EBK AUTOMOTIVE TECHNOLOGY: A SYSTEMS AP
6th Edition
ISBN: 8220100474392
Author: ERJAVEC
Publisher: Cengage Learning US
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Textbook Question
Chapter 16, Problem 7ASRQ
Technician A uses a testlight to detect resistance. Technician B uses a jumper wire to test circuit breakers, relays, and lights. Who is correct?
- Technician A
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20
3.
2-233
2520
Тр
Gears
1079
A pair of helical gears consist of a 20 teeth pinion meshing with a 100 teeth gear. The pinion rotates at
Ta
720 r.p.m. The normal pressure angle is 20° while the helix angle is 25°. The face width is 40 mm and
the normal module is 4 mm. The pinion as well as gear are made of steel having ultimate strength of
600 MPa and heat treated to a surface hardness of 300 B.H.N. The service factor and factor of safety
are 1.5 and 2 respectively. Assume that the velocity factor accounts for the dynamic load and calculate
the power transmitting capacity of the gears.
[Ans. 8.6 kW
4. A single stage helical gear reducer is to receive power from a 1440 r.p.m., 25 kW induction motor. The
gear tooth profile is involute full depth with 20° normal pressure angle. The helix angle is 23°,
number of teeth on pinion is 20 and the gear ratio is 3. Both the gears are made of steel with allowable
beam stress of 90 MPa and hardness 250 B.H.N.
(a) Design the gears for 20% overload carrying capacity from standpoint of bending strength and
wear,
(b) If the incremental dynamic load of 8 kN is estimated in tangential plane, what will be the safe
power transmitted by the pair at the same speed?
Determine the stress in each section of the bar shown in Fig. when subjected to an
axial tensile load shown in Fig. The central section is 30 mm hollow square cross-
section; the other portions are of circular section, their diameters being indicated
What will be the total deformation of the bar? For the bar material E = 210GPa.
20mi
О
30mm
30mmm
2.6
15mm
30kN
1
2
10kN
- 20kN
3
-329 91mm
100mm
371mm
Chapter 16 Solutions
EBK AUTOMOTIVE TECHNOLOGY: A SYSTEMS AP
Ch. 16 - How will an electrical circuit behave if there is...Ch. 16 - What happens to an electrical circuit when there...Ch. 16 - Prob. 3RQCh. 16 - Prob. 4RQCh. 16 - Wiring harnesses are typically shielded by plastic...Ch. 16 - True or False? The MIN/MAX function on some DMMs...Ch. 16 - True or False? A zero reading on an ohmmeter means...Ch. 16 - Prob. 8RQCh. 16 - What type of solder should be used to repair...Ch. 16 - Which of the following lab scope controls must be...
Ch. 16 - Prob. 11RQCh. 16 - Prob. 12RQCh. 16 - Prob. 13RQCh. 16 - Which of the following information is not given in...Ch. 16 - While troubleshooting a problem, the key to...Ch. 16 - While discussing electricity: Technician A says...Ch. 16 - While discussing NTC thermistors: Technician A...Ch. 16 - While measuring the resistance of a wire with an...Ch. 16 - While testing variable resistors: Technician A...Ch. 16 - Prob. 5ASRQCh. 16 - Technician A uses a testlight to test circuit...Ch. 16 - Technician A uses a testlight to detect...Ch. 16 - While diagnosing the location of a wire-to-wire...Ch. 16 - While measuring resistance: Technician A uses an...Ch. 16 - While discussing how to test a switch: Technician...
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