955 MSS Exam 3 Answered

955 MSS Exam 3 Answered Which converts electrical energy to mechanical energy? - Answer- Motor What is a shear pin used for? - Answer- A mechanical fuse designed to break under specific torque Which has the highest viscosity? - Answer- Honey (Vicosity is how thick something is) When a device or wire is shorted, what is the indication in the circuit? - Answer- High current and low resistance (Ohm's Law V = IR) What is used to protect electronic equipment from electrostatic discharge? - Answer- Wearing a grounded wrist strap A logic gate has multiple inputs and one output. When any of the inputs is high, the output is high. What type of gate is it? - Answer- OR Gate What logic function does the truth table in Figure D represent? A|Y 0|1 1|0 - Answer- Inverter What is the time required for a signal to move through a logic circuit called? - Answer- Propagation delay What maximum size fuse should be used in a circuit with 4200W of power and 120VAC? - Answer- 30 Amps. A fuse is a safety device; maximum safety listed for 35A is 30A A class C fire extinguisher uses which component to extinguish a fire? - Answer- CO2 Before removing a blown fuse, what should be done? - Answer- Remove electricity Two Technicians and One mechanic are assigned to work on a circuit that must be de-energized; how many Iockouts are required? - Answer- 3 (one for each person with one key each) A fuse gets hot while in a circuit. What can be the underlying cause? - Answer- Fuse clips have poor connection or improper tension Grounding conduit prevents the conduit from being: - Answer- Charged to a higher potential than ground Which component might be damaged by static electricity? - Answer- Transistor If the p-p voltage of a sine wave is 200V, what is the RMS value? - Answer- 70.7 V In a purely capacitive circuit, which leads by 90°: - Answer- Current (ELI the ICE man) What type of file is used to file a round hole? - Answer- Rattail Which tool is used to remove a rivet head? - Answer- Chisel Which tool should be used to remove a gear from a shaft? - Answer- Gear puller What are diagonal pliers used for? - Answer- Cutting wires a.k.a. wire cutters When measuring the distance between the flat edges of a spark plug, what tool is used? - Answer- Feeler gauge What does a Vernier caliper measure? - Answer- Inside diameter When checking a circuit that has a maximum voltage of 24V, what range should the meter be set to initially when checking Voltage in the circuit? - Answer- 25V You need to check a fuse in a circuit where it is not advantageous to tum off the power. What should the meter be set to and what will the reading be if the fuse is good? - Answer- Max Voltage for the circuit, OV reading. When checking across the leads of a capacitor with an analog meter you note that the needle jumps to zero and then slowly moves to infinite resistance. What have you just determined? - Answer- The cap is probably good When checking across the leads of a capacitor with an analog meter you note that the needle jumps to and stays there. What have you just determined? - Answer- The capacitor is shorted Which is typically used for repairing layered printed circuit boards? - Answer- Variable wattage soldering station What is the purpose of tinning a soldering iron or component? - Answer- To remove oxidation What does a good solder joint look like? - Answer- Shiny and smooth What type of solder is used in electronic circuitry? - Answer- 60/40 Rosin core What term is used to describe solder flow that is even around a joint? - Answer- Capillary action