Knowledge of fire hydrant operation is necessary in order to perform flow water from hydrant discharge openings to flush sediment.
A fire hydrant, water plug, or firelock is a connection point by which firefighters can faucet into water delivery. It is part of active fire protection. Underground fire hydrants had been utilized in Europe and Asia on the grounds that as a minimum the 18th century. Above-ground pillar-kind hydrants are a 19th-century invention.
Utilized by firefighters for the duration of a fire to place out the flames, the hearth fire hydrant functions by means of permitting your local firefighters to fast the faucet into your water utility's pressurized water gadget. The firefighters eliminate a nozzle or two, fasten hoses to the nozzles and flip the valve to get the water flowing.
The two kinds of fire hydrant systems are dry barrel and moist barrel. The moist barrel fireplace hydrant gives a consistent drift of water, while the dry barrel hearth hydrant requires a valve launch to allow water to enter. It's miles meant to allow on the spot get admission to water within the case of a hearth.
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Answer: 1.(D), 2.(D) and 3.(B)
Explanation: 1. Mercury is the smallest planet in the solar system which means its gravity is too weak to hold down a normal atmosphere.
2. Venus is very hot because it is surrounded by a very thick atmosphere . As sunlight passes through the atmosphere, it heats up the surface of Venus which results in the heats being trapped and building up extremely high temperature. Whereas, Mercury has no atmosphere at all.
3. The moon has more craters than the earth because of the moon's lack of atmosphere.
The correct answer would be Richard B. Russel, born in 1897
in Winder, all in all served 50 years in the public office be that as a US senator,
state legislator or as the governor of Georgia. He was known as the one of the
most influential senators who was below only the president of the United States.
I don't know your options, but here is a list of some of the things that they preyed upon:
-antisemitism and racism, fear of foreigners and of others: Antisemitism and the other related ideas were already present in the society, but they used it to their advantage - they blamed the others
-weak economy - before their rise to power, there was en economic crisis and such crises make people more vulnerable to propaganda
