Efficiency and Pneumatic Systems: Analysis and Troubleshooting, Exams of Electrical Engineering

Download Efficiency and Pneumatic Systems: Analysis and Troubleshooting and more Exams Electrical Engineering in PDF only on Docsity! MILLWRIGHT INTERPROVINCIAL (RED SEAL) REVIEW EXAM 3 2024 1. How is efficiency found? A) output over input B) input over output C) output times input times 100 D) output times input divided by hp - correct answer✔✔ A) Output over input 2. What is the maximum capacity in kg of a heavy duty ladder? A) 136 B) 113 C) 102 D) 91 - correct answer✔✔ B)113 . Worn ring grooves on an engine piston will cause: A) the rings to rock back and forth. B) combustion gases to blow by the rings into the crankshaft. C) oil consumption. D) all of the above. - correct answer✔✔ D) All the above What is feed back? A) The term used when a signal that is derived from an amplifier is sent back to the position measuring device at the solenoid or actuator B) The term used when a signal that is derived from a position measuring device at the solenoid or actuator is sent back to the amplifier card C) The wave form kick emitted from an inductive loads with a DC supply D) Harmonic activity associated with noise from AC waveforms - correct answer✔✔ B) The term used when a signal that is derived from a position measuring device at the solenoid or actuator is sent back to the amplifier card 1. What should be checked if a motor has a loss of power? A) Internal leaks in valve spool or in cylinders, vane tips or gears B) Internal leaks in cylinders, vane tips or gear teeth and case C) Relief valve setting too low D) Cavitation E) Misalignment F) Bearings - correct answer✔✔ C) Relief valve setting too low Environmental pollution in pneumatic systems occurs in the form of: A) dirt or dust B) noise and oil mists C) cavitation and aeration - correct answer✔✔ B) noise and oil mist 1. Which of the following is a possible cause of pressure relief valve problems? A) Incorrect adjustment B) Damaged or worn valves C) Broken springs D) All of the above - correct answer✔✔ D) All the above Steel piping used with engines should be pickled which is: A) running an acid bath through the piping. B) painting to prevent rust. C) spraying it with a silicone sealing compound. D) a form of sanding. - correct answer✔✔ A) Running an acid bath through the piping On the supplier label with WHMIS, the precautionary statement deals with A) the name code or number used to identify the product B) handling and storage of the product C) a statement that a MSDS is available D) describes the physical and health hazards. - correct answer✔✔ B) handling and storage of the product 1. A relay coil has a single pole switch connected to the coil. The N.O. contact of the relay is connected to a lamp. Place the following steps from the list below in order of occurrence (1 through 5) when energizing the circuit. 1. The armature is pulled towards the core and closes the contacts. 2. The relay coil energizes, magnetizing the core. 3. The initiating device is activated or closed. 4. When the contacts close the lamp illuminates. 5. The core attracts the armature. A) 1,3,2,4,5 B) 3,2,5,1,4 C)3,5,2,1,4 D) 2,3,1,5,4 - correct answer✔✔ B) 3,2,5,1,4 If phase readings at both ends of the rotor are the same then a ______ imbalance condition exists. A) dynamic B) static C) couple - correct answer✔✔ B) static Which of the following is true with respect to using oil as lubrication? A) It is more convenient to retain B) It contains contaminants C) It carries away heat D) Cannot permit high speeds - correct answer✔✔ C) It carries away heat Which of the following best describes an axial labyrinth seal? A) It can only tolerate very limited axial and radial movements B) It is the simplest and cheapest C) It does not alter widths of gaps allowing them to be very small - correct answer✔✔ C) it does not alter widths of gaps allowing them to be very small Which of the following best describes a matched set bearing? A) Can not be used in random order B) Can be installed back to back or face to face C) It has a 30 or 32 degree contact angle D) It can handle reversing thrust loads in either direction E) It is designed for pure thrust load only - correct answer✔✔ A) Can not be used in random order 