Page 186 - Mechanic Diesel - TT

MECHANIC DIESEL - CITS

A Common Hose

A common hose typically refers to a Garden hose, which is used for watering plant, lawns, and gardens. These
hoses are usually made of flexible rubber and come in various lengths and diameters to suit different needs.
They often have standard fittings for connecting to outdoor equipment
B Molded Hose
Molded hoses are rubber hoses that are shaped to fit specific applications in vehicles or other systems. They
are commonly used in automotive applications for coolant, air intake, and other fluid systems. These hoses
are made by molding rubber into the desired shape, which allows for more precise fitting and often better
performance compared to traditional straight hoses with multiple bends or fittings.
C Accordion Type
Accordion-type hoses are flexible hoses that expand and contract, similar to an accordion musical instrument,
hence the name. These hoses are often used in gardening or for other outdoor tasks where a flexible,
lightweight hose is beneficial.
Types of water pump
Water Pump

Centrifugal type water pump is used in engines. It is located towards the front of the cylinder block or head. The
water pump fan is driven by a belt from the camshaft pulley. The impeller is fitted at one end of the water pump
shaft.
The shaft is fitted with a bearing in the pump housing. A water seal is installed in the pump to prevent water from
entering the bearings and to prevent water leakage. When the propeller rotates, it draws water from the lower tank
of the radiator and delivers the water under pressure to the engine block through centrifugal force.

Types of water pump in automobile
There are primarily two types of water pumps used for cooling the engine
Electric Water Pump: Some modern vehicles use electric water pumps. These pumps are driven by an electric
motor and can vary their speed based on engine needs, providing more precise control over the cooling system.
Both types of water pumps serve the same purpose of cooling the engine, but they differ in their design and
method of operation.
In electrical water pump

Submersible Pumps: These pumps are designed to be submerged in the water they are pumping. They are
often used in wells and deep water applications. Submersible pumps are efficient and require less maintenance
than other types of pumps.
Diaphragm Pumps: These pumps use a diaphragm to move water. They are often used in applications where a
continuous flow of water is not required, such as in spraying systems or for transferring water from one container
to another.
Jet Pumps: Jet pumps use an impeller to create a vacuum which then draws water into the pump. They are often
used in shallow wells or for applications where a centrifugal pump would not be suitable.

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CITS : Automotive - Mechanic Diesel - Lesson 47 - 56 CITS : Automotive - Mechanic Diesel - Lesson 47 - 56