A manufactured air duct that meets all 15 UL 181 tests is classified as:
A) A flexible air duct.
B) Flexible air plenum.
C) Either a flexible air duct or a flexible air connector.
D) A flexible air connector.
A
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The frequency of motor lubrication depends on the type of bearing, motor application, and _____.
a. applied voltage b. service environment c. frequency of stops and starts d. motor size
A(n) ____ is the use of plants in a positive space-dominant, vertical plane
a. living installation c. oriented planting b. green wall d. “free” planting
Technician A says that removing the plug wire from a spark plug while the engine is running could damage ignition system components. Technician B says that grounding a spark plug wire while the engine is running could damage ignition system components. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
In testing DIACs with an ohmmeter, ____ resistance in either direction indicates that the device is not opened (defective).
A. zero B. high C. low D. infinite