Lesson 12 Flashcards
In construction, compressed air is used to run ? tools.
Select one:
a. hydraulic
b. pneumatic
c. power-driven
d. underground
b. pneumatic
An air ? prevents the tank of an air compressor from over pressurizing.
Select one:
a. filter
b. level indicator
c. pressure valve
d. regulator
d. regulator
Compressing air often creates ? in the air system.
Select one:
a. heat
b. moisture
c. steam
d. vibration
b. moisture
A ? valve is used to drain the water out of an air tank.
Select one:
a. petcock
b. relief
c. stainless steel
d. tee
a. petcock
Aside from corroding an air tank from the inside, moisture does not affect any other operation of the air compressor.
Select one:
True
False
False
The air piping from the air tank connects to the ? valve, which is used to connect the air hoses.
Select one:
a. ball
b. check
c. universal
d. stop
a. ball
Safety concerns that arise from using compressed air equipment include: the noise from the air pressure, the noise from the pneumatic tools, and the ? from an unattached hose under pressure.
Select one:
a. high-pitched blast
b. high-velocity particles
c. hydraulic fluid
d. uncontrollable whipping
d. uncontrollable whipping
An acceptable noise level, as defined by OSHA, in the work area is ? for an eight-hour period.
Select one:
a. 85 dB
b. 105 dB
c. 115 dB
d. 125 dB
a. 85 dB
As the noise level increases by three decibels, the amount of exposure time is cut by ? . Select one: a. 1/4 b. 3/8 c. 1/2 d. 3/4
c. 1/2
A jackhammer typically has a noise level of ? .
Select one:
a. 85 dB
b. 90 dB
c. 100 dB
d. 130 dB
d. 130 dB
Air compressors are not suitable for food, ? , pharmaceutical, or sanitary purposes.
Select one:
a. breathing
b. cleaning
c. confined spaces
d. sandy locations
a. breathing
Generators produce electricity by converting ? energy to ? energy.
Select one:
a. DC / AC
b. fossil fuel / mechanical
c. gasoline / electrical
d. mechanical / electrical
d. mechanical / electrical
If a window is open, it is okay to use a gas-powered electrical generator inside a house when there is a power failure.
Select one:
True
False
False
The main danger of using a generator inside a confined space is ? gas.
Select one:
a. carbon dioxide
b. carbon monoxide
c. methane
d. methylene chloride
b. carbon monoxide
The generator should be placed close to the entrance of the vault the Qualified Electrical Worker is working in, so its operation can be monitored.
Select one:
True
False
False
Never ? a generator in a confined area or while the engine is still hot.
Select one:
a. choke
b. fuel
c. ground
d. start
b. fuel
A GFCI device on a generator opens the circuit due to a(n) ? in the load of the circuit.
Select one:
a. frequency (Hz) change
b. imbalance
c. loss of power
d. neutral to ground contact
b. imbalance
If damage is found on an extension cord, repairing it with two layers of 600-volt vinyl tape is enough to assure a worker’s safety.
Select one:
True
False
False
The size of a generator is determined by how many ? of power it can produce.
Select one:
a. amperes
b. phases
c. potential EMF
d. watts
d. watts
During a football game, the power goes out. To run the listed devices during the outage, a generator that produces ? should be used.
Satellite dish = 35 watts Big screen TV = 300 watts Microwave oven = 2000 watts The furnace = 1200 watts running, 3200 watts startup Select one: a. 3,000 W b. 4,000 W c. 6,000 W d. 10,000 W
c. 6,000 W
During an outage, the city utility crew needs to temporarily supply power to a major intersection that has the following make-up: 24 signal heads with 150-watt lamps, eight pedestrian signal heads with 69-watt lamps, and the cabinet that runs at 960 watts. A generator that can supply ? of power would be needed.
Select one:
a. 4,208 W
b. 5,112 W
c. 7,118 W
d. 8,156 W
b. 5,112 W
If a generator is hooked up to household wiring that is connected to the electrical grid, the utility crew may be in danger of ? .
Select one:
a. back-feed
b. false electrical readings
c. overcurrent
d. unbalanced grounds
a. back-feed
