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Key Facts: CASAS IR Theory Exam

60

Published IRA questions

CASAS IR Knowledge Test Guide

75%

Pass mark

CASAS IR Knowledge Test Guide

2.5 hours

Maximum time

CASAS IR Knowledge Test Guide

Free 2026 independent CASAS IR practice. The published IRA test has 60 questions, up to 2.5 hours, and a 75% pass mark. Official written-test delivery languages were not explicitly confirmed. Items naming FAA charts teach that specific convention, not a universal Suriname rule.

Sample CASAS IR Theory Practice Questions

Try these sample questions to review concepts for the CASAS IR Theory exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Under Civil Aviation Regulations Suriname (CARS) Part 2, what aeronautical experience is required for the issuance of an Instrument Rating in the aeroplane category?
A.At least 50 hours of cross-country flight time as pilot-in-command and 40 hours of instrument time
B.At least 20 hours of dual flight instruction and 10 hours of solo flight at night
C.At least 100 hours of instrument flight time in multi-engine aircraft
D.At least 250 hours of total flight time of which 100 hours must be cross-country
Explanation: CARS Part 2 requires 50 hours of cross-country PIC time, including the required time in the appropriate category, and 40 hours of instrument time for initial IR experience. Approved training-device credit is subject to specific limits and training arrangements. These totals do not replace the required instruction, knowledge test, and skill test.
2What is the minimum recent instrument experience required under CARS Part 2 to act as pilot-in-command of an aeroplane under IFR or in weather conditions less than VMC?
A.Within the preceding six months, a qualifying instrument proficiency check, or six hours of instrument time including three hours in flight in the category, six approaches, holding, and intercepting/tracking tasks
B.Within the preceding 90 days, at least 3 instrument approaches to a full stop landing at night
C.Within the preceding 12 calendar months, a complete flight review with an authorized instructor
D.Within the preceding 30 days, at least 1 hour of flight time under the hood with a safety pilot
Explanation: CARS 2.3.1.6(f) provides two routes within the preceding six months: the prescribed instrument proficiency check, or six hours of actual or simulated instrument time including at least three hours in flight in the category, with six approaches, holding, and intercepting/tracking tasks. Approaches alone are insufficient. Apply any additional checking requirements relevant to the operation.
3Under CARS Part 8, what are the standard IFR alternate airport weather minimums at the estimated time of arrival for an airport with an authorized precision approach procedure?
A.Ceiling 400 feet and visibility 1 statute mile (1,600 m)
B.Ceiling 600 feet and visibility 3 km (2 SM as stated in CARS)
C.Ceiling 800 feet and visibility 5 km (3 SM as stated in CARS)
D.Ceiling 1,000 feet and visibility 3 statute miles (5,000 m)
Explanation: Where alternate minima are not published and use as an alternate is not prohibited, CARS 8.6.2.7 gives aeroplane planning values of 180 m (600 ft) ceiling and 3 km (2 SM) visibility for a precision approach. For a non-precision approach it states 240 m (800 ft) and 5 km (3 SM). Use published or approved operator minima when applicable; do not substitute the US 800-2 rule.
4For an aeroplane IFR flight subject to the general fuel rule in CARS 8.6.2.15, which provision applies when a destination alternate is required?
A.Fuel to reach the destination plus 30 minutes at normal cruising speed
B.Fuel to reach the destination, fly to the alternate aerodrome (if required), and fly thereafter for at least 45 minutes at normal cruising consumption
C.Fuel to fly for 2 hours beyond the destination aerodrome
D.Fuel to reach the destination, plus 10% contingency fuel with no alternate requirement
Explanation: The cited general IFR rule provides for flight to the intended landing aerodrome, then to the required alternate, and thereafter at least 45 minutes at normal cruising altitude. Special commercial and turbine fuel-planning provisions can impose different component calculations. A single generic reserve should not be applied to every operation.
5Under CARS 8.8.4.19, an IFR aircraft loses communications in IMC while being radar vectored without a specified limit. What route action is prescribed, taking account of minimum flight altitude?
A.Fly direct to the nearest uncontrolled airport and land immediately
B.Rejoin the current flight-plan route no later than the next significant point, taking the applicable minimum flight altitude into account
C.Reverse course immediately and fly the reverse of the outbound track
