Passitexams

What are the 2 main categories of screw compressor - ANSWER Oil wet and oil free dry screw comp Witch rotor is the driver on a screw compressor - ANSWER The male rotor What determines the capacity of a screw compressor - ANSWER Rotor length, diameter, lobe flute design and speed What determines the discharge pressure of a screw compressor - ANSWER The location of the inlet port along the rotor, the length of path and the discharge port location What function does the oil in a wet scr...

saddle - ANSWER the safe working load of a rigging hook is accurate only when the load is suspended from the ______________ of the hook 15 - ANSWER OSHA requires that a hook be replaced if the throat has opened _____ percent or more from it's original size. 40 - ANSWER A hook that is point loaded could theoretically carry about ________ percent of the rated load. Shackels - ANSWER Slings are attached together using ___________. 1 1/2 - ANSWER tapped holes used with screwed-in eye bo...

What is pressure defined as? - ANSWER Force per unit area F=(P)(A) What is the pressure of the Earth's atmosphere at sea level? - ANSWER 14.7 psi How is power defined? A. The rate or velocity at which power is done B. The rate or velocity at which work is created C. The speed of the velocity in a power system D. The rate or speed at which work is done. - ANSWER D. The rate or speed at which work is done. What is a watt? A. watt is one newton lifted 1 m in one second. B. Power uni...

Demulsibility is the ability of oil to a. absorb into another substance b. absorb into water c. separate from water d. maintain visibility - ANSWER c. seperate from water When oxidation of oil takes place a. oil is formed b. sludge is formed c. pour point is dropped d. slurry is formed - ANSWER a. sludge is formed One disadvantage of synthetic based fire resistant fluids is they a. are expensive b. are not coded c. fluid flow is restricted d. it attacks packing normally used i...

Two kinds of flat bearings differ from there housings they are A. Solid end of friction B. Tight and tapered C. Scored and roller D. Solid and split - ANSWER D. Solid and split **The choice of bearing tens of the load rotational speed direction of Pull and support design solid bearings and split bearings are fiction bearings You can remove bearing cups from a housing using a cup puller (inside puller) provided that? a. it is a tapered roller bearing b. it is an anto froction bearing ...

Most installation procedures start at the machine foundation substructure because? a. the manual says so b. the foundation introduces misalignments in the equipment c. the foundation moves d. the foundation is inconsistant - ANSWER b. the foundation introduces misalignments in the equipment When installing on concrete, millwrights usally start their installation on? a. level ground b. tempered ground c. the assumption that they will have to install anchor bolts d. exsiting anchor bolt...

1. What type of oil or grease would be used in a heavy load situation? a. Synthetic oil b. Extreme pressure lubricant c. Mineral oil d. Any hydraulic fluid - ANSWER b. Extreme pressure lubricant 2. The most common measurement of kinematic viscosity is what? a. Viscosity b. Centistokes c. Viscosity index d. Flash point - ANSWER b. Centistokes 3. When grease moves in a bearing, it tends to shear. This is known as: a. Pour point b. Viscosity index c. Directional fluid...

What are the principle parts of a friction bearing housing? - ANSWER Base, Base bolt slots, cap and cap bolt holes. What are friction bearing housings made from adn what factors influence the choice of housing? - ANSWER Cast Iron, Cast Steel, Fabricated Steel. Choice depends on the Load, The Rotational Speed, the Direction of Pull and the Support Design How are friction bearing dimensions expressed? - ANSWER In a fraction of their nominal size. Do all new bearings of the same shaft siz...

Auxiliary View - ANSWER view where a slanted surface is projected to a plane that is parrallel to the surface perspective, oblique, isometric - ANSWER 3 types of sketches Oblique - ANSWER Front face is of an object is drawn the same way as the front view of an orthographic Oblique - ANSWER depth is shown by parallel lines drawn at an angle going away from the front face Oblique - ANSWER the angle of the parallel lines is normally 30 degrees and 45 degrees from the horizontal Isome...

A ______ conveys a liquid. - ANSWER Pump What are the two main categories of pumps? - ANSWER Centrifugal and positive displacement Pumps at a constant capacity regardless of pressure. - ANSWER Positive displacement Which pump does not see a decrease in flow with an increase in viscosity? - ANSWER Positive displacement Name three designs of pump impellers. - ANSWER Open, semi-closed, closed What are the two main categories of pumps? - ANSWER Centrifugal and positive displacement