955 MSS Exam 1 Questions With All Correct Detailed Answers A+ Pass

955 MSS Exam 1 Questions With All Correct Detailed Answers A+ Pass What is the raised part of a shaft called? A. Bearing B. Crown C. Shoulder D. Shelf - Answer- Shoulder What type of bearing should not be greased? A. a roller bearing B. a seal bearing C. a ball bearing D. a bad bearing - Answer- A permanent seal bearing - brass bushings should not be greased Would you seat a bearing by using outer or inner surface? A. inner, with a brass hammer B. inner, with an arbor press C. outer D. none of the above - Answer- By applying pressure to the OUTER surface Why are key ways placed on a shaft? A. to keep the pulley or gear from turning on the shaft B. so you can unlock them C. So another shaft can interlock with the first shaft D. So the key stock has a place to go - Answer- To keep a pulley or a gear from turning on the shaft What is the name of a key that is placed in the keyway that has one side flat and the other side rounded? A. Key stock B. Turn key C. Woodruff key D. Salvatore key - Answer- Woodruff key What is essential about oil? A. Viscosity B. Cleanliness C. Grade D. All off the above - Answer- All of the above (viscosity, cleanliness, grade) What is the difference between oil and grease? A. Oil requires a reservoir B. Oil has lower viscosity C. Oil flows D. All of the above - Answer- All of the above (Oil flows and has lower viscosity than grease and it also requires a reservoir) What is 90W oil typically used for? A. Chains B. Gearboxes C. Bearings D. All of the above - Answer- Gearboxes The number 6-32 means what to a screw or bolt? A. 6mm, 32 threads per inch B. 6 threads per inch and 32mm long C. number 6 with 32 threads per inch D. None of the above - Answer- NUMBER 6 (6mm diameter shaft) with 32 threads per inch What does 1/4-20 mean on a screw or bolt? A. ¼ " shaft, 20 threads per inch B. ¼ pitch, 20mm long c. number 1, 4mm shaft, 20mm long d. None of the above - Answer- 1/4" shaft, 20 threads per inch Is high viscosity oil used on chains or low viscosity oil, or low or high viscosity grease? A. Low viscosity grease B. High viscosity grease C. Low viscosity oil d. High viscosity oil - Answer- Low viscosity oil P is equal to what in Ohm's Law? A. Potential B. Power C. Parallel D. Peak - Answer- Power (watts) What is the formula for power? A. P= I^2R, P= VI, P= V^2/I B. P= I^2R, P= IR, P= V^2/R C. P= I^2R, P= VI, P= V^2/R D. P= I^2V, P= VI, P= V^2/R - Answer- P= I^2R P= VI P= V^2/R What type of current are batteries normally? A. DC b. AC c. Eddy d. Electron flow - Answer- DC What is the smallest unit of an element? - Answer- Atom In the left-hand rule of magnetism, what direction does the thumb point? A. In the direction of current flow b. In the opposite direction of electron flow C. In the direction of voltage flow d. In the direction of the pulI of gravity - Answer- In the direction of current flow (- to +) If amperage increases and voltage stays the same, what has happened to the resistance? - Answer- It has decreased