lesson 1

Question 1

is the process of cooling by removing heat in an enclosed space and maintaining the temperature lower than ambient temperature

Answer 1

REFRIGERATION

Question 2

is one process of refrigeration. Aside from cooling and maintaining a low temperature in an enclosed space, it also involves conditioning of the air such as; humidity, air motion, cleaning, filtering, and even sanitizing the air.

Answer 2

AIR-CONDITIONING

Question 3

are used to loosen bolts and nuts. They are open-end, box-end, adjustable, socket, and Allen wrench.

Answer 3

Wrenches

Question 4

are used to drive and loosen screws. They are classified as flat head, Philip’s head, and socket head screw drivers.

Answer 4

Screw drivers

Question 5

are used for cutting metals in jobs such as breaking rivets and splitting nuts

Answer 5

Cold Chisels

Question 6

What are the different types of cold chisels

Answer 6

Diamond Cut chisel
Flat Chisel
Half round chisel
Cross cut/ cape chisel

Question 7

are tools used for holding objects by the grip of hand. They are classified as mechanical pliers, long nose pliers, slide side cutting pliers, and vise grip.

Answer 7

Pliers

Question 8

are tools used to cut tubings made of copper, aluminum or steel. As the tool is turned, a sharp wheel cuts into tubing. Pressure is gradually increased until the tube is cut-off clearly and squarel

Answer 8

Tube cutters

Question 9

are tools used to flare the end of the tube to hold the flare nut

Answer 9

Tube flaring tools

Question 10

a special kind of tool used to bend copper tubing in order not to bring the angle or side of the tube.

Answer 10

Tube bending tools

Question 11

are tools used to expand the end of the tubes of the same diameter for the purpose of making joints by soldering or brazing.

Answer 11

Tube swaging tools

Question 12

a gasoline torch used for heating solder in soldering or brazing process to join two tubes together

Answer 12

Blow torch

Question 13

equipment used in welding, cutting, and brazing. It is able to produce a very high intensity of heat from a combination of oxygen gas and acetylene fuel.

Answer 13

Oxy-acetylene welder

Question 14

is a Freon tank intended for servicing and recharging refrigerators and air-conditioning units. It has a limited capacity

Answer 14

Service Tank

Question 15

a flexible hose attached to the service tank and gauges during the charging process

Answer 15

Service hose

Question 16

a special kind of gauge intended to measure the pressure and the amount of refrigerant (Freon) inside the system.

Answer 16

Compound gauge

Question 17

an instrument used to measure voltage, resistance and dc currents

Answer 17

Multi-tester

Question 18

and instrument used to measure ac current. Usually used in diagnosing and monitoring the current of refs and air-con during troubleshooting operation.

Answer 18

Clamp meter

Question 19

an instrument used to detect areas or parts of the tube system where refrigerant is leaking

Answer 19

Leak detector

Question 20

Compressor is what kind of machine?

Answer 20

Hermetic and reciprocating machine

Question 21

The heart of the system. Compress the refrigerant into a superheated gas and pumps it to circulate in the entire tube system

Answer 21

Compressor

Question 22

Cools down the superheated gas through conduction

Answer 22

Condenser

Question 23

cooling medium

Answer 23

water, brine or another refrigerant

Question 24

What are the refrigeration flow control

Answer 24

expansion valve, capillary tube or throttling device

Question 25

The part that reduced the high pressure of the hot liquid refrigerant and at the same time reduces its temperature

Answer 25

Refrigeration flow control

Question 26

What part of a refrigeration system refrigeration takes place?

Answer 26

Evaporator