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RFABC ice facility operator > Test yourself > Flashcards

Test yourself Flashcards

1
Q

Convert 220C to fahrenheit

A

428 F

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2
Q

Convert 400F to celcius

A

204C

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3
Q

What is the area of a circle that is 55 m in diameter

A

2375.8 meters squared

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4
Q

What is the volume in cubic meters of a cylindrical tank with flat ends that is 1.5 meters in diameter and 3.2 meters in length

A

5.654 meter cubed

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5
Q

What is the volume in litres of a rectangle tank that is 1.3 meter by 1.8 meter and is 5.2 meters long

A

12,168 litres

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6
Q

A triangle is 90 right triangle. The two sides adjoining the right angle are 33 cm and 44 cm. What is the length of the third side?

A

55 cm

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7
Q

What is the area of a right angle triangle with sides 5,7 and 8.602m

A

17.5 meter squared

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8
Q

What is the unit of all forms of energy?

A

Joule

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9
Q

A pressure gauge reads 100 kPa. What is the absolute pressure (total)?

A

201.3 KPa

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10
Q

How many kj/kg of energy must be removed to freeze liquid water at 0C into ice at 0C?

A

335 kj/kg

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11
Q

What is the weight of 1 litre of pure water?

A

1kg

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12
Q

What is temp of of absolute zero on Celsius scale

A

-273 C

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13
Q

What is a BTU

A

Heat energy required to raise 1lb of water 1F

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14
Q

What is the specific heat of water in kj/kg K

A

4.18 kj//kg K

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15
Q

What would 1 tonne of water weigh in kg

A

1000 kg

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16
Q

A 120 v circuit draws 16 amps what is the power consumption in watts

A

1920 w (1.92 kw)

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17
Q

What current will flow through a 25 w bulb at 12 v

A

2.08 amps

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18
Q

What is the power in watts of a 11 amp supply to a 3 ohm resistance

A

363w

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19
Q

How much would it cost to use 5 kw for 5 hours at 5.08 cents per kw hour

A

$2.00

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20
Q

An arena has 120 lights which are 300 watts each. If electricity costs 5.08/kw hour, what is the cost to run the lights per hour.

A

$2.88 per hour

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21
Q

What is the cost per day to run the lights

A

$69.12 per day

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22
Q

What is another term used when referring to watts

A

Power

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23
Q

What is the resistance of an electric heater that draws 14 amps at 240 volts

A

17.14 ohms

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24
Q

In a series circuit of 3 equal resistances, supplied by a 9 volt battery that uses a flow of .03 amps, what is the ohm of each resistance

A

100 ohms

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25
Q

What class of fire extinguisher would you require for an electrical fire

A

Class C

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26
Q

What class of fire extinguisher would you require for a wood fire

A

Class A

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27
Q

What class of fire extinguisher would you require for a plastics fire

A

Class B

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28
Q

What class of fire extinguisher would you require for a burning metal fire

A

Class D

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29
Q

What type of refrigerant can you detect with dye and ultraviolet lights

A

Freon

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30
Q

What is the most important thing to do in the event of a fire

A

Sound the alarm

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31
Q

Where is the emergency stop and ammonia release valve for a refrigerant plant

A

Outside the building

32
Q

What colour is the fire box painted

A

Red

33
Q

What is the minimum interval that refrigerant detectors must be calibrated

A

Annually

34
Q

What is the most common cause of accidents

A

Human error

35
Q

What does WHMIS stand for

A

Workplace hazardous material information system

36
Q

What does SDS stand for

A

Safety data sheet

37
Q

Do ammonia cylinders stored in your refrigerant plant require labels

A

Yes

38
Q

When must the WHMIS program be reviewed

A

Annually

39
Q

Who administers WHMIS legislation

A

Worksafe BC

40
Q

Who is responsible for providing labels on controlled products

A

The supplier

41
Q

Who is responsible for training workers to understand SDS sheets

A

The employer

42
Q

Who is responsible to make sure products are identified

A

The employer

43
Q

How many WHMIS hazard classes are there

A

10

44
Q

Is it Federal or Provincial Government that legislates WHMIS

A

Both; Federal (supply), Provincial (use)

45
Q

Do SDS’s expire? If so, when?

