Intro To Refrigeration

Question 0

Kelvin (k)

Answer 0

Is zero point of scale =-273.16

Absolute zero

Question 1

Temperature is

Answer 1

The degree of hotness or coldness sometimes called the quality of heat

Measure of energy of vibration of molecules

Question 2

Absolute zero is

Answer 2

Kelvin -273.16c

Question 3

Absolute temp equation

Answer 3

K=celcius+273

Question 4

Standard unit for pressure is

Answer 4

Pascal (Pa)

Pounds per square inch

Question 5

Pressure conversion

Answer 5

kPa=psi x 6.895

Or
Psi = kPa/6.895

Question 6

Absolute pressure

Answer 6

Pressure gauge reads pressure above atmospheric pressure. Atmospheric pressure reads 0kPa but there is atmospheric pressure of 101.325kPa
Gauge pressure kPa + 101.325kPa = absolute kPa

Question 7

Triangle

Answer 7

Sum of 3 angles is 180 deg

Area=b x h/2

Question 8

Volume of a tank

Answer 8

Area=b x h

Volume = b x h x L

Question 9

Circles

Answer 9

Area = x r2

Question 10

1m cubed

Answer 10

1000L

Question 11

Joule

Answer 11

Is the unit of all forms of energy

Heat, mechanical, potential, electrical, nuclear, stress

Question 12

Specific heat of water

Answer 12

It requires 4.18kj of heat energy to raise the temp of 1kg of water by 1degree celcius

Question 13

Latent heat of fusion

Answer 13

Ice at 0degress celcius requires 335kj of energy to melt 1kg of ice

Question 14

Watt

Answer 14

Power unit of electrical power such that 1 watt=1joule per second

Question 15

B.T.U

Answer 15

Brith is thermal unit

Amok d of heat energy required to raise 1lb of water 1 degree 1F