D.Maintain the present heading until intercepting the Paramaribo VOR
Explanation: CARS 8.8.4.19 specifies rejoining the current flight-plan route no later than the next significant point after vectors or an RNAV offset without a specified limit. Applicable minimum flight altitude remains relevant. The US AVEF mnemonic is not the procedure published in this Suriname provision.
6Under CARS 8.8.4.19, absent a different regional prescription, which speed and level are maintained during the initial seven-minute period after an IMC communications failure in radar ATC airspace?
A.Maintain the lowest published airway altitude along the entire route
B.Maintain the last assigned speed and level, or the minimum flight altitude if higher, then adjust speed and level according to the filed flight plan after the prescribed period
C.Descend immediately to 3,000 feet MSL to remain below the cloud deck
D.Climb immediately to the aircraft's service ceiling to improve radar reception
Explanation: Initially maintain the last assigned speed and level, with the minimum flight altitude taking precedence if higher. The seven-minute period starts from the latest of reaching that level/minimum altitude, setting code 7600, or failing to report over a compulsory reporting point. Thereafter adjust speed and level according to the filed flight plan; regional provisions must also be checked.
7What is the difference between a Decision Altitude (DA) and a Minimum Descent Altitude (MDA)?
A.DA is referenced to mean sea level while MDA is referenced to airport elevation
B.DA is the decision altitude for a 3D approach using vertical guidance; MDA is a limiting altitude for a 2D approach below which descent requires the prescribed visual conditions
C.MDA requires an automatic autopilot disconnect while DA is flown purely manually
D.DA applies only to category D transport aircraft while MDA applies to light aircraft
Explanation: At DA on a 3D approach, initiate a missed approach if the required visual reference and landing conditions are absent. MDA is a floor on a 2D approach until the conditions for further descent are met. An LPV procedure uses a DA but should not simply be classified as an ILS precision approach; follow the published procedure and approvals.
8Under CARS Part 8, what visual reference must be distinctly visible and identifiable to the pilot before descending below Decision Altitude (DA) or Minimum Descent Altitude (MDA)?
A.The aerodrome rotating beacon or tower cab
B.At least one of the approved runway environment elements, such as the approach light system, threshold, threshold markings, threshold lights, runway end identifier lights, or runway markings/lights
C.The terminal building or main hangar complex
D.A lit highway or coastline adjacent to the aerodrome
Explanation: Under CARS Part 8 (and ICAO Annex 6 / FAA 91.175), no pilot may operate below DA/MDA unless the aircraft is in a position to land using normal maneuvers at normal descent rate, flight visibility is at or above minimums, and at least one visual reference for the runway environment is distinctly visible (approach lights, threshold, threshold lights, REIL, VASI/PAPI, touchdown zone, or runway lights).
9If only the approach light system is visible when reaching Decision Altitude (DA) on an ILS approach, to what altitude is the pilot permitted to descend?
A.The pilot may descend all the way to touchdown
B.The pilot may not descend below 100 feet above the touchdown zone elevation unless the red terminating bars or red side row bars are also distinctly visible and identifiable
C.The pilot must immediately execute a missed approach without descending further
D.The pilot may descend to 200 feet AGL and circle to land
Explanation: Under CARS Part 8 and standard ICAO approach rules, seeing the approach lighting system allows the pilot to descend down to 100 feet above the touchdown zone elevation (TDZE). The pilot cannot descend below 100 ft above TDZE unless the red terminating bars or red side row bars (on ALSF-I or ALSF-II systems) or other runway elements are distinctly visible.
10What is the defining characteristic of a Minimum En-route Altitude (MEA) published on an en-route IFR aeronautical chart?
A.It provides obstacle clearance along the route and ensures acceptable navigational signal coverage between radio navigation aids
B.It provides obstacle clearance only, with no guarantee of radio reception
C.It is the maximum altitude at which an unpressurized aircraft may cruise
D.It indicates the altitude where radar vectoring service terminates
Explanation: The Minimum En-route Altitude (MEA) is the lowest published altitude between radio fixes that assures acceptable navigational signal coverage along the entire segment and meets obstacle clearance requirements (1,000 ft in non-mountainous terrain, 2,000 ft in mountainous areas).

