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Sample Practice Test Questions
Which of the following does not filter air as part of the respiratory system?
epiglottis
After air enters through the nose, it passes through the nasal cavity which filters, moistens, and warms it. Further filtering takes place in the pharynx, which also helps protect against infection, and then in the trachea which is just past the epiglottis which prevents food from entering the airway.
Poor balance could indicate an issue with which part of the nervous system?
cerebellum
The cerebellum is a large cluster of nerves at the base of the brain that's responsible for balance, movement, and muscle coordination.
Opposed cylinder designs feature two rows of cylinders that are placed at what angle to each other?
180°
Opposed cylinder designs place cylinders flat in two rows 180° opposite each other with a single crankshaft running between them.
Saturated fats can __________ LDL ("bad") cholesterol while unsaturated fats can __________ it.
raise, decrease
Saturated fats can raise LDL ("bad") cholesterol while unsaturated fats can decrease it.
Which of the following is not a type of bridge?
block
The six basic bridge forms are beam, truss, arch, cantilever, cable, and suspension.
Capacitors store:
electricity
Capacitors store electricity and are used in circuits as temporary batteries. Capacitors are charged by DC current (AC current passes through a capacitor) and that stored charge can later be dissipated into the circuit as needed. Capacitors are often used to maintain power within a system when it is disconnected from its primary power source or to smooth out or filter voltage within a circuit.
The farad is a unit of measurement for:
capacitance
Capacitors store electricity and are used in circuits as temporary batteries. Capacitors are charged by DC current (AC current passes through a capacitor) and that stored charge can later be dissipated into the circuit as needed. Capacitors are often used to maintain power within a system when it is disconnected from its primary power source or to smooth out or filter voltage within a circuit.
Convert -20C° to F°.
-4
To convert from C° to F° use:
\(F° = {9 \over 5}C° + 32\)
\(F° = {9 \over 5}(-20) + 32\)
\(F° = {-180 \over 5} + 32\)
\(F° = -36 + 32 = -4\)