List various methods of detecting fires.
What will be an ideal response?
A varietyof signal sources act as alarm initiating systems by sensing theproducts of combustion at different stages of a fire's duration. Ionization detectors can detect microscopic particles emitted during the early stages of a fire. Photoelectric detectors use beams of light to respond to smoke particles visible to the naked eye during development of a fire. Heat detectors sense the actual fire toimmediately activate alarm and fire suppression systems. Fire flame detectors are usedin occupancieswhere combustible materials that may burn are present. They detect the presence of either infrared or ultraviolet radiation.
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What are the categories used by ISO for industrial robot classification?
What will be an ideal response?
____ waterproofing sheets are frequently used for projects in which waterproofing must be of uncompromised security.
A. Lead B. Cement-based C. Bentonite clay D. Chlorinated polyethylene
People who maintain a positive and learning-oriented attitude have a more malleable brain.
Answer the following statement true (T) or false (F)
Some motors intended for ____ operation contain two separate shunt fields; one field is connected to a variable voltage power supply, and the other is connected to a constant voltage power supply.
a. overspeed b. normal c. intermittent d. underspeed