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Exam Number: 089020RR
Lesson Name: Small Engine Electrical Systems

1 of 20 : Select the best answer for the question.1. When you first fill a new battery with electrolyte, the battery has approximately what percentage of a full charge?
A. 100
B. 50
C. 75
D. 25

2 of 20 : Select the best answer for the question.2. The negative ions in the electrolyte solution of a battery are attracted to the
A. negative plates.
B. sediment chambers.
C. positive plates.
D. separators.

3 of 20 : Select the best answer for the question.3. The battery on a 25 A charging system keeps going dead. The engine is operated at 3,600 rpm. According to the troubleshooting guide referred to in this study unit, the voltage measured at the stator’s output leads should be at least
A. 28 VAC.
B. 16 VAC.
C. 8 VAC.
D. 12 VAC.
4 of 20 : Select the best answer for the question.4. What’s the perfect operating temperature for a lead-acid battery?
A. 40°F (4.4°C)
B. 89°F (31.7°C)
C. 13°F (–10.6°C)
D. 77°F (25°C)

5 of 20 : Select the best answer for the question.5. The type of charger used with nicad cells is the
A. trickle charger.
B. thermal charger.
C. flash charger.
D. memory charger.

6 of 20 : Select the best answer for the question.6. The R terminal of an ignition switch is usually connected to the
A. ground.
B. accessories.
C. starter.
D. rectifier-regulator.

7 of 20 : Select the best answer for the question.7. A battery can be light-load tested by
A. turning on the headlight and measuring the voltage across the battery with the engine off.
B. starting the engine 10 times and then measuring battery voltage with the engine off.
C. using a hydrometer to measure the specific gravity of the electrolyte after the engine is started.
D. placing a special test instrument across the battery for five seconds and then measuring the battery voltage after 14 sec.

8 of 20 : Select the best answer for the question.8. What type of acid solution is used for the electrolyte of a lead-acid battery?
A. Sulfuric acid
B. Hydrochloric acid
C. Hydrofluoric acid
D. Nitric acid

9 of 20 : Select the best answer for the question.9. With a solenoid-shift starter, the solenoid’s plunger is used to move the drive lever to engage the drive pinion with the flywheel’s gear. What else does the solenoid do?
A. It opens the kill terminal to the electronic ignition module.
B. It applies power to the starter’s windings.
C. It applies power to the accessory circuits.
D. It compresses the anti-drift spring.

10 of 20 : Select the best answer for the question.10. If the electrolyte level decreases in a standard lead-acid battery, what should be added to fill the battery?
A. Tap water
B. Distilled water
C. New electrolyte
D. Mineral water

11 of 20 : Select the best answer for the question.11. A battery is rated for 25 Ah (ampere-hours). Which one of the following statements concering this battery is False?
A. The battery can produce 25 A of current for 1 hr.
B. If the battery produces 1 A for 25 hr, the battery will be totally discharged.
C. If the battery produces 25 A of current for 1 hr, there will still be a large cold-cranking amp capacity.
D. The battery can produce 1 A of current for 25 hr.

12 of 20 : Select the best answer for the question.12. The brushes of an alternator ride on
A. plastic separators.
B. mica mounts.
C. a commutator.
D. slip rings.
13 of 20 : Select the best answer for the question.13. The 15 A charging system in this study unit uses how many magnets mounted on the flywheel?
A. Eight
B. Two
C. Six
D. Four
14 of 20 : Select the best answer for the question.14. The most common mechanical problem with a Bendix-type starter is
A. drive pinion binding on splines.
B. broken teeth on the drive pinion.
C. worn end cap bushings.
D. broken anti-drift spring.
15 of 20 : Select the best answer for the question.15. The purpose of the cutout relay in a voltage regulator for a generator is to
A. disconnect the generator from the charging system when the engine is at high rpm.
B. disconnect the generator from the battery if the generator is turning too slowly.
C. stop the engine if the generator is spinning too fast.
D. open and close its contacts depending upon whether a positive or negative cycle of voltage is being produced.
16 of 20 : Select the best answer for the question.16. Besides the lead-acid battery, another type of battery commonly used in small-engine starting systems is the
A. nickel-cadmium battery.
B. silver-zinc battery.
C. lithium battery.
D. zinc-air battery.

17 of 20 : Select the best answer for the question.17. What is the specific gravity of fresh, clean electrolyte?
A. 1.0225
B. 1.0000
C. 1.265
D. 1.835

18 of 20 : Select the best answer for the question.18. How many stator poles are used for battery charging when using the 3 A stator assembly given as an example in Figure 12 in this study unit?
A. Four
B. One
C. Three
D. Two

19 of 20 : Select the best answer for the question.19. The rectifier used for most larger alternator systems is
A. a zener diode rectifier with a basic diode regulator.
B. a half-wave diode rectifier.
C. a full-wave bridge rectifier.
D. an SCR-based rectifier-regulator assembly

20 of 20 : Select the best answer for the question.20. Which of the following is a suggested cleaning tool for the contacts of a solenoid?
A. Baking soda
B. Bead blaster
C. Jeweler’s cloth
D. A file