Bissoy.com
Doctors Medicines MCQs Q&A

Circulating water around the cylinder, which helps the air to cool during compression, is called:

Circulating water around the cylinder, which helps the air to cool during compression, is called: Correct Answer water jacketing

Explanation:

A system, which controls the engine temperature, is known as a cooling system.

The necessity of a cooling system

The cooling system is provided in the IC engine for the following reasons:

• The temperature of the burning gases in the engine cylinder reaches up to 1500 to 2000°C, which is above the melting point of the material of the cylinder body and head of the engine. (Platinum, a metal which has one of the highest melting points, melts at 1750 °C, iron at 1530°C and aluminium at 657°C.) Therefore, if the heat is not dissipated, it would result in the failure of the cylinder material.

• Due to very high temperatures, the film of the lubricating oil will get oxidized, thus producing carbon deposits on the surface. This will result in piston seizure.

• Due to overheating, large temperature differences may lead to a distortion of the engine components due to the thermal stresses set up. This makes it necessary for, the temperature variation to be kept to a minimum.

• Higher temperatures also lower the volumetric efficiency of the engine.

Types of cooling system

There are two types of cooling systems:

(i) Air cooling system

(ii) Water-cooling system.

Now,

The main parts in the water-cooling system are:

i) Water Pump - This is a centrifugal type pump. It is centrally mounted at the front of the cylinder block and is usually driven by means of a belt.

ii) Fan -  It is generally mounted on the water pump pulley, although on some engines it is attached directly to the crankshaft

iii) Radiator - The purpose of the radiator is to cool down the water received from the engine.

iv) Thermostat Valve - It is a kind of check valve which opens and closes with the effect of temperature.

v) Water Jackets: In this water is circulated around the cylinder to help for cooling the air during compression.

The other main parts include temperature gauge and hose pipes.

Related Questions

“What is the different between height and radius of solid cylinder?” Which of the following option is sufficient alone to find the answer? A) A solid cylinder is made by melting a solid sphere. The radius of cylinder is 3 times the radius of a circle whose area is 154 sq.m. Height of cylinder is equal to the height of cone whose volume is 2772 cubic meters. B) Area of a rectangle whose longer side is ¾ times the radius of a solid cylinder, is 168 sq.m and, Volume of solid cylinder is 2772 cubic meters and its height is 18 m. C) A metallic cone of radius 15m and height 35m is melted into the solid cylinder of radius equal to the radius of a circle whose area is equal to the area of rectangle whose sides are in the ratio 4 : 3 respectively. D) The curved surface area of the solid cylinder is 3 time the surface area of a sphere of radius 7m and height of cylinder is equal to the height of a metallic cone whose curved surface area is 308 sq.m. 
If p₁, is the pressure of air entering the L.P. cylinder and p₂ is the pressure of air leaving the L.P. cylinder (or inter-cooler pressure), then the ratio of cylinder diameters for a single acting, two stage reciprocating air compressor with complete intercooling is given by (where D₁ = Dia. of L.P. cylinder, and D₂ = Dia. of H.P. cylinder)
If p1, is the pressure of air entering the L.P. cylinder and p2 is the pressure of air leaving the L.P. cylinder (or inter-cooler pressure), then the ratio of cylinder diameters for a single acting, two stage reciprocating air compressor with complete intercooling is given by (where D1 = Diameter of L.P. cylinder and D2 = Diameter of H.P. cylinder)
In the following question, sentences of a paragraph have been jumbled and labelled as A, B, C and D. You are required to rearrange the jumbled sentences of the paragraph and mark your response accordingly by selecting the correct option. A: Air conditioning is the process of removing heat and moisture from the interior of an occupied space to improve the comfort of occupants. Air conditioning can be used in both domestic and commercial environments.  B: Electric refrigerant-based AC units range from small units that can cool a small bedroom, which can be carried by a single adult, to massive units installed on the roof of office towers that can cool an entire building. C: Air conditioners often use a fan to distribute the conditioned air to an enclosed space such as a building or a car to improve thermal comfort and indoor air quality.  D: This process is most commonly used to achieve a more comfortable interior environment, typically for humans and other animals.
An air conditioner can cool the hall in 40 miutes while another takes 45 minutes to cool under similar conditions. If both air conditioners are switched on at same instance then how long will it take to cool the room approximately ?
In air-conditioning systems, air may be cooled and dehumidified by 1. Spraying chilled water to air in the form of fine mist. 2. Circulating chilled water or brine in a tube placed across the air flow 3. Placing the evaporator coil across the air flow. Which of the above statements are correct?
While teaching the correct method of measuring the volume of a solid using a measuring cylinder Kavita mentions the following steps (not in the correct sequence) to be followed: a. Note the reading of the level of water in cylinder b. Suspend the solid with a thread inside water in the cylinder c. Record the least count of the measuring cylinder d. Put sufficient water in the cylinder and note the reading Which one of the following is the correct sequence of steps for the said purpose?
In the following passage, some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of the four alternatives. Let us examine the facts in the case more ____________. First of all, language is no more ____________ a medium; it is like air to the creatures of the land or water to fishes. If it is perfectly clear and pure, we do not notice it any more than we notice pure air when the sun is shining ________ a clear sky, or the taste of pure cool water when we drink a glass __________ a hot day. Unless the sun is shining, there is no brightness; unless the water is cool, there is __________ refreshment. in the case more ____________. First of all
In the following passage, some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of the four alternatives. Let us examine the facts in the case more ____________. First of all, language is no more ____________ a medium; it is like air to the creatures of the land or water to fishes. If it is perfectly clear and pure, we do not notice it any more than we notice pure air when the sun is shining ________ a clear sky, or the taste of pure cool water when we drink a glass __________ a hot day. Unless the sun is shining, there is no brightness; unless the water is cool, there is __________ refreshment. no more ____________ a medium;
In the following passage, some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of the four alternatives. Let us examine the facts in the case more ____________. First of all, language is no more ____________ a medium; it is like air to the creatures of the land or water to fishes. If it is perfectly clear and pure, we do not notice it any more than we notice pure air when the sun is shining ________ a clear sky, or the taste of pure cool water when we drink a glass __________ a hot day. Unless the sun is shining, there is no brightness; unless the water is cool, there is __________ refreshment. sun is shining ________ a clear sky,