MODULE 3 CHAPTER 5 QUIZ 5

Question Number. 41. A ni-cad battery found to be below normal capacity should. 
Option A. have its electrolyte adjusted.
 Option B. be removed and used for ground use only. 
Option C. be re-charged with a freshening charge. 
Correct Answer is. be re-charged with a freshening charge. 
Explanation. See Jeppesen's Aircraft Batteries .................................. 

Question Number. 42. In cold weather, to prevent the electrolyte freezing, a battery must be kept. Option A. fully charged. Option B. does not matter. Option C. fully discharged.
Correct Answer is. fully charged. Explanation. Checkout www.amplepower.com/primer/winter/ .................................. 

Question Number. 43. The internal resistance of a battery off load compared to on load is.
Option A. the same.
 Option B. increased.
Option C. decreased.
Correct Answer is. the same.
Explanation. Internal resistance is constant, regardless of load .................................. 

Question Number. 44. Two 12V, 40Ah cells in series gives. Option A. 24V 80Ah. Option B. 12V 40Ah. Option C. 24V 40Ah. Correct Answer is. 24V 40Ah. Explanation. Cells in series, voltage doubles, Amp hour rating remains the same ................................. 

.Question Number. 45. A 24V 40AH battery discharges at 200mA. How long will it last?. Option A. 400 hours. Option B. 300 hours. ... Option C. 200 hours. Correct Answer is. 200 hours. Explanation. 200mA goes into 1A-5 times. 5 * 40 = 200 hours .................................. 

Question Number. 46. The electrolyte level of a ni-cad battery. Option A. falls during charge. Option B. falls during discharge. Option C. rises during discharge. Correct Answer is. falls during discharge. Explanation. The electrolyte level of a nicad battery falls during discharge (but the s.g. remains constant) .................................. 

Question Number. 47. When light energises a component, what is the component?. Option A. Light emitting diode. Option B. Photodiode. Option C. Laser diode. Correct Answer is. Photodiode. Explanation. NIL ..................................Question Number. 48. Formation of white crystals of potassium carbonate on a properly serviced Ni-cd battery indicates. Option A. over charged. Option B. full charged. Option C. under charged. Correct Answer is. over charged. Explanation. NIL .................................. 

Question Number. 49. Thermal runaway causes. Option A. violent gassing only. Option B. violent gassing, boiling of electrolyte and melting of plates and casing. Option C. no gassing, but boiling of electrolyte and melting of plates and casing. Correct Answer is. violent gassing, boiling of electrolyte and melting of plates and casing. Explanation. NIL .................................. 

Question Number. 50. A primary cell. Option A. can not recharged. Option B. can be recharged but only a few times. Option C. can be recharged. Correct Answer is. can not recharged. Explanation. NIL. ...