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United B737 (pitu) > Ice System > Flashcards

Flashcards in Ice System Deck (16)
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1

Icing conditions exist on the ground and for takeoff when the _________, and ______________ or while operating on ramps, taxiways, or runways where snow, standing water, or slush may be ingested by the engines or freeze on the engines, nacelles, or engine sensor probes.
() Outside air temperature 10° C or below ; visible moisture in any form is present (i.e., clouds, fog/mist with visibilitycont of 1 mile or less, rain, snow, sleet, or ice crystals),
() Outside air temperature 10° C or below; visible moisture in any form is present (i.e., clouds, fog/mist with visibility of 3 miles or less, rain, snow, sleet, or ice crystals),
() Outside air temperature 5° C or below; visible moisture in any form is present (i.e., clouds, fog/mist with visibility of 3 miles or less, rain, snow, sleet, or ice crystals),

() Outside air temperature 10° C or below ; visible moisture in any form is present (i.e., clouds, fog/mist with visibility of 1 mile or less, rain, snow, sleet, or ice crystals),

2

Engine ignition must be selected to _____ prior to and during engine anti-ice operation.
() GRD
() CONT
() OFF

cont

3

Probe heat must be ____________.
() ON before engine start
() ON before takeoff
() ON before taxi

() ON before takeoff

4

Temperature controllers maintain window heat on windows ________ at the correct
temperature to ensure maximum strength of the windows in the event of bird
impact.
() L1, R1, L2, and R2
() L1, L3, R1, and R3
() L3, L2, L1, R1, R2, and R3

() L1, R1, L2, and R2

5

On the Window Heat Panel when a green window heat ON light is illuminated, ___________.
() window heat is being applied to selected window(s).
() window heat is being removed from the selected window(s).
() an overheat condition has occurred on the window(s).

() window heat is being applied to selected window(s).

6

Placing the WINDOW HEAT Test Switch to PWR TEST_______________.
() the controller is forced to remove all power, bypassing normal temperature control.
() bypasses all overheat protection
() provides a confidence test.

.() provides a confidence test.

7

Windshield scratching will occur if the windshield wipers are operated on
_____ windshield.
() a wet
() an icy
() a dry

a dry

8

Engine bleed air thermal anti-icing prevents the formation of ice on the
_____.
() spinner
() engine fan blades
() engine cowl lip

() engine cowl lip

9

What occurs when the ENG ANTI-ICE switches are positioned to ON?
() Allows engine bleed air to flow through the cowl anti-ice valve for cowl lip anti-icing, and sets stick shaker logic for icing conditions.
() Adjusts stick shaker and minimum maneuver speed bars on airspeed indications. The airspeed indications return to normal when engine anti-ice is positioned OFF if wing anti-ice has not been used in flight.
() All answers are correct

() All answers are correct

() Allows engine bleed air to flow through the cowl anti-ice valve for cowl lip anti-icing, and sets stick shaker logic for icing conditions.
() Adjusts stick shaker and minimum maneuver speed bars on airspeed indications. The airspeed indications return to normal when engine anti-ice is positioned OFF if wing anti-ice has not been used in flight.

10

On the Engine Anti-Ice Panel, an amber illuminated COWL ANTI-ICE Light indicates __________.
() cowl anti-ice needs to be turned on
() an over temperature condition in duct downstream of engine cowl anti-ice valve
() excessive pressure in the duct leading from the cowl anti-ice valve to the cowl lip

() excessive pressure in the duct leading from the cowl anti-ice valve to the cowl lip

11

An amber TAI on the upper display unit above the N1 gage, indicates __________
() cowl anti-ice valve is in the requested position indicated by related engine anti-ice switch.
() cowl anti-ice valve is not in position indicated by related engine anti-ice switch.
() cowl anti-ice needs to be turned on

() cowl anti-ice valve is not in position indicated by related engine anti-ice switch.

12

On the ground, both of the wing anti-ice valves close if either engine thrust is above the takeoff warning setting or ____________.
() a duct leak condition is sensed
() either temperature sensor senses a duct over temperature
() there is a split in temperature of greater than 20C

() either temperature sensor senses a duct over temperature

13

On the Probe Heat Panel, an amber CAPT PITOT light indicates ________.
() the probe is operating normally
() the probe is not heated
() all answers are correct

() the probe is not heated

14

What supplies conditioned air to No. 1 windows for defogging?
() It is not possible to defog the No. 1 windows
() WINDSHIELD AIR Control knob located on the forward panel
() FOOT AIR Control knob located on the forward panel

() WINDSHIELD AIR Control knob located on the forward panel

15

The cowl anti-ice valve is _____ controlled and ____ actuated.

() pressure; electrically
() electrically; pressure
() electrically; hydraulically

() electrically; pressure

16

Windshield heat must be selected ON _____ before takeoff.

() 10 minutes
() 15 minutes
() 20 minutes

10 minutes