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CPL Test Series
Question Bank
Questions for ICE ACCRETION
Answer the following questions
Test Mode
Training Mode
1. 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
-25°C level
-20°C level
2. CI, CS and CC clouds consist mostly ice crystals, Icing hazard is therefore
Negligible
Medium
Maximum
3. When fog freezes on parked aircraft it produces
Hoar Frost
Rime
Clear ice
4. Opaque Rime ice is
Light porous
Mixture of porous and solid
Solid
5. In clouds at temperatures below 0°C and aircraft may encounter icing of the type
intermediate between those
only Glazed
only Rime
6. 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
7. 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
8. Hoar frost occurs on airframe in clear air when the temperature of air frame is
below the frost point
just above the frost point
frost point
9. _____ occurs in St, Sc, Ac, Au, Cu, Ns at temperature -10 to -40°C and in Cb at temperature 20 to -40°C
Glazed
Hoar Frost
Rime
10. Glazed ice is formed by freezing of _____ supercooled water droplets on airframe and aircraft is flying through clouds
Small
Large
Medium
11. In TCU icing may range from light to severe type at least up to _____ level
-20°C level
30°C level
-40°C level
12. ______ 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
13. The _____ ice poses serious aviation hazard
Hoar Frost
Rime
Glazed
14. In CB icing may range from light to severe type up to -20°C level. Below this temperature severe icing is
not significant
maximum
significant
15. In AC clouds _____ icing is possible in mountainous areas
Light
Moderate
Severe
16. Icing ____ the stalling speed appreciably
Does not increase/decrease
Decreases
Increases
17. AS, NS consist of supercooled water drops and ice crystals in varying proportion icing is possible
Negligible
Maximum
Light or moderate
18. 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
30°C to - 10°C
13°C
20°C
19. _____ 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
Mixture of Rime and Clear ice
Rime
Glazed
20. Rime is formed by freezing of ____ supercooled water droplets on airframe when air is flying through clouds
Large
Medium
Small
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