Which of the following is a visual indicator of a possible collapse?
A) Moaning or groaning sounds
B) Heavy snow conditions on the roof
C) Pitched or sagging floors
D) Sustained moderate to heavy fire conditions
C) Pitched or sagging floors
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The speed of a three-phase squirrel cage induction motor is controlled by the frequency of the applied voltage and _____.
a. voltage dropping resistors b. the number of poles c. full-load torque d. armature current
Which of the following is a measure of combustion efficiency?
A) O2 B) CO C) HC D) CO2
El componente etiquetado con el número 1 en la Figura 2 es:
a. un sello de extremo.
b. una conexión de energía.
c. una conexión de empalme/T.
d. un termostato.
The structural behavior of a contemporary load-bearing masonry wall building is similar to that of _______.
A) a conventional wood light-frame building. B) a steel-frame building. C) a precast-concrete frame building. D) a site-cast reinforced-concrete frame building. E) none of the above.