The Vertical Separation Minimum (VSM) for flights in accordance with IFR within controlled airspace below FL290 is: a. 500 feet (150m) b. 2500 feet (750 m) c. 1000 feet (300m) d. 2000 feet (600m)

The Vertical Separation Minimum (VSM) for flights in accordance with IFR within controlled  airspace below FL290 is:  
a. 500 feet (150m)  
b. 2500 feet (750 m)  
c. 1000 feet (300m)  
d. 2000 feet (600m)
by

1 Answer

Answer :

c. 1000 feet (300m)
by

Related questions

The Vertical Separation Minimum (VSM) for flights in accordance with IFR within controlled airspace below FL290 is: a. 500 feet (150m) b. 2500 feet (750 m) c. 1000 feet (300m) d. 2000 feet (600m)

Description : The Vertical Separation Minimum (VSM) for flights in accordance with IFR within controlled airspace below FL290 is: a. 500 feet (150m) b. 2500 feet (750 m) c. 1000 feet (300m) d. 2000 feet (600m)

Last Answer : c. 1000 feet (300m)

What is the minimum vertical separation between IFR flights flying in the same direction below FL 290? a. 500ft b. 1000ft c. 2000ft d. 4000ft

Description : What is the minimum vertical separation between IFR flights flying in the same direction below FL 290? a. 500ft b. 1000ft c. 2000ft d. 4000ft

Last Answer : c. 2000ft

What is the rule concerning level or height the aircraft should maintain when flying IFR outside controlled airspace unless otherwise directed? a. 2,000 feet above the highest obstacle within 8kms of the heading b. 1,000 feet above the highest obstacle within 8kms of the estimated position of the aircraft c. 1,000 feet above the highest obstacle within 8kms of the planned track d. 2,000 feet above the highest obstacle within 8kms of the planned track

Description : What is the rule concerning level or height the aircraft should maintain when flying IFR outside controlled airspace unless otherwise directed? a. 2,000 feet above the highest obstacle within 8kms of ... planned track d. 2,000 feet above the highest obstacle within 8kms of the planned track

Last Answer : b. 1,000 feet above the highest obstacle within 8kms of the estimated position of the aircraft

The transition from IFR to VFR is done: a. On the Captain’s initiative b. Whenever an aircraft in VMC leaves controlled airspace c. If told by ATC d. At the clearance limit, disregarding the weather situation

Description : The transition from IFR to VFR is done: a. On the Captain’s initiative b. Whenever an aircraft in VMC leaves controlled airspace c. If told by ATC d. At the clearance limit, disregarding the weather situation

Last Answer : a. On the Captain’s initiative

The transition from IFR to VFR is done: a. On the Captain’s initiative b. Whenever an aircraft in VMC leaves controlled airspace c. If told by ATC d. At the clearance limit, disregarding the weather situation

Description : The transition from IFR to VFR is done: a. On the Captain’s initiative b. Whenever an aircraft in VMC leaves controlled airspace c. If told by ATC d. At the clearance limit, disregarding the weather situation

Last Answer : a. On the Captain’s initiative

What is the minimum vertical separation between IFR flights flying in the same direction below FL 290? a. 500ft b. 1000ft c. 2000ft d. 4000ft

Description : What is the minimum vertical separation between IFR flights flying in the same direction below FL 290? a. 500ft b. 1000ft c. 2000ft d. 4000ft

Last Answer : c. 2000ft

What is the rule concerning level or height the aircraft should maintain when flying IFR outside controlled airspace unless otherwise directed? a. 2,000 feet above the highest obstacle within 8kms of the heading b. 1,000 feet above the highest obstacle within 8kms of the estimated position of the aircraft c. 1,000 feet above the highest obstacle within 8kms of the planned track d. 2,000 feet above the highest obstacle within 8kms of the planned track

Description : What is the rule concerning level or height the aircraft should maintain when flying IFR outside controlled airspace unless otherwise directed? a. 2,000 feet above the highest obstacle within 8kms of the ... planned track d. 2,000 feet above the highest obstacle within 8kms of the planned track

Last Answer : b. 1,000 feet above the highest obstacle within 8kms of the estimated position of the aircraft

What is required for an IFR flight in advisory airspace? a. No flight plan required b. Flight plan required and PIC must notify of any changes regardless if wanting advisory service or not c. Flight plan required but PIC need not notify of any changes d. A flight plan is only required if advisory service is required

