In which situations is Type III Portland cement (PC) used?
What will be an ideal response?
Type III is high-early strength PC. It is used in concrete elements in which early removal of formwork is needed. For most precast concrete elements and in some cast-in-place concrete, the formwork is removed within 24 hours, requiring the use of Type III PC.
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Describe the different types of islands used in channelizing at-grade intersections indicating the principal function of each type.
What will be an ideal response?
Understand the purpose of the following mechatronic system and recommend an appropriate sensor and actuator to carry out the specified task.
a. Temperature Control System Purpose: To maintain the temperature of a confined space at the specified temperature. (Hint: Decide how to sense the temperature. Decide how to increase or decrease temperature.) b. Anti-lock Braking System Purpose: To prevent wheel lock-up by automatically modulating the brake pressure during an emergency stop. (Hint: Decide how to sense that the wheels are locked (i.e.: the wheels are not rolling). Decide how to apply or release brakes.) What will be an ideal response?
Briefly explain the cooling technique provided by a totally enclosed, fan-cooled (TEFC) motor.
What will be an ideal response?
Carry the answer to four decimal places. How much larger is the diameter of number 11 wire than that of number 16 wire?
Fill in the blank(s) with the appropriate word(s).