_____ is the term for when an arc is struck and the metal melts and cools quickly??
?
A. Quenched?
B. Porosity?
C. Striking?
D. Molten?
Answer: A
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Which of the following would not provide adequate hearing protection when operating a chassis dynamometer?
A. External ear muff, ANSI approved B. Internal, sponge fiber C. Internal, wax fiber D. iPhone earphones, Apple approved
A low pressure control has a "high event" and a "differential" setting. The technician wants the system to turn on at 28 psig and shut down at 2 psig. What would be the proper settings?
A. High event: 28 psig, differential: 2 psig. B. High event: 2 psig, differential: 2 psig. C. High event: 28 psig, differential: 26 psig. D. High event: 2 psig, differential: 28 psig.
After a message is transmitted, it must then be
a. decoded. b. encoded. c. channeled through an all-channel network. d. directed to the proper recipient. e. scrubbed for noise.
The motor is used in a drilling operation. When the armature voltage of the loaded motor is 200 V, the motor speed is 500 rpm. Calculate the following:
A dc, separately excited motor has the following ratings: Armature voltage = 200 V Field Constant (K?) = 3 Vs Armature resistance = 1 ? a. Armature current when the motor speed is 500 rpm b. Load torque when the motor speed is 500 rpm c. Motor speed when the armature voltage is reduced by 10% d. Armature current at the condition described in (c)