Because of its stiffness, a folding rule is better than a cloth or steel tape for measuring _____
a. vertical distance
b. horizontal distance
c. inside dimensions
d. circular diameters
a
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Two effects of vibration on personnel are:
What will be an ideal response?
PROBLEM 3.C1 Shaft AB consists of n homogeneous cylindrical elements, which can be solid or hollow. Its end A is fixed, while its end B is free, and it is subjected to the loading shown. The length of element i is denoted by its outer diameter by its inner diameter by its modulus of rigidity by and the torque applied to its right end by the magnitude of this torque being assumed to be positive if is counterclockwise from end B and negative otherwise. (Note that if the element is solid.) (a) Write a computer program that can be used to determine the maximum shearing stress in each element, the angle of twist of each element, and the angle of twist of the entire shaft. (b) Use this program to solve Probs. 3.35, 3.36, and 3.38.
The combustion chamber is the space between the top of the piston and the cylinder head.
Answer the following statement true (T) or false (F)
An on/off start-up signal governs the compressor motor of a large commercial air conditioning unit. In general, the start-up signal should be on whenever the output of a temperature sensor S exceeds a reference temperature. However, you are asked to limit the compressor start-ups to certain hours of the day and also enable service technicians to start up or shut down the compressor through a manual override. A time-of-day indicator D is available with on/off outputs, as is a manual override switch M. A separate timer T prohibits a compressor start-up within 10 min of a previous shutdown. Design a logic diagram that incorporates the state of all four devices (S, D, M, and T ) and produces the correct on/off condition for the motor start-up.
What will be an ideal response?