What is the difference between the U-value of glass and U-value of glazing?
What will be an ideal response?
U-value of glass refers to that of glass alone. Glazing comprises glass and its frame. If the frame consists of a highly
conducting material such as aluminum, the U-value of glazing is higher than that of glass. With wood framing, the
opposite is the case. Therefore, in a glazing, the U-value at the center of glazing represents the U-value of glass.
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Answer the following statement(s) true (T) or false (F)
1. Mechanical type brakes cannot hold a suspended load.
2. In the accompanying figure, the brake is applied automatically when the motor is not operating.
3. Dynamic braking for a DC motor is very effective, but the braking effect becomes weaker as the armature slows down.
4. Plugging is used with direct current motors more than with three phase squirrel cage motors.
5. One method of providing plugging control is with the use of an automatic timed circuit.
The term __________ refers to the property of a material that absorbs or loses water.
A. mass density B. airatrons C. hygroscopic
A technical drawing must indicate the permissible variation of size and form.
Answer the following statement true (T) or false (F)
Describe the relationship between field of view size and total magnification
How does this affect microscope use?
What will be an ideal response?