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CPL Test Series
Question Bank
Questions for ICE ACCRETION
Answer the following questions
Test Mode
Training Mode
1. Carburetor icing occurs when air from intake passes through a ventury (choke) and causes expansional cooling and vaporization of fuel. Serious icing can occur can occur at extreme temperatures
13°C
30°C to - 10°C
20°C
2. Liquid water content is an important factor in icing. As the maximum water concentration is around ______ , maximum ice formation in clouds may also be expected around the level
-15°C level
-20°C level
-25°C level
3. Icing ____ the stalling speed appreciably
Does not increase/decrease
Decreases
Increases
4. Rime is formed by freezing of ____ supercooled water droplets on airframe when air is flying through clouds
Medium
Small
Large
5. In TCU icing may range from light to severe type at least up to _____ level
-40°C level
-20°C level
30°C level
6. CI, CS and CC clouds consist mostly ice crystals, Icing hazard is therefore
Maximum
Negligible
Medium
7. ______ occurs in a moist cloudless air on an aircraft surface having temp, below 0°C, due to sublimation of water vapour onto feathery ice crystals
Glazed
Rime
Hoar Frost
8. _____ occurs in St, Sc, Ac, Au, Cu, Ns at temperature -10 to -40°C and in Cb at temperature 20 to -40°C
Rime
Glazed
Hoar Frost
9. The _____ ice poses serious aviation hazard
Glazed
Hoar Frost
Rime
10. When fog freezes on parked aircraft it produces
Clear ice
Rime
Hoar Frost
11. Airframe icing occurs below 0°C. Its probability of occurrence decreases progressively to -20°C, as at lower temperatures the proportion of super-cooled water drops in a cloud
Does not change
Decreases
Increases
12. Glazed ice is formed by freezing of _____ supercooled water droplets on airframe and aircraft is flying through clouds
Medium
Small
Large
13. _____ occurs in AS, NS, AC and towering CU or CB between 0°C and -20°C, in warm front below 0°C, especially if the aircraft has rapidly descended from a colder region
Glazed
Mixture of Rime and Clear ice
Rime
14. In AC clouds _____ icing is possible in mountainous areas
Moderate
Light
Severe
15. In clouds _____ occurs when a wide range of water drop sizes are present at temperatures between 0°C and -40°C
Glazed
Mixture of rime and clear ice
Rime
16. In CB icing may range from light to severe type up to -20°C level. Below this temperature severe icing is
maximum
not significant
significant
17. Opaque Rime ice is
Light porous
Solid
Mixture of porous and solid
18. In clouds at temperatures below 0°C and aircraft may encounter icing of the type
only Glazed
only Rime
intermediate between those
19. AS, NS consist of supercooled water drops and ice crystals in varying proportion icing is possible
Maximum
Negligible
Light or moderate
20. Hoar frost occurs on airframe in clear air when the temperature of air frame is
frost point
below the frost point
just above the frost point
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