NRA NRA Sight Systems & Optics 3

Question 1

What is the correct procedure for zeroing a rifle scope at 100 yards?

Accepted Answer

Firing test groups and adjusting windage/elevation until the point of impact consistently matches point of aim at 100 yards

Answer

Setting all adjustment turrets to their mechanical center position before mounting

Answer

Aligning the scope tube parallel to the bore using a collimator only

Answer

Setting magnification to maximum power and aligning the crosshair with the front sight bead

Question 2

What is the recommended method to verify a scope's reticle is properly leveled during installation?

Accepted Answer

Using a scope leveling kit with dual bubble levels on the action and scope

Answer

Visually estimating alignment with a horizontal surface in the background

Answer

Aligning the vertical crosshair with the front sight post

Answer

Measuring the distance from the reticle to the bore center

Question 3

What torque range is most commonly recommended for scope ring cap screws to ensure secure retention without damaging the scope tube?

Accepted Answer

15–18 inch-pounds

Answer

2–5 inch-pounds

Answer

45–55 inch-pounds

Answer

80–100 inch-pounds

Question 4

What is the primary aiming advantage of a red dot (reflex) sight compared to traditional iron sights?

Accepted Answer

Faster target acquisition with both eyes open, requiring only a single focal plane

Answer

Increased magnification for precise long-range target identification

Answer

Reduced point of impact shift caused by recoil

Answer

Improved accuracy in direct bright sunlight without lens glare

Question 5

What is the purpose of lapping scope rings before mounting a scope?

Accepted Answer

Removing material to ensure the ring bores are concentric and provide full, even contact with the scope tube

Answer

Polishing the ring exterior surface for corrosion resistance

Answer

Increasing the clamp force by reducing the gap between ring halves

Answer

Removing the factory protective coating before applying thread-locking compound

Question 6

What is the function of a cantilever scope mount on an AR-15 flat-top receiver?

Accepted Answer

To extend the scope forward along the rail to achieve proper eye relief distance

Answer

To raise the scope higher for use with suppressed muzzle devices

Answer

To provide additional windage adjustment beyond the scope's internal range

Answer

To allow the scope to be removed and reattached without loss of zero

Question 7

Which cleaning method is correct for maintaining the lens coatings on a rifle scope?

Accepted Answer

Using lens-specific cleaning solution and a microfiber or lens tissue only

Answer

Using household ammonia-based glass cleaner applied with a paper towel

Answer

Rinsing with hot tap water followed by air drying

Answer

Polishing with automotive lens restorer to remove micro-scratches