Which of the following is NOT considered an ozone-depleting chemical?
A) Halons
B) Hydrochlorofluorocarbons
C) Chlorofluorocarbons
D) All of these are considered ozone-depleting chemicals
D
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Block sizes are expressed as _____ sizes, which means that each dimension includes the mortar joint.
A. sectional B. dimensional C. nominal D. architectural
Which class is a steam turbine considered to be classified in?
A. Impulse B. Reactive C. Combination D. All of the above
Each of the following statements about parking brakes is true EXCEPT:
A. on a driveline parking brake, the expanding shoes are activated by levers and cams. B. the shoes for the auxiliary parking brakes on a four-wheel disc should be inspected each time the pads are changed. C. the disc parking brake pads are adjusted by the piston seal. D. a broken return spring on a shoe may cause the parking brake to grab.
If it is necessary to switch a load current of 50 mA, then the contacts must have a good dry circuit rating and the switch must be rated for electronic duty
Indicate whether the statement is true or false