Description : What is required for an IFR flight in advisory airspace? a. No flight plan required b. Flight plan required and PIC must notify of any changes regardless if wanting advisory service or not c ... need not notify of any changes d. A flight plan is only required if advisory service is required

Last Answer : b. Flight plan required and PIC must notify of any changes regardless if wanting advisory service or not

When the aircraft carries serviceable Mode C transponder, the pilot shall continuously operate this mode: a. Only when directed by ATC b. Unless otherwise directed by ATC c. Only when the aircraft is flying within controlled airspace d. Regardless of ATC instructions

Description : When the aircraft carries serviceable Mode C transponder, the pilot shall continuously operate this mode: a. Only when directed by ATC b. Unless otherwise directed by ATC c. Only when the aircraft is flying within controlled airspace d. Regardless of ATC instructions

Last Answer : b. Unless otherwise directed by ATC

Pilots are not allowed to use the indent function on their SSR, unless: a. They operate outside controlled airspace b. If asked by ATC c. Within controlled airspace d. They operate a transponder with mode C

Description : Pilots are not allowed to use the indent function on their SSR, unless: a. They operate outside controlled airspace b. If asked by ATC c. Within controlled airspace d. They operate a transponder with mode C

Last Answer : b. If asked by ATC

If the track on an instrument departure is published, the pilot is expected to: a. Correct for the correct wind so as to stay within controlled airspace b. Ask ATC for another heading to steer correcting for wind c. Ignore the wind and proceed with a heading equal to the track d. Ask ATC for permission to correct heading for wind

Description : If the track on an instrument departure is published, the pilot is expected to: a. Correct for the correct wind so as to stay within controlled airspace b. Ask ATC for another heading to steer ... proceed with a heading equal to the track d. Ask ATC for permission to correct heading for wind

Last Answer : a. Correct for the correct wind so as to stay within controlled airspace

The MSA provides 300m obstacle clearance within how many miles radius of the navigation facility at the aerodrome? a. 20nm b. 30nm c. 25nm d. 15nm

Description : The MSA provides 300m obstacle clearance within how many miles radius of the navigation facility at the aerodrome? a. 20nm b. 30nm c. 25nm d. 15nm

Last Answer : c. 25nm

The person having overall responsibility of an aircraft during flight is the: a. Pilot in command b. Operator c. ATC controller if the aircraft is in controlled airspace d. Owner of the aircraft

Description : The person having overall responsibility of an aircraft during flight is the: a. Pilot in command b. Operator c. ATC controller if the aircraft is in controlled airspace d. Owner of the aircraft

Last Answer : a. Pilot in command

The transition from IFR to VFR is done: a. On the Captain’s initiative b. Whenever an aircraft in VMC leaves controlled airspace c. If told by ATC d. At the clearance limit, disregarding the weather situation

Description : The transition from IFR to VFR is done: a. On the Captain’s initiative b. Whenever an aircraft in VMC leaves controlled airspace c. If told by ATC d. At the clearance limit, disregarding the weather situation

Last Answer : a. On the Captain’s initiative

The transition from IFR to VFR is done: a. On the Captain’s initiative b. Whenever an aircraft in VMC leaves controlled airspace c. If told by ATC d. At the clearance limit, disregarding the weather situation

Description : The transition from IFR to VFR is done: a. On the Captain’s initiative b. Whenever an aircraft in VMC leaves controlled airspace c. If told by ATC d. At the clearance limit, disregarding the weather situation

Last Answer : a. On the Captain’s initiative

After an act of unlawful interference a report is to be made. When and to whom? a. Within 10 days and to the Authority of the State of Registry b. Immediately and to the Authority of the State of the airspace in which the event occurred c. Without delay, to the designated local authority and the Authority of the State of Registration d. Without delay, to the designated local authority and the Authority of the State of the Operator

Description : After an act of unlawful interference a report is to be made. When and to whom? a. Within 10 days and to the Authority of the State of Registry b. Immediately and to the Authority of ... d. Without delay, to the designated local authority and the Authority of the State of the Operator

Last Answer : d. Without delay, to the designated local authority and the Authority of the State of the Operator

