Basic Pneumatics - 1

DCV stands for 

• Directional control valves
• Direct control valves

How are the directional control valves classified?

• On the basis of number of ports
• On the basis of number of position
• Basis of number of ports and position

In a 3/2 way directional control valve,   Number 2 represents

• Position
• Port
• Both Position and port

In a 4/3 way DCV,  Number 4 represents 

• Ports
• Position
• Both Port and Position

• 2/3 directional control valve
• 4/3 directional control valve
• 3/2 directional control valve
• 3/4 directional control valve

The difference between single acting and double acting cylinders is:

• Single acting cylinders are smaller than Double acting cylinders

• Double acting cylinders have two pistons

• Work can be done in two directions in double acting cylinder unlike single acting cylinders.

This schematic diagram is called -----

• 3/2 normally Closed valve

• 3/2 normally Open valve

• Pilot Valve

Atmospheric air is compressed by a ------------

• Pump

• Compressor

• Rotary expander

• Balloon

Why is a pressure regulator used in air service unit?

• to store air

• to lubricate air

• to clean air

• none of the above

A 3/2 valve has

• 1.5 ports

• 3 ports and 2 positions

• 3 directions and 2 ports

• 5 ports and 2 positions