Mechanical Systems pt. 2

P. 2-25: A coupling that is not aligned can cause the machine to:

• smoke

• miss parts

• lose weight

• vibrate

P. 2-24: What is an overload clutch designed for?

• to transmit high torque under condition of severe misalignment

• allow springs to be replaced without moving the hubs from shaft

• protect equipment if something jams or binds in the machinery

• eliminate the need to realign the couplings after reassembly

P. 25: Which type of coupling listed allows for only minor misalignment?

• Universal Joint Couplings

• Clutch-Style Couplings

• Pin and Disk Couplings

• Spring Couplings

P. 29: Josie is checking shaft alignment using a dial indicator. The dial indicates that the there is vertical misalignment, so she adjusts the shaft pump before removing the dial indicator. What did she do wrong?

• forgot to remove the dial indicator before adjustment

• adjusted the shaft pump after measurement

• removed the dial indicator when it should have stayed connected

• should have used laser alignment tool instead

P. 2-33: A V-belt pulley will show that it needs replacement when:

• the belt touches the bottom of the pulley groove

• the belt screeches loudly

• the system starts to smoke

• the bottom of the groove is completely smooth

P. 2-58: You come to work and find a puddle of something on the floor. You should:

• tell your supervisor

• call the janitor to clean it up

• grab a paper towel and get busy

• try not to track it on the floor

P. 2-59: When the temperature goes up,, the viscosity of an oil:

• stays about the same

• goes up a bit

• changes rapidly

• goes down slightly

The worst enemy of a hydraulic system would be:

• sunshine

• snow

• contamination

• air

P. 2-58: When a bearing seizes on a shaft, the most likely cause is:

• lack of lubrication

• bearing fright

• overloading

• cracked journals

P. 2-30: When a dial indicator shows high run out during rotation of a motor shaft, the first step is to check for:

• bent shaft

• soft foot

• broken indicator

• lack of lubrication