: a. When there is no likelihood of confusion b. After the initial call c. Never d. By the ground station only

Description : When reporting a frequency the use of the word “DECIMAL” can be omitted: a. When there is no likelihood of confusion b. After the initial call c. Never d. By the ground station only

Last Answer : c. Never

The callsign suffix of a station providing clearance delivery would be: a. CLEARANCE b. GROUND c. DELIVERY d. PRESTO

Description : The callsign suffix of a station providing clearance delivery would be: a. CLEARANCE b. GROUND c. DELIVERY d. PRESTO

Last Answer : c. DELIVERY

Which of the following station is least efficient........ A.Nuclear power plant B.Diesel power station C.Thermal power station D.None of the above

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Coast Guard Regulations (46 CFR), require that an indicating light at the propulsion control station will operate if overloading or overheating occurs in a _______________. A. forced draft blower motor B. steering gear motor C. fuel pump motor D. condensate pump motor

Description : Coast Guard Regulations (46 CFR), require that an indicating light at the propulsion control station will operate if overloading or overheating occurs in a _______________. A. forced draft blower motor B. steering gear motor C. fuel pump motor D. condensate pump motor

Last Answer : Answer: B

Before any work on electrical or electronic equipment is performed, which of the following precautions should be carried out? A. De-energize the applicable switchboard bus. B. Bypass the interlocks. C. Secure and tag the supply circuit breaker in the open position. D. Station a man at the circuit supply switch.

Description : Before any work on electrical or electronic equipment is performed, which of the following precautions should be carried out? A. De-energize the applicable switchboard bus. B. Bypass the interlocks. C. ... supply circuit breaker in the open position. D. Station a man at the circuit supply switch.

Last Answer : Answer: C

Sound powered telephone units 'I', 'II', and 'III' of the circuit shown in the illustration are for 'station numbers' _____________. EL-0093 A. 2, 4 and 6 B. 1, 2 and 3 C. 3, 5 and 8 D. 1, 2 and 6

Description : Sound powered telephone units 'I', 'II', and 'III' of the circuit shown in the illustration are for 'station numbers' _____________. EL-0093 A. 2, 4 and 6 B. 1, 2 and 3 C. 3, 5 and 8 D. 1, 2 and 6

Last Answer : Answer: D

An overload in which of the listed motors will result in the illumination of an indicating light at the propulsion control station alarm panel? A. Fuel pump motor B. Steering motor C. Condensate pump motor D. Forced draft blower motor

Description : An overload in which of the listed motors will result in the illumination of an indicating light at the propulsion control station alarm panel? A. Fuel pump motor B. Steering motor C. Condensate pump motor D. Forced draft blower motor

Last Answer : Answer: B

Sections 'I', 'II' and 'III' of the circuit shown in the illustration are 'station numbers' _____________. EL-0093 A. 2, 4 and 6 B. 1, 2 and 3 C. 3, 5 and 8 D. 1, 2 and 6

Description : Sections 'I', 'II' and 'III' of the circuit shown in the illustration are 'station numbers' _____________. EL-0093 A. 2, 4 and 6 B. 1, 2 and 3 C. 3, 5 and 8 D. 1, 2 and 6

Last Answer : Answer: D

If coil 'R1-R2' on the transmitter in figure 'A' shown in the illustration is turned 30 degrees clockwise, corresponding coil 'R1-R2' on the receiver should ____________. EL-0092 A. make coils 'S1-S2-S3' turn faster because of induced currents B. ring at the receiving station until the turning stops C. receive a higher voltage depending on the turns ratio D. align itself to the same position if free to move

Description : If coil 'R1-R2' on the transmitter in figure 'A' shown in the illustration is turned 30 degrees clockwise, corresponding coil 'R1-R2' on the receiver should ____________. EL-0092 A. make coils 'S1 ... a higher voltage depending on the turns ratio D. align itself to the same position if free to move

Last Answer : Answer: D

The pushbutton on the handset of a ship's sound-powered telephone must be depressed to ______________. A. talk then released to listen B. listen then released to talk C. both talk and listen D. ring the station being called

Description : The pushbutton on the handset of a ship's sound-powered telephone must be depressed to ______________. A. talk then released to listen B. listen then released to talk C. both talk and listen D. ring the station being called

Last Answer : Answer: C

Factors on which material of station busbar depends?

Description : Factors on which material of station busbar depends?

Last Answer : Some of the factors on which station busbar depends are: Current Carrying capacity Short Circuit Stresses Establishing minimum electrical clearances

Operation carried out in Thermal power station?

Description : Operation carried out in Thermal power station?

Last Answer : The water is obtained in the boiler and the coal is burnt so that steam is obtained this steam is allowed to hit the turbine; the turbine which is coupled with the generator generates the electricity

What are the operation carried out in Thermal power station?

Description : What are the operation carried out in Thermal power station?

Last Answer : A: The water is obtained in the boiler and the coal is burnt so that steam is obtained this steam is allowed to hit the turbine, the turbine which is coupled with the generator generates the electricity

List the factors to be considered while choosing a site for steam power station:

Description : List the factors to be considered while choosing a site for steam power station:

Last Answer : 1.Supply of fuel 2.Availability of water 3.Transportation facilities 4.Cost and type of land 5.Nearness to load centres 6.Distance from populated area

What are the activities by which performance of the station will be judged?

Description : What are the activities by which performance of the station will be judged? 

Last Answer : Activities of station by which performance is judged by public a. Capacity factor. b. Availability factor. c. Radiation release (gas and liquid effluents). d. Thermal release. e. Man-rem. f. ... l. The profit earned by the Plant. m. The quality and cleanliness in and around the Plant. 

Why battery room should be located separately in a power station?

Description : Why battery room should be located separately in a power station? 

Last Answer : Possibility of battery explosion Corrosive atmosphere by acid spray. Fire hazard. 

What is station Black out condition?

Description : What is station Black out condition? 

Last Answer : Simultaneous failures of class IV and class III supply is called Station Black out. In this condition class II power UPS will feed the necessary loads for a 30 minutes of duration. After that supplementary ... (SCR) 5 kVA UPS is used for secondary shut down system (SSS) ion chamber amplifier. 

What are the problems in station operation due to grid under frequency?

Description : What are the problems in station operation due to grid under frequency?

Last Answer : a) Turbine having under frequency limitation, house load happen if < 48 Hz b) Due to under frequency PHT flow reduces, therefore reactor power reduces, generator power reduces c) If frequency is ... Hz DG cannot be synchronised to grid, therefore DG kept on isolation running d) GT overfluxing. 

What are the problems in station operation due to grid under voltage?

Description : What are the problems in station operation due to grid under voltage?

Last Answer : a) All the HT motors overloaded. b) VAR load increases on generator leads to heating up of rotor c) Stator current increases for same power export leads to stator over heating.

What do you understand by station black out?

Description : What do you understand by station black out?

Last Answer : When class IV and class III power supply fails and DG’s cannot be started and also this condition prevails for 5 minutes then it is called station black out condition.  

List out the components of station output system.

Description : List out the components of station output system. 

Last Answer : Main generator, Generator transformer, PT, CT, CVT, lightning arrestor, wave trap, main 220 kV bus, transfer bus, SF6 circuit breakers and isolators, line protection scheme, GT and Generator protection scheme, bus bar protection scheme etc.