Except when cleared by an ATC unit, a VFR flight cannot enter or leave a Control Zone when the cloud base is lower than: a. 1000 feet and less than 8km visibility b. 2000 feet and less than 5km visibility c. 1500 feet or less than 5km visibility d. 1000 feet and less than 5km visibility

Description : Except when cleared by an ATC unit, a VFR flight cannot enter or leave a Control Zone when the cloud base is lower than: a. 1000 feet and less than 8km visibility b. 2000 feet and less than 5km visibility c. 1500 feet or less than 5km visibility d. 1000 feet and less than 5km visibility

Last Answer : c. 1500 feet or less than 5km visibility

Hydrogen content in petroleum products varies from 12 to 15% (by weight). As a result the difference between gross and net heating value of petroleum fuels varies in the range of __________ kcal/kg. (A) 600-750 (B) 250-350 (C) 1000-1500 (D) 2000-2500

Description : Hydrogen content in petroleum products varies from 12 to 15% (by weight). As a result the difference between gross and net heating value of petroleum fuels varies in the range of __________ kcal/kg. (A) 600-750 (B) 250-350 (C) 1000-1500 (D) 2000-2500

Last Answer : (A) 600-750

International parcel box rate is a) 1000,1500 & 2500 b) 2000,3000 & 5000 c) 750,1500&2500 d) None of these

Description : International parcel box rate is a) 1000,1500 & 2500 b) 2000,3000 & 5000 c) 750,1500&2500 d) None of these

Last Answer : a) 1000,1500 & 2500

International parcel box rate is a) 1000,1500 & 2500 b) 2000,3000 & 5000 c) 750,1500&2500 d) None of these

Description : International parcel box rate is a) 1000,1500 & 2500 b) 2000,3000 & 5000 c) 750,1500&2500 d) None of these

Last Answer : a) 1000,1500 & 2500

The total pressure on the surface of a vertical sluice gate 2 m x 1 m with its top 2 m surface being 0.5 m below the water level will be (A) 500 kg (B) 1000 kg (C) 1500 kg (D) 2000 kg

Description : The total pressure on the surface of a vertical sluice gate 2 m x 1 m with its top 2 m surface being 0.5 m below the water level will be (A) 500 kg (B) 1000 kg (C) 1500 kg (D) 2000 kg

Last Answer : Answer: Option D

A three hinged arch is loaded with an isolated load 1000 kg at a horizontal distance of 2.5 m from the crown, 1 m above the level of hinges at the supports 10 metres apart. The horizontal thrust is (A) 1250 kg (B) 125 kg (C) 750 kg (D) 2500 kg

Description : A three hinged arch is loaded with an isolated load 1000 kg at a horizontal distance of 2.5 m from the crown, 1 m above the level of hinges at the supports 10 metres apart. The horizontal thrust is (A) 1250 kg (B) 125 kg (C) 750 kg (D) 2500 kg

Last Answer : (A) 1250 kg

In flight, it is possible to: i. File an IFR flight plan ii. Modify an active flight plan iii. Cancel a VFR flight plan iv. Close a VFR flight plan (rules of the air ann2 3.3.5) a. i and ii b. i, ii, iii and iv c. ii, iii and iv d. i and iv

Description : In flight, it is possible to: i. File an IFR flight plan ii. Modify an active flight plan iii. Cancel a VFR flight plan iv. Close a VFR flight plan (rules of the air ann2 3.3.5) a. i and ii b. i, ii, iii and iv c. ii, iii and iv d. i and iv

Last Answer : b. i, ii, iii and iv

Your reply to the message “REPORT FLIGHT CONDITIONS” should be: a. VFR/IFR b. SMOOTH/TURBULENT c. NOT BAD/SO SO d. VMC/IMC

Description : Your reply to the message “REPORT FLIGHT CONDITIONS” should be: a. VFR/IFR b. SMOOTH/TURBULENT c. NOT BAD/SO SO d. VMC/IMC

Last Answer : d. VMC/IMC

If a transponder is unserviceable before an IFR departure, then the pilot: a. Has to cancel the flight b. May proceed with the flight with ATC permission c. Has to fly low level only d. Should fly for another company

Description : If a transponder is unserviceable before an IFR departure, then the pilot: a. Has to cancel the flight b. May proceed with the flight with ATC permission c. Has to fly low level only d. Should fly for another company

