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4673539
Unit 35 - Quiz
Description
Unit 35 Comfort and Psychrometrics
Quiz by
Neil Revollo
, updated more than 1 year ago
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Created by
Neil Revollo
over 8 years ago
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Resource summary
Question 1
Question
What is the relative humidity if the dry-bulb temperature is 100ºF and the wet-bulb temperature is 65ºF?
Answer
13%
33%
43%
63%
Question 2
Question
The wet-bulb depression is __________.
Answer
the difference between the dry-bulb and wet-bulb temperatures.
the same as the wet-bulb temperatures.
the same as the dry-bulb temperatures.
when the air is saturated with moisture.
Question 3
Question
Comfort can be described as the gentle balance between __________.
Answer
air cleanliness, air movement, temperature, and humidity.
air velocity, air cleanliness, humidity, and air movement.
air speed, air velocity, temperature, and humidity.
acceleration, air cleanliness, filtration, and humidity.
Question 4
Question
Infiltration is the term used when referring to the air entering a structure _________.
Answer
through an air make-up unit
around doors and windows
through ventilation
because of street traffic
Question 5
Question
A fresh air intake is necessary to keep the indoor air from becoming _________.
Answer
too humid
superheated
oxygen starved and stagnant
too dry
Question 6
Question
The dry-bulb temperature is the __________.
Answer
same as the wet-bulb temperature
total of the sensible and latent heat
sensible heat level of the air
sensible heat less the humidity
Question 7
Question
If the dry-bulb temperature is 93ºF and the wet-bulb temperature is 60ºF, what is the specific volume of the air?
Answer
14.0 ft^3/lb
14.0 lb/ft^3
10 lb/ft^3
10 ft^3/lb
Question 8
Question
The human body is comfortable when the heat produced in the body is equal to the heat lost to the surroundings.
Answer
True
False
Question 9
Question
The rate at which water will evaporate from the wick on the wet-bulb thermometer is determined by the moisture content of the surrounding air.
Answer
True
False
Question 10
Question
Introduction of forced ventilation in the winter heating season helps to raise the humidity level.
Answer
True
False
Question 11
Question
When the dry-bulb and wet-bulb temperatures are the same, the relative humidity of the air is [blank_start]100%[blank_end].
Answer
100%
Question 12
Question
Air consists of approximately [blank_start]21%[blank_end] of oxygen.
Answer
21%
Question 13
Question
[blank_start]7,000[blank_end] grains of moisture equals one pound of water.
Answer
7,000
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