IDENTIFY TEST PROCESS SYMBOLS AND DIAGRAMS
Ammeter
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ASTM specifications classify masonry mortar into Type M, Type S, Type N, and Type O. The mortar can be specified based on the volume proportions of its three ingredients (Portland cement, lime, and sand) or based the mortar's strength. In which situations is strength specification used?
What will be an ideal response?
In slip-form construction, the concrete is contained and shaped by a form that is moved _____.
a. along a track b. continuously c. up and down d. intermittently
Compute the countercurrent traveling time of the induction machine assuming that the motor is running at no load.
A 480 V, 60 Hz, three-phase induction motor has a rated speed at full load of 1720 rpm, stator resistance of 1 ?, rotor resistance of 1 ?, and equivalent winding reactance of 4 ?. Compute the starting time of the motor at no load and at full voltage and frequency. The inertia of the motor is 3 Nm sec2.
When light strikes the PN junction of a photodiode, current flows in a __________ direction.
A. forward-biased B. reverse-biased