Last Answer : b. May proceed with the flight with ATC permission

What action should be taken when, during an IFR flight in VMC, you suffer a radio failure? a. Return to the aerodrome from which you departed b. Continue flying in VMC and land as soon as possible c. Maintain your assigned altitude and land at the nearest aerodrome at which there are VMC conditions d. Continue flying at your assigned altitude and start your approach at your ETA

Description : What action should be taken when, during an IFR flight in VMC, you suffer a radio failure? a. Return to the aerodrome from which you departed b. Continue flying in VMC and land as ... there are VMC conditions d. Continue flying at your assigned altitude and start your approach at your ETA

Last Answer : b. Continue flying in VMC and land as soon as possible

The maximum temperature in the I.C engine cylinder is of the order of a. 500 – 1000 C b. 1000 – 1500 C c. 1500 – 2000 C d. 2000 – 2500 C

Description : The maximum temperature in the I.C engine cylinder is of the order of a. 500 – 1000 C b. 1000 – 1500 C c. 1500 – 2000 C d. 2000 – 2500 C

Last Answer : ANSWER d. 2000 – 2500 C

A sender uses the Stop-and-Wait ARQ protocol for reliable transmission of frames. Frames are of size 1000 bytes and the transmission rate at the sender is 80 Kbps (1Kbps = 1000 bits/second). Size of an acknowledgement is 100 bytes and the transmission rate at the receiver is 8 Kbps. The one-way propagation delay is 100 milliseconds. Assuming no frame is lost, the sender throughput is __________ bytes/second. a. 2500 b. 2000 c. 1500 d. 500

Description : A sender uses the Stop-and-Wait ARQ protocol for reliable transmission of frames. Frames are of size 1000 bytes and the transmission rate at the sender is 80 Kbps (1Kbps = 1000 bits/second). Size of ... is lost, the sender throughput is __________ bytes/second. a. 2500 b. 2000 c. 1500 d. 500

Last Answer : a. 2500

A sum of money is to be distributed among A, B, C, D in the proportion of 5:2:4:3. If C gets Rs. 1000 more than D, what is B's share? A) Rs. 500 B) Rs. 1500 C) Rs. 2000 D) Rs.2500 E) NONE

Description : A sum of money is to be distributed among A, B, C, D in the proportion of 5:2:4:3. If C gets Rs. 1000 more than D, what is B's share? A) Rs. 500 B) Rs. 1500 C) Rs. 2000 D) Rs.2500 E) NONE

Last Answer : Answer: C Let the shares of A, B, C, D be Rs. 5x, Rs. 2x, Rs. 4x and Rs. 3x respectively. Then, 4x−3x=1000 ⇒x=1000. B's share =Rs.2x=Rs.(2×1000)= Rs. 2000

How many mL of a 1:500 w/v stock solution should be used to make 5 liters of 1:2000 w/v solution? (A) 750 mL (B) 1000 mL (c) 1250 mL (D) 1500 mL

Description : How many mL of a 1:500 w/v stock solution should be used to make 5 liters of 1:2000 w/v solution? (A) 750 mL (B) 1000 mL (c) 1250 mL (D) 1500 mL

Last Answer : (c) 1250 mL

Who is responsible for reporting acts of unlawful interference? a. The Commander or the Operator b. The ATCU for the airspace in which the event occurred c. Any member of the flight crew d. Any person on board the aeroplane

Description : Who is responsible for reporting acts of unlawful interference? a. The Commander or the Operator b. The ATCU for the airspace in which the event occurred c. Any member of the flight crew d. Any person on board the aeroplane

Last Answer : a. The Commander or the Operato

You have been intercepted in the airspace of a foreign contracting state. What is the signal for ‘clear to proceed’ from the intercepting aircraft? a. Rocking wings b. Flashing lights c. Cut across track d. Breaking turn up and left

Description : You have been intercepted in the airspace of a foreign contracting state. What is the signal for ‘clear to proceed’ from the intercepting aircraft? a. Rocking wings b. Flashing lights c. Cut across track d. Breaking turn up and left

Last Answer : d. Breaking turn up and left

What are the VMC limits for Class B airspace? a. 8km flight visibility, clear of cloud and in sight of the surface b. 8km flight visibility, 1000ft vertically and 1500m horizontally from cloud c. 5km flight visibility, 1000ft vertically and 1500m horizontally from cloud d. The same as Class D

