Why is a visual check of the heating strips on an electric furnace difficult to accomplish?
A) It is difficult to spot a break in a strip heater because of the small size wire used.
B) The heaters cannot be seen without removing them from the furnace.
C) It is not safe to look at an operating strip heater without wearing protective radiant reflecting headgear made specifically for safe viewing.
D) Electric strip heaters are complex devices.
B
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The normal operating temperature (coolant temperature) of an engine equipped with a 195°F thermostat is ________
A) 195°F to 215°F B) 175°F to 215°F C) 175°F to 195°F D) 185°F to 205°F
A delta-connected set of windings has a phase current of 10 A. What is the line current?
A. 5.77 A B. 10 A C. 17.32 A D. 30 A
All of the following are compressed air safety precautions except:
A. Never spin dry bearings B. Use ear protection with pneumatic tools C. Use compressed air to blow dirt off of clothing and skin D. Check and maintain hoses and fittings
¿Cuál es el diámetro MÁXIMO de los adaptadores para portabrocas (o mandriles) de niples de tubería?
a. 1/2 pulgada (1,27 cm) b. 1 pulgada (2,54 cm) c. 1-1/2 pulgadas (3,81 cm) d. 2 pulgadas (5,08 cm)