Cuando se colocan engan- ches de elevación en la forma, _____.
a. simplemente se sitúan en
la forma
b. se fijan a la barra de
refuerzo
c. se anclan al lecho de
colada
d. se conectan a grilletes
Answer: B
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Self-regulating cables are referred to as _____.
a. monolithic cables b. power-limiting heating cables c. parallel-resistance heating cables d. constant-wattage heating cables
Which of the following fluids transfers heat most efficiently?
A. distilled water B. EG C. ELC D. PG
Fancy fish, such as _____, are a growing segment of the aquaculture industry
A) trout B) prawns C) koi D) catfish
Calculate the following:
A three-phase, six-pole, Y-connected, 60 Hz, 480 V induction motor is driving a 300 Nm constant-torque load. The motor has rotational losses of 1 kW. The motor is driven by a slip energy recovery system. The triggering angle of the dc/ac converter is adjusted to 100o a. Motor speed b. Current in the dc link c. Rotor rms current d. Stator rms current e. Power returned back to the source