chapter 5 Hydraulic Symbols and
Schematics
Both A and B - answerTechnician A says that a circle symbol on a hydraulic schematic
can represent a hydraulic pump. Technician B says that a circle symbol on a hydraulic
schematic can represent a hydraulic motor. Who is right?
Hydraulic pump - answerWhat does a circle symbol with the triangle pointing outward
indicate?
Technician A only - answerTechnician A says that dashed lines on a hydraulic
schematic indicate a pilot line that connects a control circuit to a slave circuit.
Technician B says that dotted lines are used in schematics to indicate a line under
constant pressure. Who is right?
diamond - answerWhat symbol shape is used to indicate a heat exchanger?
Both A and B - answerTechnician A says that arrows are used to show the direction of
fluid flow in hydraulic schematics. Technician B says that arrows are used to show the
rotational direction of pumps and motors in hydraulic schematics. Who is right?
Technician A only - answerTechnician A says that hydraulic oil is not compressible.
Technician B says that hydraulic oil is less compressible than water. Who is right?
Neither A nor B - answerTechnician A says that an accumulator is represented on a
hydraulic schematic by a rectangle, rounded at the corners. Technician B says that a
control valve is represented on a hydraulic schematic by an oval shape. Who is correct?
The large-diameter cylinder produces more force. - answerIf equal pressure is applied
to a large-diameter cylinder and a small-diameter cylinder, which of the two will produce
more force?
Heat exchanger - answerWhich component is represented by a diamond-shaped
symbol with solid colored triangles on the top and bottom connected by a vertical line?
Two hydraulic lines are connected. - answerWhat is represented on a schematic by a
pair of unbroken, intersecting lines with a dot at the intersection point?
All the spools - answerOn an open-center multispool control valve, where does pump oil
travel to when in the neutral position?
Schematics
Both A and B - answerTechnician A says that a circle symbol on a hydraulic schematic
can represent a hydraulic pump. Technician B says that a circle symbol on a hydraulic
schematic can represent a hydraulic motor. Who is right?
Hydraulic pump - answerWhat does a circle symbol with the triangle pointing outward
indicate?
Technician A only - answerTechnician A says that dashed lines on a hydraulic
schematic indicate a pilot line that connects a control circuit to a slave circuit.
Technician B says that dotted lines are used in schematics to indicate a line under
constant pressure. Who is right?
diamond - answerWhat symbol shape is used to indicate a heat exchanger?
Both A and B - answerTechnician A says that arrows are used to show the direction of
fluid flow in hydraulic schematics. Technician B says that arrows are used to show the
rotational direction of pumps and motors in hydraulic schematics. Who is right?
Technician A only - answerTechnician A says that hydraulic oil is not compressible.
Technician B says that hydraulic oil is less compressible than water. Who is right?
Neither A nor B - answerTechnician A says that an accumulator is represented on a
hydraulic schematic by a rectangle, rounded at the corners. Technician B says that a
control valve is represented on a hydraulic schematic by an oval shape. Who is correct?
The large-diameter cylinder produces more force. - answerIf equal pressure is applied
to a large-diameter cylinder and a small-diameter cylinder, which of the two will produce
more force?
Heat exchanger - answerWhich component is represented by a diamond-shaped
symbol with solid colored triangles on the top and bottom connected by a vertical line?
Two hydraulic lines are connected. - answerWhat is represented on a schematic by a
pair of unbroken, intersecting lines with a dot at the intersection point?
All the spools - answerOn an open-center multispool control valve, where does pump oil
travel to when in the neutral position?