About the CASAS IR Theory Exam

Independent English-language MCQ study adaptation by OpenExamPrep for CASAS Instrument Rating—Aeroplane theory. It is not an official translation or exact test simulation and cannot replace practical instrument flying or oral skill assessment.

Exam sponsor: Civil Aviation Safety Authority Suriname (CASAS). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

Written single-response MCQs across eight subjects. This bank focuses on aeroplane IFR theory. Rating qualification also requires practical instrument-flight and oral/ground evaluation under the skill standards. No separate coursework or case-study submission is specified in the reviewed guide.

Time Limit

Up to 2.5 hours

Passing Score

75%

Exam / Certification Fees

Posted theory tariff: USD 50; confirm the current payable fee with CASAS

Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Official sources

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

Not published

Air Law

CARS IFR rules and ATS procedures.

Not published

Aircraft General Knowledge

Instruments, avionics, and aircraft control.

Not published

Flight Performance, Planning and Loading

IFR preparation, fuel, and descent calculations.

Not published

Human Performance

Instrument scan, illusions, and workload.

Not published

Meteorology

Icing, weather products, and hazard interpretation.

Not published

Navigation

Radio aids, GNSS, and procedure guidance.

Not published

Operational Procedures

Departures, approaches, holds, and missed approaches.

Not published

Radiotelephony

Clearances, reports, and communications failure.

Preparing for the CASAS IR Theory Exam

What You Need to Know

  • Passing score: 75%
  • Assessment: Written single-response MCQs across eight subjects. This bank focuses on aeroplane IFR theory. Rating qualification also requires practical instrument-flight and oral/ground evaluation under the skill standards. No separate coursework or case-study submission is specified in the reviewed guide.
  • Time limit: Up to 2.5 hours
  • Exam / certification fees: Posted theory tariff: USD 50; confirm the current payable fee with CASAS Official sources

Using Our Practice Resources

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

CASAS IR Theory: Suggested Study Strategy

1Study CARS communication-failure procedures directly; US AVEF mnemonics are not a substitute.
2Use the current chart publisher's legend, AIP, NOTAMs, and approved avionics manuals.
3Work climb-gradient, descent-distance, bearing, and time calculations, and practice instrument flight with an authorized instructor.

Frequently Asked Questions

What are the published Suriname alternate planning values?

When no alternate minima are published and use is permitted, CARS 8.6.2.7 states 600 ft ceiling and 3 km visibility for a precision procedure, or 800 ft and 5 km for a non-precision procedure. Published and approved operator minima take precedence where applicable.

Does this bank confirm an official English sitting?

No. The reviewed English pilot publications do not explicitly list all written-test delivery-language options. Confirm with CASAS. This is independent English-language MCQ practice, not an official translation or a substitute for oral and practical instrument assessment.

Why do some questions identify FAA terminology?

The CASAS guide lists FAA training references. Those questions explicitly identify US chart or clearance conventions; they do not establish that a US procedure or weather product is used in Suriname. Use current local publications operationally.

Are the subject weights and fee current 2026 quotations?

The guide publishes eight subjects without percentage weights. The currently posted tariff lists USD 50 for instrument theory in a 2002 resolution; obtain the payable amount and sitting details from CASAS.