An air compressor can be unloaded at...

Question 1 / 205eccef9bbacbc34ba4d4557e

Question 1 of 205eccef9bbacbc34ba4d4557e

An air compressor can be unloaded at start-up by __________.

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Question 1 of 20

5eccef9bbacbc34ba4d4557e

An air compressor can be unloaded at start-up by __________.

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🔍 Key Concepts

• compressor unloading and what it means for starting torque on the prime mover • difference between controlling pressure in the system versus reducing actual compression work in the cylinders • how clearance volume affects compressor capacity and power needed

💭 Think About

• Ask yourself: which option actually prevents the compressor from doing much compression work during start-up, rather than just giving the air somewhere to go? • Think about multi-stage versus single-stage compressors: which choice only applies to certain designs, and which could be a built-in method of reducing load? • Consider how changing the effective compression space (clearance) in a cylinder will change the volume of air taken in and compressed each stroke.

✅ Before You Answer

• Be clear on the definition of "unloaded" for a compressor: almost no compression work and low starting torque, not just low discharge pressure. • Check which options would still require the motor to compress air each stroke, even if the air is then vented or sent somewhere else. • Verify in your mind how an enlarged clearance space changes volumetric efficiency and therefore the load on the compressor.

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Question 1 of 20

An air compressor can be unloaded at start-up by __________.

holding the discharge valve open

relieving the intercooler pressure to the atmosphere

using an enlarged, permanently opened clearance expansion space

a precharged accumulator

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Question 1 / 205eccef9bbacbc34ba4d4557e

Question 1 of 205eccef9bbacbc34ba4d4557e

An air compressor can be unloaded at start-up by __________.

Back

Question 1 of 20

5eccef9bbacbc34ba4d4557e

An air compressor can be unloaded at start-up by __________.

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed