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What is the elevator earthquake button?
The button is used to allow the elevator doors to be open in a safe way and allow the building security etc. to know you are there and need rescue.
What are air bricks?
It's a brick with lots of holes which will allow air to flow freely through a wall of a house or other building and help with ventilation, prevent damp etc.
What does a PVC do and what does it stand for in an internal combustion engine?
PVC - Positive Crankcase Ventilation. Used to allow the engine to vent out pressure that is creates while operating. Generally it is vented back into the air intake system after the air filter to get "burned" in the combustion chamber.
What are the six types of motor enclosures of Electrical matchines?
Types of enclosures are as follows:- 1)open type enclosure-(it is open from both the ends) 2)protected type enclosure-(not completely open from both the ends) 3)drip proof type enclosure-(does not allow liquid or moisture to enter) 4)totally enclosed enclosure-(does not allow foreign particles to enter) 5)pipe ventilated enclosure-(used for providing ventilation for motor) 6)flame proof enclosure-(used when motor is to be used in explosive atmosphere)
Does a Cpacitor allow ac to pass through it?
no capacitor does not allow ac component .if allow then inductor allow dc component .
