040307
Practice
Mock
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Tools & Equipment
Hand tools, power tools, measuring, lifting equipment.
Q 1 / 50
tools-equipment
L1
Why must a digital multimeter not be left set to current (amps) when used for the next measurement?
A
Battery life on the meter is reduced because the current shunt path draws more idle current from the internal cell when the rotary switch is left on the amps range
B
On the current range the meter presents a near-short circuit between probes, so connecting it across a voltage source can blow the meter fuse or damage the meter and circuit
C
Voltage measurement is faster from the off position than from the current position because the meter skips an internal range-change step on its first reading after wake-up
D
The meter loses calibration overnight because the shunt resistance drifts thermally with the rotary switch held in the current position over an extended idle period
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