More than 40 percent of back injuries occur when? 22)
A) During the first year of work
B) On Mondays
C) During afternoon hours
D) After long holiday breaks
A) During the first year of work
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Answer the following statement(s) true (T) or false (F)
1. DC motors can be operated at a slow speed with a high torque. 2. If it is necessary to operate the motor above base speed, the field voltage is increased and armature voltage is fully applied. 3. Generally, DC motors are run at base speed or below. 4. A signal electronics module provides the overall drive control. 5. When power is applied to the drive, each of the circuit boards is simultaneously checked by the microprocessor.
The subsequent problems deal with a measurement system with a frequency response as shown below:
If the system is used to measure a sinusoidal input of frequency 0.5 rad/sec and of amplitude 2 V, the output will have an amplitude of
A. 2.5 V B. 0.5 V C. 1 V D. 0 V E. 2 V
A parallel heat reclaim system primarily recovers:
A) Sensible heat from the refrigerant. B) Latent heat from the refrigerant. C) Both sensible and latent heat from the refrigerant.
Which of the following switches can cycle the compressor clutch?
A. Thermostatic switch B. Pressure cycling switch C. Trinary switch D. All of the above have the ability to cycle the clutch