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RFABC ice facility operator > Math and constants > Flashcards

Math and constants Flashcards

1
Q

Mega equals

A

1,000,000

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2
Q

Kilo equals

A

1000

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3
Q

Giga equals

A

1,000,000,000

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4
Q

1 cm = how many mm

A

10mm

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5
Q

100 cm = how many m

A

1m

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6
Q

1 kg of pure water = how many litres

A

1l

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7
Q

1 m cubed = how many litres

A

1000 litres

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8
Q

1 tonne of refrigeration how many kj/min

A

233 kj/min

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9
Q

What is atmospheric pressure at sea level

A

101.325 kPa or 14.696 psi

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10
Q

1 kg = how many grams

A

1000 g

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11
Q

1 tonne = how many kg

A

1000kg

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12
Q

1 kg = how many Newtons (force)

A

9.81 Newtons

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13
Q

1 lbs = how many kg

A

0.454 kg

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14
Q

What does BEDMAS acronym stand for

A

Algebra order of operations. Brackets, Exponents, Division, Multiplication, Addition, Subtraction.

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15
Q

In ohms law equation, what represents Watts, Volts, Amps, ohms?

A

Watts = P power
Volts = E electromotive force
Amps = I intensity
Ohms = R resistance

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16
Q

3 basic electricity calculations

A

E= IR
P= EI
P= I-squared *R

17
Q

How many kj/kg is the latent heat of fusion (water)

A

335 kj/kg

18
Q

How many kj/kg is the latent heat of evaporation (water)

A

2257 kj/kg

19
Q

How many kj/min is a tonne of refrigeration

A

233 kj/min

20
Q

What is the specific heat of water

A

4.18 kj/kg/degrees C or 4.18 kj/kg/K

21
Q

What is conversion equation for C to F

A

C = (F-32) *5/9

22
Q

What is conversion equation for F to C

A

F = (C*9/5)+32

23
Q

What is conversion equation for Celsius to Kelvin (absolute temperature)

A

K= C + 273

24
Q

What is equations for converting psi and kPa

A

kPa = psi * 6.895
psi = kPa/6.895

25
Q

How to get absolute pressure

A

Gauge pressure + atmospheric pressure (101.325 sea level)

26
Q

Equation for area of square

A

Base * height

27
Q
A

RFABC ice facility operator (5 decks)

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