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Questions in engineering

[Answered] Which of the following is recommended for the maintenance and care of a screwdriver? A. Periodically harden with a torch. B. File by hand to dress the tip. C. Shape the tip with a grinder. D. Reshape the tip with a hammer.

[Answered] What is the function of a metering device in a refrigeration system? Meters refrigerant vapor into the compressor Increases the pressure of liquid refrigerant into the condenser Vaporizes all liquid refrigerant before it enters the evaporator Reduces the pressure and saturation temperature of liquid refrigerant

[Answered] If a vehicle is equipped with two drive motors, rated at 250 kW and 291 kW respectively, what is the total power rating for the vehicle? A. 41 kW B. 250 kW C. 291 kW D. 541 kW

[Answered] A crate required 900 newtons (N) of force to lift. The crate was lifted by a forklift with an engine that provided 225 N of force. What is the mechanical advantage of the forklift? A. 0.25 B. 4 C. 1,125 D. 202,500

[Answered] The temperature range of the flue gases in an induced-draft furnace is [tex]$\qquad$[/tex]. A. [tex]$90^{\circ} F$[/tex] to [tex]$100^{\circ} F$[/tex] B. [tex]$101^{\circ} F$[/tex] to [tex]$274^{\circ} F$[/tex] C. [tex]$401^{\circ} F$[/tex] to [tex]$600^{\circ} F$[/tex] D. [tex]$275^{\circ} F$[/tex] to [tex]$400^{\circ} F$[/tex]

[Answered] Which of the following component failures will cause an increase in refrigerant pressures? A. Faulty evaporator fan motor B. Refrigerant leak C. Faulty condenser fan motor D. Faulty liquid line solenoid

[Answered] A walk-in with TEV has the following conditions: Subcooling is 0° LOW Superheat is 25° HIGH Which of the following could cause this condition? A. Overcharge B. Undercharge C. Dirty condenser D. Dirty or iced evaporator

[Answered] Which action exposes workers to fall hazards? A. Overreaching B. Paying attention C. Respecting fall hazards

[Answered] 3. Which of the following foam delivery systems operates using A. Injection systems B. Induction C. Batch mixing D. Pre-mixing 4. Foam after being aerated, as it exits nozzle or discharge device is a A. foam solution

[Answered] Which type of pliers is best suited for grasping small components? A. combination pliers B. needle nose pliers C. locking pliers D. diagonal cutting pliers