3-34. 3–35. 3–36. 3-37. 3-38. 3-39. A  brake  light  is  usually  combined with the taillight using what type of bulb? 1. Single-contact,    double–filament 2. Double-contact,    double–filament 3. Double-contact,  florence  filled 4. Single-contact,    single–filament Brakes  lights  are  a  safety-required item and must be operational at all times. 1. True 2. False Which of the following lights must turn  off  automatically  when  a vehicle is moving forward? 1. Brake 2. Parking 3. Backup 4. Side  marker Which of the following components is the weakest point in an automotive  electrical  circuit? 1. The bulb The fuse 3. The  wiring 4. The  electrical  connections 2. Learning Objective: Recognize the  principles  and  components of  gauges. When the temperature reading on a water temperature gauge starts to rise, you should stop and determine the  reason. 1. True 2. False Cold water should be added to an overheated  engine  when  it  is  NOT running. 1. True 2. False 3–40. After  an  engine  is  started,  what is the rule of thumb for the oil pressure  gauge? 1.  It of 2.   It of 3.  It of 4.  It of should  indicate  10  pounds pressure in 30 seconds should  indicate  30  pounds pressure in 30 seconds should  indicate  60  pounds pressure  in  30  seconds should  indicate  90  pounds pressure  in  90  seconds 3-41. A low air pressure warning light or buzzer should come on when the air pressure drops below which of the following  pressures? 1. 60 psi 2. 90 psi 3. 120  psi 4. 150 psi 3-42. What action should you take if the hydraulic fluid level is normal, but  the  hydraulic  fluid  temperature gauge indicates the fluid has exceeded  the  recommended  operating temperature  range? 1. Continue to operate at a slow speed 2. Shut down the engine to allow the hydraulic fluid to cool 3. Idle the engine to allow the hydraulic fluid to cool 4. Continue  to  operate  running the engine at full speed 3–43. When operating a piece of equip- ment,   what action should you take if the fuel gauge does NOT indicate any depletion of fuel? 1. Visually  check  the  fuel  level from time to time 2. Assume the fuel tank is full 3. Ignore the gauge 4. Park the equipment and notify the mechanic field crew 20