NAR HPR Launch Procedures & Checklists 3

Question 1

What is the function of a 'continuity check' performed before launch?

Accepted Answer

It confirms an electrical circuit is complete from the launch controller through the igniter

Answer

A continuity check sends a low-current signal through the firing circuit to confirm the circuit is complete and the igniter is properly connected before launch.

Question 2

Under NAR safety rules, who has authority to abort a launch during the countdown?

Accepted Answer

Any range safety officer or the LCO — the first to call abort takes effect

Answer

Either the RSO or LCO may call an abort at any point during the countdown; the first person to call abort stops the launch immediately.

Question 3

A rocket's ejection charge fires at apogee but the main chute opens too low. Which checklist item was most likely missed?

Accepted Answer

Confirming the altimeter's main deployment altitude setting

Answer

The altimeter's main deployment altitude must be set and verified during the pre-flight checklist to ensure the main parachute deploys at the correct altitude.

Question 4

When transporting a high-power rocket with a loaded motor to the launch pad, which precaution is essential?

Accepted Answer

The igniter must NOT be installed; it is installed only after the rocket is secured on the pad

Answer

Installing the igniter before reaching the pad creates an ignition hazard; NAR rules require the igniter to be installed only after the rocket is secured on the launch rail.

Question 5

What does the term 'hangfire' describe in rocketry launch procedures?

Accepted Answer

A delayed ignition that occurs after the initial firing attempt appears to have failed

Answer

A hangfire is a delayed ignition where the motor fires after a period that initially appeared to be a misfire, creating a serious safety hazard if personnel approach too soon.

(NAR HPR) NAR High-Power Rocketry Certification Practice Test

(NAR HPR) NAR High-Power Rocketry Certification Practice Test

NAR HPR Launch Procedures & Checklists 3