Electrical And Environmental Volume 5 2A656

68 Questions | By Gdobby | Last updated: Mar 20, 2022 | Total Attempts: 423

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Feb 2011 cdcs

Questions and Answers

1.

(801) A gaseous nitrogen (N2) charge is added to a liquid fire extinguishing agent in order to
- A.
  
  Convert the liquid to a gas upon discharge.
- B.
  
  Expel the agent from the bottle.
- C.
  
  Assist in extinguishing the fire.
- D.
  
  Stabilize the temperature.
2.

(801) In a liquid-agent fire extinguisher container, why is the frangible disc undercut into pie shaped sections?
- A.
  
  To break easily.
- B.
  
  To break cleanly into large pieces.
- C.
  
  To stop the pieces from clogging the strainer.
- D.
  
  To enable the pieces to pass easily through the strainer.
3.

(802) The purpose of a time delay relay that is used on some liquid-agent fire extinguishing systems is to
- A.
  
  Position the valves.
- B.
  
  Select the fire bottle bank.
- C.
  
  Prime the explosive cartridge.
- D.
  
  Prevent discharging of the agent.
4.

(802) BANK no. 2 in a two-shot liquid-agent fire extinguishing system failed to discharge, while BANK no. 1 discharged normally. The most probable cause of this malfunction is what type of faulty switch?
- A.
  
  Engine selector.
- B.
  
  Agent discharge.
- C.
  
  Time delay relay.
- D.
  
  Discharge selector.
5.

(802) A flashing red light on the fire emergency control T-handle indicates
- A.
  
  An open fuel valve.
- B.
  
  Closed air valves.
- C.
  
  An overheat condition.
- D.
  
  D. a fire.
6.

(802) When depressed, which switch on a T-handle fire extinguishing system completes the circuit to the squib?
- A.
  
  Time delay relay switch.
- B.
  
  Agent discharge switch.
- C.
  
  Engine selector switch.
- D.
  
  Bottle selector switch.
7.

7. (802) In the T-handle fire extinguishing system, the two-way check valve is pushed into position by the
- A.
  
  Liquid agent.
- B.
  
  Discharge valve.
- C.
  
  Agent discharge switch.
- D.
  
  Gaseous nitrogen charge.
8.

(803) How does a liquid coolant system keep electronic components cool?
- A.
  
  Cycles coolant through the electronic component.
- B.
  
  Cycles conditioned air through the electronic component.
- C.
  
  Directs coolant across the electronic component.
- D.
  
  Directs conditioned air across the electronic component.
9.

(803) What characteristic of the fluid used in a liquid coolant system makes it suitable as a coolant for electronic components?
- A.
  
  Viscosity.
- B.
  
  Resistance.
- C.
  
  Metallic content.
- D.
  
  Nonconductance.
10.

(803) During initial start of a liquid coolant system, the controller timer energizes the solenoid shutoff valve closed for three minutes. The purpose of this action is to
- A.
  
  Prevent pressure surges.
- B.
  
  Allow for rapid cool down.
- C.
  
  Allow for system stabilization.
- D.
  
  Provide rapid pressure buildup.
11.

(803) What component of a liquid coolant system is positioned by the temperature of the coolant?
- A.
  
  Thermal pilot valve.
- B.
  
  Thermal modulating valve.
- C.
  
  Delta system bypass valve.
- D.
  
  Over-pressure relief valve.
12.

(803) In a liquid coolant system, what tells you that the liquid coolant filter is dirty?
- A.
  
  The system shuts down.
- B.
  
  A warning light flashes.
- C.
  
  A warning horn alarm is activated.
- D.
  
  A mechanical pop-up indicator is activated.
13.

(803) What components control the temperature of the coolant in a liquid coolant system?
- A.
  
  Pump and heat exchanger.
- B.
  
  Pump and thermal pilot valve.
- C.
  
  Thermal modulating valve and heat exchanger.
- D.
  
  Thermal modulating valve and thermal pilot valve.
14.

(804) When maintaining a liquid coolant system, over-torquing clamps may cause what to happen?
- A.
  
  Leakage of the component.
- B.
  
  Contamination of the component.
- C.
  
  Damage or failure of the component.
- D.
  
  Nothing happens.
15.

(804) In a liquid coolant system, what is the purpose of purging the servicing unit supply hose?
- A.
  
  Remove air from the servicing cart.
- B.
  
  Remove contaminants from the system.
- C.
  
  Prevent air from entering the system.
- D.
  
  Prevent moisture from entering the servicing cart.
16.

(805) Why are multiplace liferaft cylinders wire-wound and dip-soldered?
- A.
  
  Decreases metal fatigue.
- B.
  
  Adds strength to the cylinder.
- C.
  
  Decreases cylinder expansion.
- D.
  
  Increases cylinder corrosion resistance.
17.

(805) To ensure that a multiplace liferaft will inflate in extremely low temperatures, the inflation cylinder has a charge of
- A.
  
  Air.
- B.
  
  Nitrogen.
- C.
  
  Hydrogen.
- D.
  
  Carbon dioxide.
18.

(805) What component of a liferaft inflation cylinder assembly keeps carbon dioxide (CO2) within the cylinder and permits an unrestricted flow of CO2 to the liferaft?
- A.
  
  Diffuser plug.
- B.
  
  Seating sleeve.
- C.
  
  Cartridge filter.
- D.
  
  Discharge valve.
19.

(805) Releasing carbon dioxide (CO2) from a liferaft cylinder into a liferaft is normally done by activating the
- A.
  
  Cam.
- B.
  
  Rupture disc.
- C.
  
  Locking sleeve.
- D.
  
  Check valve seat.
20.

(806) How many pounds of carbon dioxide (CO2) does a fully charged shipping/storage cylinder contain?
- A.
  
  25
- B.
  
  50
- C.
  
  75
- D.
  
  100
21.

(806) Liferaft inflation cylinders having an outside diameter of less than 2 inches and a length of less than 2 feet do not require
- A.
  
  Stenciling
- B.
  
  Recharging
- C.
  
  Hydrostatic testing.
- D.
  
  Corrosion treatment.
22.

(807) After recharging a liferaft inflation cylinder—but before returning it to serviceable status—
- A.
  
  Repaint, then reweigh after 24 hours.
- B.
  
  Repaint, then reweigh after 48 hours.
- C.
  
  Test for leaks, then reweigh after 24 hours.
- D.
  
  Test for leaks, then reweigh after 48 hours.
23.

(807) What is added to multiplace liferaft inflation cylinders to ensure proper discharge of the carbon dioxide (CO2)?
- A.
  
  Dry argon.
- B.
  
  Dry nitrogen.
- C.
  
  Liquid argon.
- D.
  
  Liquid nitrogen.
24.

(808) Oxygen in its natural state is
- A.
  
  Colorless, tasteless, and odorless.
- B.
  
  Colorless, tasteless, and weightless.
- C.
  
  Odorless, massless, and volumeless.
- D.
  
  Odorless, massless, and weightless.
25.

(808) Which part of the body usually suffers first from the effects of hypoxia?
- A.
  
  Ears.
- B.
  
  Eyes
- C.
  
  Nose
- D.
  
  Lungs

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