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Induction motors are simple, rugged and reliable, and have no:

A - Moving parts B - Limit to the applications for which they may be used C - Rotating windings D - Bearings requiring lubrication Correct Answer(s): C Question 9: A naturally aspirated integral engine has which of the following components in its fuel system?

A - A vaporizer B - An atomizer C - A carburetor D - A fuel-mixing valve Correct Answer(s): D

Question 10:

One advantage of turbocharging an engine used to drive a compressor is that the:

A - Total heat rejection to the jacket water is increased approximately 30% more than a naturally aspirated engine B - Total heat rejection to the jacket water is reduced approximately 30% less than a naturally aspirated engine C - Thermal efficiency is improved but fuel consumption is increased D - Thermal efficiency is improved and fuel consumption is reduced Correct Answer(s): D Question 1:

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 - Increase the engine speed slightly when loading B - Run the engine at slow speed C - Reset the panel timer and turn the magneto switch to ON D - Shut the starting air supply valve

Correct Answer(s): A Question 2: In plants where steam is available at a premium,______________ utilizing ________________ rates are used.

A - multistage turbine; low steam B - single stage turbine; high steam C - multistage turbine; high steam D - single stage turbine; low steam Correct Answer(s): A Question 3: A naturally aspirated integral engine has which of the following components in its fuel system?

A - A carburetor B - A vaporizer C - An atomizer D - A fuel-mixing valve Correct Answer(s): D Question 4: Where gas is readily available and a high-speed, direct connection to a centrifugal compressor is desirable, the most practical compressor driver to install is a/an:

A - Steam turbine B - Gasoline engine C - Gas turbine D - Induction motor Correct Answer(s): C Question 5: When shutting down a compressor unit, after the engine has been slowed, the next thing that should be done is to:

A - Shut off the cooling water supply B - Idle the unit for a few minutes to cool down C - Unload the compressor cylinders D - Shut off the fuel gas cock Correct Answer(s): C Question 6:

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 7: Induction motors are simple, rugged and reliable, and have no:

A - Moving parts B - Limit to the applications for which they may be used C - Bearings requiring lubrication D - Rotating windings Correct Answer(s): D Question 8:

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 9: One advantage of turbocharging an engine used to drive a compressor is that the:

A - Thermal efficiency is improved and fuel consumption is reduced B - Thermal efficiency is improved but fuel consumption is increased C - Total heat rejection to the jacket water is reduced approximately 30% less than a naturally aspirated engine D - Total heat rejection to the jacket water is increased approximately 30% more than a naturally aspirated engine Correct Answer(s): A Question 10:

A turbocharger is driven by:

A - A separate motor B - Belts connected to the engine crankshaft C - The exhaust gas of the engine D - Engine lubricating oil pressure Correct Answer(s): C Question 1: Engines for gas compression services are usually equipped with which of the following engine protection shutdowns:

A - Low jacket water temperature B - High lube oil pressure C - Overspeed D - Fuel pressure Correct Answer(s): C Question 2: In most cases, the choice of the appropriate driver for a gas compressor is ultimately determined by the:

A - Type or source of available power B - Nature of the gas being compressed C - Horsepower requirements D - Compression ratio of the compressor Correct Answer(s): A Question 3: A compressor log book should include:

A - Readings such as temperatures and pressures B - Details of maintenance work C - Any unusual conditions experiences D - All of the above Correct Answer(s): D Question 4: Where gas is readily available and a high-speed, direct connection to a centrifugal compressor is desirable, the most practical compressor driver to install is a/an:

A - Gasoline engine B - Gas turbine C - Steam turbine D - Induction motor Correct Answer(s): B Question 5: One advantage of turbocharging an engine used to drive a compressor is that the:

A - Total heat rejection to the jacket water is reduced approximately 30% less than a naturally aspirated engine B - Thermal efficiency is improved but fuel consumption is increased C - Thermal efficiency is improved and fuel consumption is reduced D - Total heat rejection to the jacket water is increased approximately 30% more than a naturally aspirated engine Correct Answer(s): C Question 6: Idling an engine for a few minutes prior to total shutdown avoids:

A - Warping engine exhaust valves B - Warping engine camshafts C - Warping engine intake valves D - Warping engine crankshafts Correct Answer(s): A Question 7: 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 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; exhaust B - ON; exhaust C - ON; intake D - OFF; intake Correct Answer(s): A Question 9:

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 - Shut off the fuel gas cock C - Idle the unit for a few minutes to cool down D - Shut off the cooling water supply Correct Answer(s): A Question 10: The most widely used compressor driver in the low power range is the:

A - Gas turbine B - Synchronous motor C - Squirrel cage induction motor D - Steam turbine Correct Answer(s): C Question 1: In a natural gas-powered engine used to run a compressor, the oil temperature is usually controlled by a ___________________ that has the engine _________________ circulating through it.

A - shell and tube heat exchanger; crankcase oil B - pipe coil heat exchanger; crankcase oil C - pipe coil heat exchanger; jacket water D - shell and tube heat exchanger; jacket water Correct Answer(s): D Question 2:

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; exhaust B - ON; intake C - ON; exhaust D - OFF; intake Correct Answer(s): A Question 3: Where gas is readily available and a high-speed, direct connection to a centrifugal compressor is desirable, the most practical compressor driver to install is a/an:

A - Induction motor B - Steam turbine C - Gas turbine D - Gasoline engine Correct Answer(s): C Question 4: In most cases, the choice of the appropriate driver for a gas compressor is ultimately determined by the:

A - Type or source of available power B - Nature of the gas being compressed C - Compression ratio of the compressor D - Horsepower requirements Correct Answer(s): A Question 5:

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 6:

A turbocharger may increase the output of a given engine by as much as:

A - 50% B - 30% C - 90% D - 15% Correct Answer(s): A Question 7:

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