1. During housing inspection while installing bearings, if the bore does not have any visible damage, the bore should measure out to an accuracy of ___inch? A) 1 B) 0.1 C) 0.01 D) 0.001 - correct answer✔✔ D)0.001 The type of insulation used for temperature above 815 degrees Celsius is called: A) cryogenic. B) thermal. C) refractory. D) granular. - correct answer✔✔ C) Refractory An application such as a crusher would require a: A) high HP coupling. B) low HP coupling. - correct answer✔✔ A) high HP coupling What is a Millwright? A) Jack of all trades B)Trades of all Jacks C) Electricians Hero D) Certified Zip Tie Technician - correct answer✔✔ A) Jack of all trades When used to torque devices the most accurate type of torque wrench is the _____ type. A) beam B) click C) dial D) signaling - correct answer✔✔ C)Dial A millwright should always check shafts for straightness because: A) bent shafts can be easily aligned if caught early .B) it reduces the noise level in the plant. C) bent shafts cause varying mesh patterns. D) it will prolong the life of bearings. - correct answer✔✔ C) Bent Shafts cause varying mesh patterns The system that is based on the circular distance from one centre of one tooth to the center of the next tooth on a gear is called the _________ system. A) diametral B) circular pitch C) metric module D) English module - correct answer✔✔ B) Circular Pitch 1. Case nut die should only be used to: B) 4 C) 3 D) 2 - correct answer✔✔ B)4 1. The principle symptoms of pump __________ are excessive noise and vibration of the pump. A) circulation B) operation C) induction D) cavitation - correct answer✔✔ D) Cavitation 1. What is the purpose of parallels used with drilling? A) used keep the bit straight B) used to raise the work piece C) they are part of a strap clamp D) used to support the back end of a strap clamp - correct answer✔✔ B) Used to raise the work piece 43. A temperature probe that can be used to shut the compressor system down in the case of a malfunction would be best placed in the: A) air intake valve. B) oil reservoir. C) water separator. D) compressor discharge. - correct answer✔✔ D) Compressor discharge if the air flow from a fan is straight, basically parallel to the fan shaft, then the fan is a/an: A) radial fan. B) axial fan. C) centrifugal fan. D) down draft fan. - correct answer✔✔ B) Axial Fan 1. Which of the following lathe dogs can be used on larger diameters? A) safety clamp B) straight tail C) standard bent tail D) clamp - correct answer✔✔ D) Clamp A plunger pump is a single-acting pump. A) True B) False - correct answer✔✔ A) True _______ roller spurs enter the main line conveyor at 90 degrees. A) Gravity B) Live C) Select D) Actuated - correct answer✔✔ A) Gravity 1. Which of the following best describes a training idler? A) They gradually trough or flatten the belt B) To be effective they are installed as close together as possible C) They are able to pivot around a centre point D) They are usually attached with a quick release mechanism and used in mining E) They are the most widely used carrying idler F) They protect the belt from damage due to running off to one side G) Used where spillage does not propose a problem - correct answer✔✔ C) They are able to pivot around a centre point 1. Typical conveyor pitches vary from 1/4 inch per foot to _____ inch per foot. A) 7/8 B) 3/4 C) 1/2 D) 3/8 - correct answer✔✔ C)1/2 What occurs at the upper critical temperature point with steel? A) all remaining ferrite and cementite change to austenite B) pearlite changes to austenite C) narrow temperature range between which austenite changes to pearlite D) pearlite changes to ferrite - correct answer✔✔ A) all remaining ferrite and cementite change to austenite When tempering, what color should be used to identify uses with shear blades? A) dark blue B) violet C) purple D) brown E) dark straw F) light straw - correct answer✔✔ D) Brown 1. A dial indicator is used for aligning a piece of equipment. If the plunger rod extends out of the dial a _____ reading is displayed. A) positive B) negative - correct answer✔✔ B)Negative 1. The power source recommended for use on GMAW is: A) DC constant current. B) DC constant voltage. C) AC reverse polarity. D) AC high frequency. - correct answer✔✔ B) DC constant voltage.