The civil engineer’s 20 scale is often used in mechanical drafting as a , decimal-inch scale.
a. full
b. half
c. quarter
d. double
b. half
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The reproductive system in males produces sperm only in carefully controlled cycles
Indicate whether the statement is true or false
The subsequent problems deal with a measurement system with a frequency response as shown below:
If the system is used to measure a sinusoidal input of frequency 2 rad/sec, the system will exhibit:
A. high attenuation B. high fidelity C. a dc output of amplitude 1 D. low fidelity E. an output of zero amplitude
What is the purpose of the secondary air injection (SAI) System?
A) Pump hydrocarbons out of the tailpipe B) Pump air into the exhaust manifold C) Pump air into the intake manifold D) Convert oxides of nitrogen into water
A water-source heat pump does not require a defrost cycle because
A) it uses buried loops in which water is circulated, and the heat is then extracted from the water. B) there are no check valves or extra metering devices within a water-source heat pump. C) the fluid circulating through the water-source unit cannot be allowed to freeze. D) most water-source units use a single bi-flow thermostatic expansion valve.