Quiz

 


TEST YOUR KNOWLEDGE OF "COMFORT" A/C

Q.1

As is passes through the evaporator, refrigerant absorbs heat.

True

False
  

Q.2

The condenser causes water vapour in the air to condense.

True

False
  

Q.3

After a few years of service refrigerant loses its properties, and must be replaced.

True

False
  

Q.4

The evaporating temperature of a refrigerant will depend on the ambient temperature.
True
False
  

Q.5

The condenser of a "cool only" A/C system should be located inside the air-conditioned area.
True
False
  

Q.6

A capillary expansion device is only a length of tubing of small diameter.
True
False
  

Q.7

The pipe-work connecting the 2 units of a split A/C system is never pre-charged with refrigerant.
True
False
  

Q.8

There are always 4-way valves fitted to reversible A/C systems.
True
False
  

Q.9

The heating capacity of a reversible A/C system is slightly less than the electric power it uses.
True
False
  

Q.10

There is always an anti-hammer liquid receiver fitted when rotary compressors are used.
True
False
  

Q.11

An internal unit with "flare" connections is pre-charged with nitrogen during manufacture.
True
False
  

Q.12

There are two lengths of pipe-work connecting the internal unit and the condensing set. The pipe with the larger diameter of the two must always be thermally insulated.
True
False
  

Q.13

When installing an A/C system fitted with service valves, these must be in the front seated position during evacuation.
True
False
  

Q.14

A tube flaring mandrel is used to produce flared fittings.
True
False
  

Q.15

LP faults usually cause frosting of the evaporator.
True
False
  

Q.16

The lower the external temperature, the greater the refrigeration capacity of an A/C system.
True
False
  

Q.17

If there is fouling in an air-cooled condenser, the HP increases.
True
False
  

Q.18

Refrigeration engineer's gauges possess at least one temperature scale.
True
False
  

Q.19

The terminal box of a single phase compressor has three terminals: phase, neutral and earth.
True
False
  

Q.20

A 100 mF / 380V capacitor may safely have a continuous voltage of 220V applied to it.
True
False
  

All these questions were taken from the Refribase Manual (a 266-page manual written exclusively for use by beginners)

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