TKE 1: AUXILIARY POWER UNIT EXAM 2025/2026 QUESTIONS WITH COMPLETED & VERIFIED SOLUTIONS.

TKE 1: AUXILIARY POWER UNIT

56. WHEN THE APU MASTER SWITCH IS RELEASED, A NORMAL APU SHUT-DOWN
OCCURS:

A. WITHOUT DELAY, IN ALL CASES
B. WITH A DELAY, IN ALL CASES
C. WITH A DELAY IF THE BLEED AIR WAS IN USE - ANS -C. WITH A DELAY IF THE BLEED
AIR WAS IN USE
\57. WHAT ARE THE APU MANUAL SHUT-DOWN POSSIBILITIES IN THE COCKPIT?

A. APU MASTER SWITCH PUSHBUTTON / APU FIRE PUSHBUTTON SWITCH
B. APU MASTER SWITCH PUSHBUTTON
C. APU FIRE PUSHBUTTON SWITCH / APU SHUT-OFF PUSHBUTTON - ANS -A. APU
MASTER SWITCH PUSHBUTTON / APU FIRE PUSHBUTTON SWITCH
\58. NORMAL ELECTRICAL SYSTEM BEING AVAILABLE, YOU MAY RESTART THE APU UP
TO:

A. 31,000 FT
B. 20,000 FT
C. 39,000 FT - ANS -C. 39,000 FT
\59. WHEN THE APU IS RUNNING, THE APU FUEL PUMP:

A. RUNS WHEN TANK PUMPS PRESSURE IS NOT SUFFICIENT
B. RUNS ALL THE TIME
C. RUNS ONLY IN FLIGHT
D. RUNS WHEN THE APU FUEL PUMP IS SELECTED ON - ANS -A. RUNS WHEN TANK
PUMPS PRESSURE IS NOT SUFFICIENT
\60. NORMAL APU ROTATION SPEED (N%) IS:

A. 99% (101% FOR ENGINE START)
B. STEADY AT 99% - ANS -A. 99% (101% FOR ENGINE START)
\61. APU MASTER SWITCH SELECTED ON:

A. ON ILLUMINATES BLUE. APU SYSTEM IS SUPPLIED AND APU STARTS AT 95%, AVAIL
COMES ON
B. ON ILLUMINATES BLUE. APU SYSTEM IS SUPPLIED. APU STARTS AS SOON AS
START P/B IS DEPRESSED AND INTAKE FLAP OPENS. - ANS -B. ON ILLUMINATES BLUE.
APU SYSTEM IS SUPPLIED. APU STARTS AS SOON AS START P/B IS DEPRESSED AND
INTAKE FLAP OPENS.
\62. APU BLEED AIR IS CONTROLLED: