Take SLCAA ATC Knowledge Test Practice Questions - Sierra Leone Civil Aviation Authority Air Traffic Controller Knowledge Test Exam

QUESTION 1 / 25

According to ICAO Annex 11 and SLCAR Part 1A, what is the primary objective of the Air Traffic Control (ATC) service?

Choose one answer below.

ATo prevent collisions between aircraft and between aircraft and obstacles on the maneuvering area, and to expedite and maintain an orderly flow of air traffic✓BTo monitor airline flight schedules and enforce ground handling punctuality✓CTo provide weather forecasting and meteorological observations for all departing aircraft✓DTo issue landing fees and administrative clearances for commercial operators✓

QUESTION 2 / 25

Under ICAO Annex 2 rules governing airspace classification, which statement correctly describes VFR flight operations in Class A airspace?

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AVFR flights are permitted subject to continuous two-way radio communication✓BVFR flights are not permitted in Class A airspace✓CVFR flights are permitted provided flight visibility is at least 8 km✓DVFR flights are permitted only during daylight hours under Special VFR clearance✓

QUESTION 3 / 25

What is the standard minimum vertical separation applied between IFR aircraft below Flight Level 290 under standard ICAO ATS procedures?

Choose one answer below.

A500 feet (150 m)✓B1,000 feet (300 m)✓C1,500 feet (450 m)✓D2,000 feet (600 m)✓

QUESTION 4 / 25

What standard atmospheric pressure value is set on an altimeter to display Flight Levels when operating above the Transition Altitude?

Choose one answer below.

A1000.0 hPa✓B1013.25 hPa (29.92 inHg)✓C1020.0 hPa (30.12 inHg)✓D992.0 hPa (29.29 inHg)✓

QUESTION 5 / 25

Under ICAO Annex 2, a surface of constant atmospheric pressure related to a specific pressure datum of 1013.25 hPa and separated by specific pressure intervals is defined as a:

Choose one answer below.

ATransition Height✓BFlight Level✓CTerrain Clearance Floor✓DTrue Altitude✓

QUESTION 6 / 25

What are the standard Visual Meteorological Conditions (VMC) visibility and cloud distance minima for VFR aircraft operating at or above 10,000 ft AMSL in Class C, D, and E airspace?

Choose one answer below.

A5 km flight visibility, 1,500 m horizontal and 1,000 ft vertical distance from cloud✓B8 km flight visibility, 1,500 m horizontal and 1,000 ft vertical distance from cloud✓C10 km flight visibility, 2 NM horizontal and 2,000 ft vertical distance from cloud✓D8 km flight visibility, clear of cloud and in sight of the surface✓

QUESTION 7 / 25

According to ICAO Doc 4444 (PANS-ATM), how is 'Transition Altitude' defined?

Choose one answer below.

AThe altitude at or below which the vertical position of an aircraft is controlled by reference to altitudes (QNH)✓BThe lowest flight level available for use above the transition layer✓CThe height above the aerodrome elevation at which altimeter setting must be changed from QFE to QNH✓DThe altitude specified by ATC below which high-speed vectoring is prohibited✓

QUESTION 8 / 25

When two power-driven heavier-than-air aircraft are converging at approximately the same level, which aircraft has the right-of-way under ICAO Annex 2 Rules of the Air?

Choose one answer below.

AThe aircraft that has the other on its left✓BThe aircraft that has the other on its right✓CThe faster aircraft✓DThe aircraft flying under an IFR flight plan✓

QUESTION 9 / 25

Which regulatory authority in Sierra Leone enforces compliance with SLCAR Part 1A and issues Air Traffic Controller licenses?

Choose one answer below.

ASierra Leone Airports Authority (SLAA)✓BSierra Leone Civil Aviation Authority (SLCAA)✓CMinistry of Transport and Aviation (MTA)✓DRoberts FIR Secretariat✓

QUESTION 10 / 25

According to ICAO Annex 11, which ATS units are responsible for providing Alerting Service?

Choose one answer below.

AOnly Rescue Coordination Centres (RCC)✓BFlight Information Centres (FIC) and Air Traffic Control units (TWR, APP, ACC)✓COnly Area Control Centres (ACC)✓DAerodrome Flight Information Service (AFIS) units exclusively✓

QUESTION 11 / 25

Under the standard ICAO semi-circular cruising level system (Annex 2 Appendix 3), what flight level allocation rule applies to an IFR flight operating on a magnetic track of 075°?

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AEven Flight Levels (e.g., FL 080, FL 100, FL 120)✓BOdd Flight Levels (e.g., FL 070, FL 090, FL 110)✓COdd Flight Levels plus 500 ft (e.g., FL 075, FL 095)✓DEven Flight Levels plus 500 ft (e.g., FL 085, FL 105)✓

QUESTION 12 / 25

What is the physical scope of jurisdiction for an Aerodrome Control Tower (TWR) per ICAO Annex 11?

