The usual method of unloading a low-pressure...

The usual method of unloading a low-pressure...

Question 1 of 270705eccef9bbacbc34ba4d4557c

The usual method of unloading a low-pressure air compressor at start-up is accomplished by __________.

Question 1 of 27070

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Q

The usual method of unloading a low-pressure air compressor at start-up is accomplished by __________.

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🔍 Key Concepts

• How starting a low-pressure air compressor under load affects the electric motor or prime mover • Methods used to "unload" a reciprocating compressor during start-up • What happens inside the compressor when the suction valve or discharge valve is held open

💭 Think About

• Think about which action would reduce or eliminate compression work during the initial revolutions of the compressor • Consider what happens to air trapped in the cylinder if the discharge side is held open versus the suction side • Ask yourself which method is commonly built into compressor unloaders for simple, reliable automatic operation

✅ Before You Answer

• Verify which option actually prevents a pressure rise in the cylinder during the compression stroke • Check which valve (suction or discharge) being held open would make the piston move air with minimal resistance • Eliminate any choice that would still force the compressor to work against receiver pressure during start-up