unit 2 review(book Flashcards
matter is a substance that occupies space and has
a. color
b. texture
c. temperature
d. mass
d. mass
solid, liquid, and gas are the most common
a. states of matter
b. specific volumes
c. gravitational forces
d. fossil fuels
a. states of matter
in what direction does a solid exert force
a. outward
b. upward
c. downward
d. outward, upward, downward
c. downward
in what direction does a liquid exert force
a. outward
b. upward
c. downward
d. downward and outward
d. downward and outward
vapor exerts pressure in what direction
a. outward
b. upward
c. downward
d. outward, upward, downward
d. outward, upward, downward
the weight per unit volume of a substance is defined as
a. mass
b. density
c. work
d. specific gravity
b. density
the density of a substance compared to the density of water is known as
a. specific gravity
b. specific volume
c. mass
d. weight
a. specific gravity
the volume occupied by 1 pound of a fluid is known as
a. specific gravity
b. specific volume
c. mass
d. weight
b. specific volume
the density of tungsten is 1210 lb/ft3. what would be its specific volume
a. 0.0826 ft3/lb
b. 0.00826 lb/ft3
c. 0.000826 lb/ft3
d. 0.000826 ft3/lb
c. 0.000826 lb/ft3
1/1210
the specific volume of red brass is 0.001865 ft3/lb. what would be its density
a. 53.61 lb/ft3
b. 56.19 lb/ft3
c. 536.19 lb/ft3
d. 536.19 ft3/lb
c. 536.19 lb/ft3
0.001865/1
aluminum has a density of 171 lb/ft3. what would be its specific gravity
a. 2.74
b. 27.4
c. 4.72
d. 47.2
a. 2.74
171/62.4
four pounds of a gas occupy 10ft3. what would be its density and specific gravity
a. 0.4 ft3/lb
b. 0.4 lb/ft3
c. 4.0 lb/ft3
d. 4.0 ft3/lb
b. 0.4 lb/ft3
4/10
whose law states that the volume of a gas varies inversely with the absolute pressure, as long the temperature remains constant
a. charles
b. boyles
c. newtons
d. daltons
b. boyles
at a constant pressure, how does a volume of gas vary with respect to the absolute temperature
a. it will expand when its heated or cooled
b. it will remain constant
c. it will expand when cooled or contract when heated
d. it will expand when heated or contract when cooled
d. it will expand when heated or contract when cooled
whose law states that the total pressure of a confined mixture of gases is the sum of the pressures of each of the gases in the mixture
a. charles
b. boyles
c. newtons
d. daltons
d. daltons
what are the two types of energy most frequently used or considered in the industry
a. solar and fossil fuels
b. nuclear and wind
c. nuclear and solar
d. wind and solar
a. solar and fossil fuels
the time rate of doing work is called
a. weight
b. distance
c. power
d. force
c. power
force x distance is used to determine
a. weight
b. work
c. power
d. volume
b. work
if an air-conditioning compressor weighing 300lb had to be lifted 4ft to be mounted on a base, how much work, in ft-lb, must be done
a. 12,000 lb/ft3
b. 1200 ft3/lb
c. 120 foot-pounds
d. 1200 foot-pounds
b. 1200 ft3/lb
300x4
how many watts of electrical energy are equal to 1hp
a. 1492
b. 746
c. 74.6
d. 373
b. 746
what unit of energy does the power company charge the consumer for
a. kilowatt-hour
b. watt-hour
c. btu/h
d. therm
a. kilowatt-hour
if 3000ft3 of air is crossing an evaporator coil and is cooled from 75F to 55F, what would be the volume of air, in ft3, exiting the evaporator coil
a. 288.7 ft3
b. 28.7 ft3
c. 2887.8 ft3
d. 1392.2 ft3
c. 2887.8 ft3
a gas is compressed inside a compressors cylinder. when the piston is at its bottom dead center, the gas is initially at 10 psig, 65F, and 10.5 in3. After compression and when the piston is at top dead center, the gas is 180F and occupies 1.5in3. what would be the new pressure of the gas in psig
a. 196
b. 19.6
c. 1.96
d. 1960
a. 196
how many btu/h would be produced in a 12kw electric heater
a. 4095 btu/h
b. 40,956 btu/h
c. 400,956 btu/h
d. 495 btu/h
b. 40,956 btu/h