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AThe maneuvering area and all aircraft flying in the vicinity of the aerodrome✓BThe entire movement area including aprons, plus all en-route airspace within 50 NM✓COnly aircraft on the active runway centerline✓DAll aircraft operating below 10,000 ft AMSL within the Flight Information Region✓

QUESTION 13 / 25

According to ICAO Annex 2, unless otherwise prescribed by the appropriate ATS authority, a flight plan for a flight intending to cross international borders shall be submitted at least how long before departure?

Choose one answer below.

A15 minutes✓B30 minutes✓C60 minutes✓D120 minutes✓

QUESTION 14 / 25

In Class C airspace, what level of ATC service and separation is provided to VFR flights under ICAO Annex 11?

Choose one answer below.

ASeparated from all other VFR and IFR flights✓BSeparated from IFR flights and given traffic information in respect of other VFR flights✓CGiven traffic information only in respect of all flights✓DNo ATC service is provided to VFR flights in Class C✓

QUESTION 15 / 25

Which airspace classification guarantees ATC separation between ALL participating aircraft (IFR from IFR, IFR from VFR, and VFR from VFR)?

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AClass A Airspace✓BClass B Airspace✓CClass C Airspace✓DClass D Airspace✓

QUESTION 16 / 25

Under ICAO Annex 2 and Doc 4444, what are the maximum weather minima below which an ATC unit MUST NOT issue a Special VFR clearance to an aircraft taking off or landing at an aerodrome within a Control Zone?

Choose one answer below.

AGround visibility less than 1,500 m or cloud ceiling less than 600 ft (180 m)✓BGround visibility less than 3,000 m or cloud ceiling less than 1,000 ft (300 m)✓CGround visibility less than 5 km or cloud ceiling less than 1,500 ft (450 m)✓DGround visibility less than 800 m or cloud ceiling less than 300 ft (90 m)✓

QUESTION 17 / 25

Which standard ICAO document contains the detailed operational rules for Air Traffic Management known as PANS-ATM?

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AICAO Doc 7300✓BICAO Doc 4444✓CICAO Doc 8168✓DICAO Doc 9432✓

QUESTION 18 / 25

An aircraft operating in controlled airspace experiences a total loss of two-way radio communications. Which SSR transponder code must the pilot select immediately under ICAO Annex 2?

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ACode 7500✓BCode 7600✓CCode 7700✓DCode 2000✓

QUESTION 19 / 25

What is the official ICAO definition of a Control Zone (CTR)?

Choose one answer below.

AA controlled airspace extending upwards from the surface of the earth to a specified upper limit✓BA controlled airspace extending upwards from a specified height above the surface of the earth✓CAn advisory airspace established around unpowered glider operations✓DA non-controlled airspace established around military training sectors✓

QUESTION 20 / 25

Under the semi-circular cruising level table (ICAO Annex 2 Appendix 3), what cruising levels are designated for VFR flights operating on magnetic tracks from 180° to 359° (Westbound)?

Choose one answer below.

AOdd Flight Levels (FL 050, FL 070, FL 090)✓BEven Flight Levels plus 500 ft (FL 045, FL 065, FL 085)✓COdd Flight Levels plus 500 ft (FL 055, FL 075, FL 095)✓DEven Flight Levels (FL 060, FL 080, FL 100)✓

QUESTION 21 / 25

Which ATS facility is primarily responsible for providing Flight Information Service (FIS) and Alerting Service within an entire Flight Information Region (FIR)?

Choose one answer below.

AFlight Information Centre (FIC) or Area Control Centre (ACC)✓BAerodrome Control Tower (TWR) exclusively✓CApproach Control Office (APP) exclusively✓DAeronautical Information Service (AIS) unit✓

QUESTION 22 / 25

How does ICAO Annex 11 define 'Controlled Airspace'?

Choose one answer below.

AAirspace of defined dimensions within which air traffic control service is provided in accordance with the airspace classification✓BAny airspace situated directly above an international airport within 10 NM✓CAirspace extending from Flight Level 195 to Flight Level 600 worldwide✓DAirspace reserved exclusively for state and military aircraft✓

QUESTION 23 / 25

When two aircraft are approaching head-on or approximately so in flight, what avoidance maneuver MUST be taken by both pilots according to ICAO Annex 2?

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ABoth aircraft shall alter heading to the right✓BBoth aircraft shall alter heading to the left✓CThe higher aircraft shall climb, and the lower aircraft shall descend✓DThe faster aircraft shall turn right, and the slower aircraft shall maintain heading✓

QUESTION 24 / 25

Under ICAO Annex 2 definitions, what portion of an aerodrome constitutes the 'Maneuvering Area'?

Choose one answer below.

AThat part of an aerodrome to be used for the take-off, landing, and movement of aircraft associated with take-off and landing, excluding aprons✓BThe entire movement area including all maintenance hangars and passenger aprons✓COnly the active runway in use✓DThe area designated for aircraft parking, fueling, and passenger loading✓

QUESTION 25 / 25

Under ICAO Annex 2, by how much must the time estimate for the next reporting point, FIR boundary or destination be in error before the pilot of a controlled flight must pass a revised estimate to ATS?

Choose one answer below.

AIn excess of 3 minutes✓BIn excess of 10 minutes✓CIn excess of 15 minutes✓DOnly when ATC specifically requests an updated estimate✓