A

No but they must be current

46
Q

Can you use a controlled product if it does not have a SDS?

A

No

47
Q

In the event of eye contact with ammonia what should you do

A

Flush eyes with large quantities of water

48
Q

What should you do after severe inhalation of ammonia fumes

A

Obtain immediate medical attention. Follow SDS section Inhalation

49
Q

Is ammonia combustible

A

Yes but with difficulty

50
Q

What are the flammability limits of ammonia

A

16% - 25%

51
Q

What is the ph of a 10% solution of ammonia

A

12

52
Q

Is ammonia alkaline or acidic

A

Alkaline

53
Q

What is the boiling point of liquid ammonia at atmospheric pressure

A

-33.35C

54
Q

If a 15ft cubed pressure vessel has a pressure relief valve set at 1725 kPa, then the pressure relief valves must not let the pressure in the vessel rise more than ___ above the setting of the pressure release valve
A - 90%. B - 172.5 kPa.
C - 10 psi. D- 0 kPa
E - 1725 kPa

A

B 10% higher than 1725 kPa setting.

55
Q

In order to substitute a refrigerant with a different kind of refrigerant, which of the following is true?
A- compliance with the latest edition CSA B52
B- permission of the manufacturer
C- permission of the contractor
D- compliance with the original code of construction

A

A

56
Q

What is the minimum design pressure for an R717 air cooled compression refrigeration system
A- 2016 kPa
B- 138 kPa
C- 293 kPa
D- 951 kPa
E- none of these

A

A

57
Q

What is the required relief valve capacity for an evaporator which is 2.5 m in diameter and 4m overall length (assume NH3 is refrigerant)
A- 5 kg per minute
B- 24 lbs air per minute
C- 5 lbs air per minute
D- 25 kg air per minute

A

D

58
Q

If the location of refrigerant piping is installed between floors that are not adjacent, which is true
A- the piping shall be contained in an approved rigid, fire resisting pipe
B- the piping shall be non-ferrous larger than 28.6 mm
C- that piping must be located in an air shaft
D- that piping must cross a stairway or lobbies
E- none of these

A

A

59
Q

Carbon dioxide CO2 is
A- a group A1 refrigerant
B- not grouped
C- not a refrigerant
D- toxic when contained
E- banned for use

A

A

60
Q

A change of state with no change in temperature is caused by ____
Latent heat, sensible heat, conduction, or convection

A

Latent heat

61
Q

A flourocarbon or halocarbon is ____.
a secondary coolant, a Freon, a halogen, or none of these

A

A Freon

62
Q

Is ammonia refrigerant cheaper or more expensive than R22?

A

Cheaper

63
Q

Does heat travel FROM the brine or TO the brine in the ice rink floor?

A

To the brine

64
Q

Is R-290 (propane)more or less flammable than R-22?

A

More flammable

65
Q

Is refrigerant R-717 more or less toxic than R134a?

A

More

66
Q

The boiling point of water at atmospheric pressure is _____

A

100C

67
Q

The boiling point of ammonia at atmospheric pressure is _____.

A

-33C

68
Q

The separation between the primary and secondary refrigerants is ____.
the chiller, the compressor, the evaporator, the TXV

A

The chiller

69
Q

The brine usually used for ice rink cooling floors is ____.
Sodium, calcium chloride, glycol

A

Calcium chloride

70
Q

The brine should be kept at about pH ____.

A

7.5 to 8.5

71
Q

The main problem with steel brine piping is ____.

A

Rust on outside, corrosion and fouled nipples

72
Q

What liquid flows through the headers in an indirect system?

A

Secondary coolant (calcium chloride, glycol)

73
Q

Waste heat produced by the refrigeration system can be used for ____

A

Heating floor, Zamboni, snow melt

74
Q

The freeze point of calcium chloride is usually kept between ___C and ___C

A

-20 -23

75
Q

The two types of arena floors are the cooling floor and the ________

A

Heating floor

76
Q
A

RFABC ice facility operator (5 decks)

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