Magnets that retain only a small portion of their magnetic properties are called ____.
A. artificial magnets
B. electromagnets
C. permanent magnets
D. temporary magnets
Answer: D
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A(n) ____ may be used to prohibit the contractor from subcontracting work to nonunion firms for a particular labor classification.
A. union earmark B. journeyman stipulation C. subcontractor clause D. dual gate provision
Pick the following feature that remains unsectioned even if the cutting plane line passes through parallel to its axis.
a. shaft b. bolt c. spoke d. all of the above
The inner and outer surfaces of a 0.5-cm thick 2-m × 2-m window glass in winter are 10°C and 3°C, respectively. If the thermal conductivity of the glass is 0.78 W/m•K, determine the amount of heat loss through the glass over a period of 5 h. What would your answer be if the glass were 1 cm thick?
What will be an ideal response?
A disconnecting means is not required for appliances installed in a basement if ____.
A. the branch-circuit is rated for a load of 20-amperes B. there is a branch-circuit switch or circuit breaker can be locked in the open (on) position C. the branch-circuit switch or circuit breaker is within 50 ft and can be seen while working on the appliance D. the branch-circuit contains three or more branches