Which coupling requires no lubricant?
A. gear. B. chain. C. rubbertire. D. flexible grid.
C
You might also like to view...
Mechanical insulators should be aware that when fabricating jacketing for vessels, _____.
a. manual cutting is practical for only the lighter-gauge metals b. only sheet-metal workers are allowed to fabricate sheet-metal jacket c. all modern sheet-metal cutting machines are now computer controlled d. they are expected to estimate, cut, and form all insulation jacket as needed
The lubrication of a motor at prescribed intervals can be accomplished using a _____.
a. countdown clock b. bimetallic relay c. timing relay d. mechanical interlock
Which of the following statements is LEAST-Likely true?
A. Block castings can be distorted when heads and main cap bolts are torqued. B. A boring stand is desirable for reboring and honing blocks. C. Cylinders can be up to 0.012" out-of-round when the block is hung from one end on a conventional universal engine stand. D. Boring cylinders with a portable boring bar while the block is mounted to one of these stands can produce oval-shaped cylinders.
If a closed-loop servo system is in a balanced condition, the feedback signal will __________ if the set point changes.
A. increase B. decrease C. either a or b