MEE 474 Final Quizizz

MEE 474 Final Quizizz

By Professor Tomforde

Open Ended

Juicy stuff first: What's your biggest gripe about MEE-474?

Test 3

Valid topics

​Journal bearings: reading the Chapter 12 charts

Gears: Understand gear ratios and forces

Doorstops: Chapter 16 material​

​

Draw

If this drum rotates clockwise, draw the direction of the friction force.

Multiple Choice

When calculating moments, use which distance?

• Parallel

• Perpendicular

• Any distance

Multiple Choice

For l/d =0.25 and S=0.2, which of these would be closest for the dimensionless film thickness?

• 0.16

• 0.6

• 0.06

• 0.85

Multiple Choice

After finding $$\frac{h_o}{c}$$  , the minimum film thickness $$h_o$$  can be calculated. What is c?

• The maximum clearance

• The minimum clearance

• The safety clearance

• FBI clearance

The clearance c is a measure of how much space is between the bushing and bearing.

​

Tolerances can be unilateral or bilateral. ​

​Tolerances

Fill in the Blanks

If a journal bearing diameter is given as 25 mm with a unilateral clearance of -0.3 mm, what is the largest size possible in mm for the bearing?

Fill in the Blanks

If a journal bearing diameter is given as 25 mm with a bilateral clearance of 0.3 mm, what is the largest size possible in mm for the bearing?

Multiple Choice

If a pinion travels at 1100 rpm clockwise and drives a larger gear that's 2.5 times its size, how quickly does the gear travel?

• 2750 rpm CCW

• 440 rpm CCW

• 2750 rpm CW

• 440 rpm CW

The gear ratio can be expressed in terms of radius, diameter, or number of teeth. ​

​

Recall that larger gears have a SLOWER angular velocity.

​Gear ratios

Open Ended

Type out or draw a picture: What are you most looking forward to this summer?