Which of the following is NOT a safety procedure for power tools?

A. Point the tool directly toward a person.
B. Do not use tools that are too heavy or too difficult to control.
C. Avoid using tools in dangerous environments.
D. Do not carry the tool by its cord or hose.


A. Correct. You should never point the tool toward a person.
B. Incorrect. You should not use tools that are too heavy or too difficult to control.
C. Incorrect. You should avoid using tools in dangerous environments.
D. Incorrect. You should not carry the tool by its cord or hose.

Trades & Technology

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In the case of a back weld, the back weld is made first and then a groove weld is applied.

Answer the following statement true (T) or false (F)

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A refrigerator using a 0.5 hp motor has a coefficient of performance of 3.05. 2 gallons of tea (model as water) is placed into the refrigerator at 80oF. How long will it take for the refrigerator to cool the tea to 40oF, assuming that this is the only heat load to be considered. Does this seem realistic? If not, what assumptions were made which make the calculation appear unrealistic?

Given: ?= 3.05; W?= -0.5 hp = 0.3534 Btu/s; Water: V= 2 gal = 0.2674 ft3; T1 = 80oF; T2 = 40oF Assume: The refrigerator is operating in a cyclic fashion. The water behaves as an incompressible substance with constant specific heats: c = 1 Btu/lbm-RSolution: What will be an ideal response?

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Which of these statements concerning the SAE flare fittings used on hydraulic brake systems is TRUE?

A) Have a 45-degree taper on the male part of the fitting B) Have a 20-degree taper on the male and female parts of the fitting C) Have no taper on the female part of the fitting D) Must be single flared

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Which of the following vehicles will have the longest stopping distance?

a. Bobtail tractor. b. Loaded truck. c. Empty truck. d. None of the above.

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