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Idling an engine for a few minutes prior to total shutdown avoids:

A - Warping engine camshafts B - Warping engine crankshafts C - Warping engine intake valves D - Warping engine exhaust valves Correct Answer(s): D Question 2:

When shutting down a compressor unit, after the engine has been slowed, the next thing that should be done is to:

A - Unload the compressor cylinders B - Idle the unit for a few minutes to cool down C - Shut off the cooling water supply D - Shut off the fuel gas cock Correct Answer(s): A Question 3:

Compressor cylinders operating on bypass may:

A - Result in warping cylinder parts B - Damage the governor C - Cause hydrates to form D - Heat up Correct Answer(s): D Question 4:

Pulling vacuum on compressor cylinders is recommended during start-up because it allows air to enter through packing and achieve maximum compression efficiency in a shorter time.

A - True B - False Correct Answer(s): B Question 5:

When starting a gas compressor, after the engine has been started, and the lubrication systems have been checked, the next step in the sequence is to:

A - Shut the starting air supply valve B - Increase the engine speed slightly when loading C - Run the engine at slow speed D - Reset the panel timer and turn the magneto switch to ON Correct Answer(s): B Question 6:

Care must be taken in sizing gas engines at altitudes above sea level because:

A - These engines are ideal for direct connecting to high speed reciprocating compressors B - Pumping stations are often in remote areas, where only gas is available for power C - These engines are available in two- and four-stroke cycle designs up to 5 000 kW D - These engines lose 8 to 10% of their sea-level rated power at 1 500 m Correct Answer(s): D Question 7:

During a typical automatic start-up of a compressor, the starting gas is usually left open after the compressor starts to prevent further shutdowns.

A - True B - False Correct Answer(s): B Question 8:

When stopping a compressor unit, turning the magneto unit to the ____ position is not recommended because the unburned gas will enter the ___________ system and ignite.

A - OFF; intake B - ON; intake C - ON; exhaust D - OFF; exhaust Correct Answer(s): D Question 9:

On naturally aspirated and turbocharged engines that are used to drive gas compressors, the fuel gas shutoff and vent valve are actuated by the safety shutdown system.

A - True B - False Correct Answer(s): A

Question 10:

Engines for gas compression services are usually equipped with which of the following shutdowns:

A - High lube oil pressure B - Low jacket water temperature C - High jacket water temperature D - Variable speed Correct Answer(s): C

Question 1: Care must be taken in sizing gas engines at altitudes above sea level because:

A - These engines are available in two- and four-stroke cycle designs up to 5 000 kW B - Pumping stations are often in remote areas, where only gas is available for power C - These engines are ideal for direct connecting to high speed reciprocating compressors D - These engines lose 8 to 10% of their sea-level rated power at 1 500 m Correct Answer(s): D Question 2: A turbocharger may increase the output of a given engine by as much as:

A - 30% B - 90% C - 50% D - 15% Correct Answer(s): C Question 3:

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