7-15. What   precaution(s)   must   be   observed   while working around a pitot tube system? 1. Avoid touching the tubes when the heaters are on 2. Do not obstruct the openings 3. Be   sure   the   tube   heaters   are   off   before installing protective covers 4. Each of the above IN    ANSWERING    QUESTION    7-16,    REFER    TO FIGURE 7-7 IN THE TEXT. 7-16. The altimeter indicates what altitude in feet? 1. 100 2. 401 3. 4,100 4. 40,100 7-17. An aircraft flying at 0.5 Mach is flying at what speed? 1. One and one-half the speed of sound 2. Twice the speed of sound 3. Twice the local speed of sound 4. One-half the local speed of sound 7-18. An  aircraft  flying  level  at  30,000  feet  would indicate which of the following numbers on the rate-of-climb indicator? 1. 0 2. 20 3. 30 4. 40 IN    ANSWERING    QUESTION    7-19,    REFER    TO FIGURE 7-11 IN THE TEXT. 7-19. What    does    the    hydraulic    pressure    gauge indicate? 1. 0 to 5,000 psi for one system 2. 0 to 5,000 psi for two systems 3. 0 to 3,000 psi for one system 4. 0 to 3,000 psi for two systems 7-20. At what location are the thermocouples for an exhaust gas temperature system? 1. The instrument panel 2. The circuit breaker panel 3. The inlet casing 4. The aircraft frame 7-21. What  engine  component  is  the  exhaust  gases temperature measured from? 1. Compressor 2. Tail pipe 3. Engine inlet 4. Turbine 7-22. The fuel quantity indicator displays the aircraft fuel load in what measurement? 1. Pounds 2. Gallons 3. Liters 4. Quarts 7-23. Which   of   the   following   factors   makes   the vertical    scale    indicator    more    advantageous than the radial dial indicator on Navy aircraft? 1. It is compact 2. It is light in weight 3. It is easy to read 4. Each of the above 7-24. Which of the following indicators works on the principle of a gyroscope? 1. Fuel quantity indicator 2. Attitude indicator 3. Hydraulic pressure indicator 4. Rpm indicator 7-25. What  instrument  shows  the  pilot  the  relative position of the aircraft compared to the earth’s horizon? 1. Turn and Bank indicator 2. Altitude indicator 3. Horizontal situation indicator 4. Attitude indicator 7-26. A    turn    and    bank    indicator    is    really    two instruments mounted as a single unit. 1. True 2. False 7-27. Using   the   turn   and   bank   indicator,   a   pilot making   a   properly   banked   turn   to   the   right would see the ball move to what position on the indicator? 1. Left only 2. Right only 3. Center 4. Left and then right 7-28. A gyro compass provides an accurate, stabilized indication of aircraft heading through    what    total    number    of    degrees    of azimuth? 1. 30° 2. 60° 3. 90° 4. 360° 7-24