Page 346 - Understanding Automotive Electronics

2735 | CH 9 Page 333 Tuesday, March 10, 1998 1:24 PM

AUTOMOTIVE INSTRUMENTATION 9

10. What sensor input variables are used 15. In electronic instrumentation, fuel
in a typical trip computer system? quantity is displayed by
a. manifold pressure and engine a. an ammeter
speed b. a potentiometer
b. RPM, barometric pressure, c. a digital display
and fuel quantity remaining d. none of the above
c. MPG and fuel consumption 16. LED refers to
d. car speed, fuel flow rate, fuel a. level-equalizing detector
quantity remaining in tank
b. light-emitting diode
11. A CRT display device uses c. liquid crystal display
a. a cathode ray tube scanned in d. none of the above
a raster pattern 17. An LCD display uses
b. a vacuum-fluorescent tube a. a nematic liquid
c. an incandescent light source b. an incandescent lamp
d. none of the above
c. large electrical power
12. In the digital video signal d. a picket fence
generator used with a CRT display
18. Light is produced in a VFD by
a. each bit in the shift register a. ionic bombardment of a
corresponds to a pixel location
filament
b. each pixel on the screen b. ambient temperature
corresponds to a specific video c. bombardment of a phosphor
voltage level by energetic electrons
c. scanning of the CRT by the
d. chemical action
electron beam is from right to
left and from bottom to top 19. Fuel economy is calculated in a
d. all of the above are true trip computer by:
a. S × F
13. The term MUX refers to
b. F/S
a. an electronic switch that c. S/F
selects one of a set of inputs d. none of the above
per an input code
b. a digital output device
c. a time slot
d. none of the above
14. A D/A converter
a. is a disk access device
b. converts the digital output of
an instrumentation computer
to analog form
c. stores analog data
d. enters digital data in a
computer

UNDERSTANDING AUTOMOTIVE ELECTRONICS 333