state two effects of each of the following on the reliability of an equipment. i. high temperatures; ii. mechanical vibrations and shock
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List six factors considered when planning for maintenance of electrical machines ina factory. (6 marks)June/July 2020
state any two ways of minimising the effect of environmental errors in measurements
explain the function of the following tools when used for maintenance i. desoldering pump, ii. long nose pliers, iii. logic probe
State two causes and two remedies for each of the following D.C machines: (i) motor fails to start; (ii) motor mins too fast. (8 marks)June/July 2020
describe the following standards with respect with respect to measurements: i. secondary ii. working
list three merits of oscilloscopes when used in maintenance
Explain each of the following tests done on an electrical machine: (i) insulation resistance test: (ii)continuity test. (6 marks)June/July 2020
derive the dimensional equation of work done in MLT system of units
describe how to test a coil using an ohmmeter