Description : What are the VMC limits for Class B airspace? a. 8km flight visibility, clear of cloud and in sight of the surface b. 8km flight visibility, 1000ft vertically and 1500m horizontally from ... . 5km flight visibility, 1000ft vertically and 1500m horizontally from cloud d. The same as Class D

Last Answer : d. The same as Class D

Where a medium category aeroplane is landing behind a heavy category aeroplane, the minimum separation distance in NM is: a. 3 b. 4 c. 5 d. 6

Description : Where a medium category aeroplane is landing behind a heavy category aeroplane, the minimum separation distance in NM is: a. 3 b. 4 c. 5 d. 6

Last Answer : c. 5

Where a light or medium category aeroplane is taking off behind a heavy category aeroplane on the same runway and from the same point, the minimum separation spacing in minutes is: a. 1 b. 2 c. 3 d. 4

Description : Where a light or medium category aeroplane is taking off behind a heavy category aeroplane on the same runway and from the same point, the minimum separation spacing in minutes is: a. 1 b. 2 c. 3 d. 4

Last Answer : b. 2

Where a light category aeroplane is landing behind a medium category aeroplane, minimum separation distance in NM is: a. 6 b. 5 c. 4 d. 3

Description : Where a light category aeroplane is landing behind a medium category aeroplane, minimum separation distance in NM is: a. 6 b. 5 c. 4 d. 3

Last Answer : b. 5

The longitudinal separation minimum based on time between aircrafts at the same FL, where there is enough coverage for navigation aids and the preceeding aircraft has a higher true airspeed of 20kts minimum is: a. 3 minutes b. 15 minutes c. 5 minutes d. 10 minutes

Description : The longitudinal separation minimum based on time between aircrafts at the same FL, where there is enough coverage for navigation aids and the preceeding aircraft has a higher true airspeed of 20kts minimum is: a. 3 minutes b. 15 minutes c. 5 minutes d. 10 minutes

Last Answer : c. 5 minutes

What is required for an IFR flight in advisory airspace? a. No flight plan required b. Flight plan required and PIC must notify of any changes regardless if wanting advisory service or not c. Flight plan required but PIC need not notify of any changes d. A flight plan is only required if advisory service is required

Description : What is required for an IFR flight in advisory airspace? a. No flight plan required b. Flight plan required and PIC must notify of any changes regardless if wanting advisory service or not c. ... need not notify of any changes d. A flight plan is only required if advisory service is required

Last Answer : b. Flight plan required and PIC must notify of any changes regardless if wanting advisory service or not

Match the items given in column I with those in column II and select the correct option given below. Column I Column II (A) Tidal volume (i) 2500 – 3000 mL (B) Inspiratory reserve (ii) 1100 – 1200 mL volume (C) Expiratory reserve (iii) 500 – 550 mL volume (D) Residual volume (iv) 1000 – 1100 mL (A) (B) (C) (D) (a) (iii) (ii) (i) (iv) (b) (iii) (i) (iv) (ii) (c) (i) (iv) (ii) (iii) (d) (iv) (iii) (ii) (i)

Description : Match the items given in column I with those in column II and select the correct option given below. Column I Column II (A) Tidal volume (i) 2500 - 3000 mL (B) Inspiratory reserve (ii) 1100 - 1200 mL volume (C) Expiratory reserve (iii ... i) (iv) (ii) (c) (i) (iv) (ii) (iii) (d) (iv) (iii) (ii) (i)

Last Answer : (b) (iii) (i) (iv) (ii)

If an ATC clearance is not suitable, the PIC may: a. Offer ATC an acceptable clearance b. Request and if practicable accept an amended clearance c. Demand an alternative clearance and ATC must comply d. Decline the clearance on the grounds that it is not in accordance with the field flight plan

Description : If an ATC clearance is not suitable, the PIC may: a. Offer ATC an acceptable clearance b. Request and if practicable accept an amended clearance c. Demand an alternative clearance and ATC must ... d. Decline the clearance on the grounds that it is not in accordance with the field flight plan

Last Answer : b. Request and if practicable accept an amended clearance

Operationally significant changes to AIP shall be published in accordance with: a. AIC’s b. AIP Supplements c. AIRAC procedures d. Trigger NOTAMS

Description : Operationally significant changes to AIP shall be published in accordance with: a. AIC’s b. AIP Supplements c. AIRAC procedures d. Trigger NOTAMS

