Which of the following describes how an exhaust gas, opacity meter functions?
A. mass particle oscillator
B. smoke color comparitor
C. light extinction measurement
D. exhaust gas chemical analysis
Answer: C
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Indicate whether the statement is true or false
What is the most frequently used type of electric space heater for residential and commercial buildings?
A) Suspended forced air heaters B) Infrared electric heaters C) Convection baseboard electrical heaters D) Cabinet style electric heaters
power steering fluid pressure can be measured with a scan tool
a. true b. false
Answer the following statement(s) true (T) or false (F)
1. In the stop-start pushbutton circuit, when the start button is pushed, current flows through the relay coil and normally closed overload contact to the power source. 2. When a current greater than normal flows through the overload heater, it causes the heater to produce more heat than it does under normal conditions. 3. To prevent a gate from assuming either a high or low condition, gate inputs must always be connected to a definite low. 4. When using TTL logic, inputs are always pulled low with a resistor as opposed to being pulled high. 5. If a resistor is used to pull an input low, it causes the gate to have a voltage drop at its output.