In the earlier days of V-belts, some shops used belt dressings to help a belt to grip. Do you think there was a problem with this? Give reasons for your answer.
What will be an ideal response?
The problem with these substances is that they were sticky and attracted dirt, which caused accelerated wear to the pulley groove. Some belt dressings would also attack and damage the belt material.
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In the process of producing engine valves, the valves are subjected to a first grind. Valves whose thicknesses are within the specification are ready for installation. Those valves whose thicknesses are above the specification are reground, while those whose thicknesses are below the specification are scrapped. Assume that after the first grind, 70% of the valves meet the specification, 20% are reground, and 10% are scrapped. Furthermore, assume that of those valves that are reground, 90% meet the specification, and 10% are scrapped.
a. Find the probability that a valve is ground only once. b. Given that a valve is not reground, what is the probability that it is scrapped? c. Find the probability that a valve is scrapped. d. Given that a valve is scrapped, what is the probability that it was ground twice? e. Find the probability that the valve meets the specification (after either the first or second grind). f. Given that a valve meets the specification (after either the first or second grind), what is the probability that it was ground twice? g. Given that a valve meets the specification, what is the probability that it was ground only once?
In the construction of a perspective view, a line that extends from the object to the vanishing point to help establish the location of horizontal points on the drawing is known as a(n) _________________________.
Fill in the blank(s) with the appropriate word(s).
There are two types of ammeters used in the industry today: the clamp-on ammeter and the ____________________.
Fill in the blank(s) with the appropriate word(s).
Two common pressure-sensing devices used in pressure controls are:
A) Capacitive transducer and thermistor. B) Sail switch and warp switch. C) Strain gauge and expansion tube. D) The bellows and the diaphragm.