What is the derived quantity name for an electrical charge?
A. Coulomb
B. Ohm
C. Siemens
D. Newton
A
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The speed of the synchronous motor used to sense time is proportional to its number of poles and the ____-hertz line frequency.
A. 40 B. 50 C. 60 D. 70
Complex electrical systems are controlled by state and local building codes and the ____________________ Code®.
What will be an ideal response?
Find a 99% confidence interval for the difference in the mean strengths between threads treated for 60 seconds and those treated for 120 seconds.
In an experiment involving the breaking strength of a certain type of thread used in personal flotation devices, one batch of thread was subjected to a heat treatment for 60 seconds and another batch was treated for 120 seconds. The breaking strengths (in N) of ten threads in each batch were measured. The results were 60 seconds: 43 52 52 58 49 52 41 52 56 54 120 seconds: 59 55 59 66 62 55 57 66 66 51
A soaking period at high temperature is needed to:
A) Insure a complete mixture of austenite before quenching B) Convert a shallow hardening steel into a deeper hardening steel C) Completely carburize the surface of the metal so it will fully harden when quenched D) Complete the dispersion of carbon atoms and equalize internal temperature