1.What is the usual cause of overheating in high speed, grease-
lubricated antifriction bearing: answer- Faulty mounting practices
2.How can too much wear in gears be reduced: answer- Proper meshed
3.Why are timing belts made with teeth: answer- Doesn't slip
4.The insert, or spider, used in flexible jaw couplings is meant to: answer-
Transmit torque and accept misalignment
5.Clutches on machinery provide for disengaging and may also: answer- Interrupt the power supply
6.What determines the selection of gear reducer size: answer- Torque and speed
7.why do metal parts seize when there is a lack of lubrication: answer- Metal to metal contact. (lube protects the bearing against corrosion)
8.What causes lubrication oil to get milky: answer- Mixing incompatible oils, contamina- tion
9.Why are heavy oils used: answer- To reduce the friction from heat and wear
10.What is viscosity?: answer- The resistance of a liquid to flow
11.Which machine condition can be determined by using oil analysis?: answer- Vari- ous types of wear and take corrective action before fails
12.Acids that form in lubricants affect performance are a result of: answer- Oxygen from the air and high temperatures .Shutting fluid discharge of an air operated reciprocating pump will cause the pump to: Overstroke
14.What is the pressure on a fluid: Measurement of force per unit area on an object in the fluid
15.What can you use to meet peak hydraulic system demands: A variable displacement pump
16.Pressure in the hydraulic system can be controlled electrically by the use of: Metering the flow of fluid into or out
17.Hydraulic valves are typically adjusted by: Flow control valve and adjustment the control
18.Hydraulic reservoir suction lines can be raised for what: Create enough vacuum
19.When air is compressed its temperature and....?: The pressure and temper- ature of the air increases
20.The speed of a piston is determined by: Crankshaft stoke and the engine RPM
21.Safe operating speed of an air motor is controlled by the: Air supply pressure
22.Air line filters and lubricators should be installed at: closer where it is going to be used
23.Solenoid valve fails to open, check what?: Normally closed (power to open)