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DGCA Technical General · 50 questions

Turn and Slip: DGCA Technical General Questions and Answers

50 practice questions on Turn and Slip with answers and explanations, plus the key concepts and formulas, from the TrueHeading question bank.

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About this topic

Use this page to revise Turn and Slip for the DGCA Technical General paper. Below are the key ideas first, then 12 practice questions with answers and explanations, picked from the 50 questions in the TrueHeading bank for this topic.

In short: A rate gyro shows rate of turn; the ball is an inclinometer for slip and skid.

Open the full set in the student zone to answer every question, track your accuracy and take timed mock tests.

Key concepts: Turn and Slip

2 ideas to know cold.

Turn and slip or turn coordinator?

A rate gyro shows rate of turn; the ball is an inclinometer for slip and skid.

  • Standard (Rate 1) turn: 3° per second, 360° in 2 minutes
  • Ball in the middle: coordinated
  • Ball to the inside: slipping; to the outside: skidding
  • Turn coordinator senses roll as well as yaw
Balancedball centredSlipball to insideSkidball to outsideright turn shown: slip = too much bank for the rate, skid = too little

What are the turn and slip indications?

Needle shows rate of turn. Ball shows balance: slip (inside) or skid (outside).

bank≈TAS10+7\text{bank}\approx\dfrac{TAS}{10}+7
  • Rate 1 = 3°/s; rate 2 = 6°/s
  • Bank for rate 1 ≈ TAS/10 + 7
  • Step on the ball

Practice questions: Turn and Slip

Tap “Show answer” after you have tried each one.

Q1A rate 1 (3°/s) turn is flown at 90 kt TAS. The radius of turn is approximately:

  1. 0.48 NM
  2. 1.50 NM
  3. 0.24 NM
  4. 0.95 NM
Show answer

Answer: A. 0.48 NM

Radius = TAS / (60π) in NM for a rate 1 turn (about TAS/188 NM).

Q2A rate 1 (3°/s) turn is flown at 110 kt TAS. The radius of turn is approximately:

  1. 0.58 NM
  2. 0.29 NM
  3. 1.17 NM
  4. 1.83 NM
Show answer

Answer: A. 0.58 NM

Radius = TAS / (60π) in NM for a rate 1 turn (about TAS/188 NM).

Q3A rate 1 (3°/s) turn is flown at 160 kt TAS. The radius of turn is approximately:

  1. 1.70 NM
  2. 2.67 NM
  3. 0.42 NM
  4. 0.85 NM
Show answer

Answer: D. 0.85 NM

Radius = TAS / (60π) in NM for a rate 1 turn (about TAS/188 NM).

Q4A rate 1 (3°/s) turn is flown at 240 kt TAS. The radius of turn is approximately:

  1. 0.64 NM
  2. 1.27 NM
  3. 4.00 NM
  4. 2.55 NM
Show answer

Answer: B. 1.27 NM

Radius = TAS / (60π) in NM for a rate 1 turn (about TAS/188 NM).

Q5A rate 1 (3°/s) turn is flown at 420 kt TAS. The radius of turn is approximately:

  1. 7.00 NM
  2. 2.23 NM
  3. 1.11 NM
  4. 4.46 NM
Show answer

Answer: B. 2.23 NM

Radius = TAS / (60π) in NM for a rate 1 turn (about TAS/188 NM).

Q6Using the rule of thumb bank angle = TAS/10 + 7, the bank angle for a rate 1 turn at 140 kt is about:

  1. 28°
  2. 16°
  3. 21°
  4. 26°
Show answer

Answer: C. 21°

Rate 1 turn bank ≈ TAS/10 + 7 degrees.

Q7Using the rule of thumb bank angle = TAS/10 + 7, the bank angle for a rate 1 turn at 200 kt is about:

  1. 27°
  2. 40°
  3. 32°
  4. 22°
Show answer

Answer: A. 27°

Rate 1 turn bank ≈ TAS/10 + 7 degrees.

Q8At a rate 3 turn (9°/s) the time to turn through 120° is:

  1. 13.3333 s
  2. 26.6667 s
  3. 40 s
  4. 6.66667 s
Show answer

Answer: A. 13.3333 s

Time = angle / rate = 120/9 = 13.3333 s.

Q9At a rate 3 turn (9°/s) the time to turn through 360° is:

  1. 80 s
  2. 40 s
  3. 20 s
  4. 120 s
Show answer

Answer: B. 40 s

Time = angle / rate = 360/9 = 40 s.

Q10The turn coordinator measures:

  1. roll rate and yaw rate
  2. pitch rate
  3. airspeed
  4. altitude rate
Show answer

Answer: A. roll rate and yaw rate

The gimbal is inclined at about 30° to the longitudinal axis.

Q11If the ball is displaced toward the outside of the turn, the aircraft is:

  1. skidding
  2. in balance
  3. climbing
  4. slipping
Show answer

Answer: A. skidding

Too little bank for the rate of turn.

Q12A rate 2 turn means a turn at:

  1. 12 degrees per second
  2. 6 degrees per second
  3. 3 degrees per second
  4. 1 degree per second
Show answer

Answer: B. 6 degrees per second

360° in one minute.

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