Relative humidity is measured using:
A) Temperature and barometric pressure readings.
B) Wet-bulb and dry-bulb temperature readings.
C) Comparative volume measurements.
D) A particle counter to count the grains of moisture in an air sample.
[Ques. 2] Where do you measure the supply air temperature when checking furnace temperature rise?
A) Preferably in a duct after the air has left the supply plenum
B) In a small hole drilled in the vent
C) At the supply registers in the house
D) As close to the furnace outlet as possible
[Ques. 3] What types of systems are particularly well suited to split system design?
A) Small systems for hotel rooms
B) Large chillers
C) Systems with water-cooled condensers
D) Residential air-conditioning systems with air-cooled condensers
[Ques. 4] Select the possible causes of an overfeeding TEV. You may select more than one.
A) Oversized TEV
B) High superheat adjustment
C) Restricted filter drier
D) Restricted inlet screen on TEV
E) TEV sensing bulb not making good thermal contact
F) Dead thermostatic bulb charge
G) Undersized valve
H) Low superheat adjustment
[Ques. 5] A unique feature of multizone and double-duct systems is that they:
A) Will fit in tight spaces.
B) Can deliver conditioned air to different zones.
C) Can heat and cool at the same time using a single air handler.
D) Operate more efficiently than most other systems.
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