Which of the following are recommended lubricants for heavy-duty truck U-joints?
A. lithium-based grease with EP additives
B. NLGI grade 1 or 2 grease
C. NLGI grade 3 or 4 grease
D. both A and B
Answer: D
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What is an intermittent pilot ignition system?
A) a pulsing LED that indicates the burner activity B) the gas pilot is ignited with each call for heat and shut off at the end of the call C) a pilot light that only operates when the thermostat is not calling for heat D) the gas pilot light only works correctly some of the time
The Baud rate of a processor is:
a. its processing speed measured in MHz b. its processing speed measured in bits/sec c. its processing speed measured in bits/Hz d. a measure of how fast it can store information
The first priority of a good preventive maintenance program is to focus on problems that cause ________
A) overhead costs B) environmental hazards C) safety concerns D) economic damage
When tack welding coupons together, heavy-wall or large-diameter pipe may require _____
a. a full root pass without tacks b. double layers of tacks c. many very short tacks d. longer tacks