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How many types of compressors are there? There are different types of compressors: displacement, screw, rotary and centrifugal compressors.

What cylinder may the compressor be? The compressor may be a twin-cylinder, a triple-cylinder and multi-cylinder.

Where is the suction strainer located? The suction strainer is located in the square box which is cast on the rear end of the cylinder block.

Why is a magnet fitted inside the strainer basket? A magnet is fitted inside the strainer basket to assist in collecting any metallic fragments which may enter.

Where are both delivery and suction valves mounted? Both delivery and suction valves are mounted on the valve plate, the delivery valves on the upper side and the suction valves on the under side.

Where is the delivery port? The delivery port is on the side of the cylinder block.

What are the connecting rods? The connecting rods are steel stampings.

What are the bottom ends lined with? The bottom ends are lined with white metal.

Where is the crankshaft carried? The crankshaft is carried on two main bearings housed in the crank-case at the rear end and in the gland box at the front end.

Where are thrust washers placed? Thrust washers are placed at the end of the crankshaft to take end thrust.

What are they made from? They are made of special oil hardened steel.

How are these compressors lubricated? These compressors are lubricated by means of oil supplied from the oil pump spirals on the crankshaft and by splash.

Why a pure mineral oil of the following specification should be used? As an unsuitable oil may cause trouble, a pure mineral oil of the following specification should be used.

What is the compressor normally driven by? The compressor is normally driven by an electric motor.

Under what circumstances should the direction of rotation be altered? Under no circumstances should the direction of rotation be altered.