Are You Smarter than an Undergraduate? August 2021 - NoonPi

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Are You Smarter than an Undergraduate? August 2021KHudspeth2024-09-05T12:24:02-04:00

Are you smarter than an undergraduate

PDHengineer's monthly quiz for engineers

Will this month’s quiz be a walk in the park? Here’s the August 2021 Pop Quiz for Engineers. Are you smarter than an undergraduate?

Question 1: Under what circumstances must an excavation be tested for hazardous atmospheres by a competent person before an employee is allowed to enter?
- In all cases
- When it is deeper than 4 feet
- When an oxygen deficiency could be reasonably expected
- Both B and C

Question 2: If the Froude number in an open channel is less than 1, the flow is ________.
- Critical
- Supercritical
- Subcritical
- None of the above

Question 3: Which of the following actions can prevent cavitation damage to a control valve?
- Use a valve with a high recovery coefficient
- Increase the downstream pressure by installing a flow restrictor downstream of the valve
- Reduce the downstream pressure by installing an expander downstream of the valve
- Undersize the valve by 50%

Question 4: Relative to gland packing, mechanical seals generally _____________.
- Provide lower frictional drag
- Have a higher upfront cost
- Require more periodic maintenance
- All of the above

Question 5: What form of hydroelectric power plant would typically have a very large reservoir?
- Impoundment
- Diversion
- Run of the river
- Wave plant

Question 6: For most large centrifugal fans (excluding "non-overloading fan types"), the fan should be started ___________ to minimize the required starting current.
- With the downstream dampers closed
- With the downstream dampers 50% open
- With the downstream dampers 75% open
- Trapezoidal

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