17.2.1

17. 2. Propeller construction.

NOTE

TO CHECK YOUR PREPARATION ,PLZ WRITE DOWN THE SELECTED OPTIONS ON ROUGH PAGE AND  AT THE END OF QUIZ , VERIFY YOUR SELECTED OPTION WITH THE CORRECT OPTIONS GIVEN BELOW

 Question number. 1. A fibreglass composite blade.

Option a. Will never be struck by lighting.

 Option b. Does not require lightning strike protection.

 Option c. Requires lightning strike protection.

Correct answer is. Requires lightning strike protection.

Question number. 2. The timber most often used today for propeller construction is.

Option a. Birch. Option b. Spruce.

Option c. Balsa.

Correct answer is. Birch.

Question number. 3. Electronic torque measuring systems utilise.

 Option a. Strain gauges in the reduction gear.

Option b. Stress gauges in the reduction gear.

 Option c. Pressure transducers in the reduction gear.

Correct answer is. Strain gauges in the reduction gear.

Question number. 4. A conventional turboprop torque meter uses.

Option a. Hydraulic oil as the pressure medium.

Option b. Coiled spring levers as the pressure medium.

Option c. Engine oil as the pressure medium.

Correct answer is. Engine oil as the pressure medium.

 Question number. 5. Metal at the tip and along the leading edge of a wooden propeller is.

Option a. For balancing.

Option b. For protection.

Option c. For anti-icing.

Correct answer is. For protection.

Question number. 6. Blade cuffs are fitted to the root of the blades.

Option a. To increase the strength of the blade.

 Option b. To increase thrust.

Option c. To increase flow of cooling air into the engine nacelle.

Correct answer is: C

ABOVE QUESTIONS WITH ANSWERS 

17. 2. Propeller construction.

 Question number. 1. A fibreglass composite blade.

Option a. Will never be struck by lighting.

 Option b. Does not require lightning strike protection.

 Option c. Requires lightning strike protection.

Correct answer is. Requires lightning strike protection.

Question number. 2. The timber most often used today for propeller construction is.

Option a. Birch. Option b. Spruce.

Option c. Balsa.

Correct answer is. Birch.

Question number. 3. Electronic torque measuring systems utilise.

 Option a. Strain gauges in the reduction gear.

Option b. Stress gauges in the reduction gear.

 Option c. Pressure transducers in the reduction gear.

Correct answer is. Strain gauges in the reduction gear.

Question number. 4. A conventional turboprop torque meter uses.

Option a. Hydraulic oil as the pressure medium.

Option b. Coiled spring levers as the pressure medium.

Option c. Engine oil as the pressure medium.

Correct answer is. Engine oil as the pressure medium.

 Question number. 5. Metal at the tip and along the leading edge of a wooden propeller is.

Option a. For balancing.

Option b. For protection.

Option c. For anti-icing.

Correct answer is. For protection.

Question number. 6. Blade cuffs are fitted to the root of the blades.

Option a. To increase the strength of the blade.

 Option b. To increase thrust.

Option c. To increase flow of cooling air into the engine nacelle.

Correct answer is: C