Last Answer : c. AIRAC procedures

Elevation of temperate region from sea level ranges: a. 1000-2000 m b. 2500-3000 m c. 3500-4000 m d. b & c

Description : Elevation of temperate region from sea level ranges: a. 1000-2000 m b. 2500-3000 m c. 3500-4000 m d. b & c

Last Answer : b & c

The 10 mm markings on a levelling staff placed at 20 m are separated by (A) 1/1000 radian (B) 1/1500 radian (C) 1/2000 radian (D) 1/2500 radian

Description : The 10 mm markings on a levelling staff placed at 20 m are separated by (A) 1/1000 radian (B) 1/1500 radian (C) 1/2000 radian (D) 1/2500 radian

Last Answer : (C) 1/2000 radian

A rectangular tank 10 m x 5 m in plan and 3 m deep is divided by a partition wall parallel to the shorter wall of the tank. One of the compartments contains water to a depth of 3 m, and the other a lighter liquid of specific gravity 0.75 to a depth of 2 m. The resultant pressure thrust on the partition wall is (a) 1000 kg (b) 1500 kg (c) 2000 kg (d) 2500 kg

Description : A rectangular tank 10 m x 5 m in plan and 3 m deep is divided by a partition wall parallel to the shorter wall of the tank. One of the compartments contains water to a depth of 3 m, and the other a lighter ... pressure thrust on the partition wall is (a) 1000 kg (b) 1500 kg (c) 2000 kg (d) 2500 kg

Last Answer : Correct Answer is 15000 kg

Commercial available medium size machines have a speed range of ______ . (a) 200 to 400 r.p.m. (b) 600 to 1000 r.p.m. (c) 1000 to 1500 r.p.m. (d) 2000 to 2500 r.p.m.

Description : Commercial available medium size machines have a speed range of ______ . (a) 200 to 400 r.p.m. (b) 600 to 1000 r.p.m. (c) 1000 to 1500 r.p.m. (d) 2000 to 2500 r.p.m.

Last Answer : (d) 2000 to 2500 r.p.m.

How many hours in advance of departure time should a flight plan be filed in the case of flights into areas subject to air traffic flow management (ATFM)? a. 3.00 hrs b. 0.30 hrs c. 1.00 hr d. 0.10 hr

Description : How many hours in advance of departure time should a flight plan be filed in the case of flights into areas subject to air traffic flow management (ATFM)? a. 3.00 hrs b. 0.30 hrs c. 1.00 hr d. 0.10 hr

Last Answer : a. 3.00 hrs

Repetitive flight plans (RPL’s) cannot be used for flights other than those executed frequently on the same days of the following weeks and: a. For at least 20 occasions or every day over a period of at least 20 consecutive days b. For at least 20 consecutive days c. For at least 10 occasions or every day over a period of at least 10 consecutive days d. For at least 20 occasions

Description : Repetitive flight plans (RPL's) cannot be used for flights other than those executed frequently on the same days of the following weeks and: a. For at least 20 occasions or every day over a period of ... or every day over a period of at least 10 consecutive days d. For at least 20 occasions

Last Answer : c. For at least 10 occasions or every day over a period of at least 10 consecutive days

Normal values of overflow rate for plain sedimentation tank, is (A) 250 to 500 litres/hr/m2 (B) 500 to 750 litres/hr/m2 (C) 750 to 1000 litres/hr/m2 (D) 1000 to 1250 litres/hr/m

Description : Normal values of overflow rate for plain sedimentation tank, is  (A) 250 to 500 litres/hr/m2 (B) 500 to 750 litres/hr/m2 (C) 750 to 1000 litres/hr/m2 (D) 1000 to 1250 litres/hr/m

Last Answer : (B) 500 to 750 litres/hr/m

When the aircraft carries serviceable Mode C transponder, the pilot shall continuously operate this mode: a. Only when directed by ATC b. Unless otherwise directed by ATC c. Only when the aircraft is flying within controlled airspace d. Regardless of ATC instructions

Description : When the aircraft carries serviceable Mode C transponder, the pilot shall continuously operate this mode: a. Only when directed by ATC b. Unless otherwise directed by ATC c. Only when the aircraft is flying within controlled airspace d. Regardless of ATC instructions

Last Answer : b. Unless otherwise directed by ATC