major ia

Prevents the back passage of air without materially affecting the flow of sewage through it.

• Vent
• DMV
• Stack
• Trap

The system of sewers or drainage of a town.

• Sewer system
• Drainage system
• Sewerage

•  Riser

Is known as two-point perspective drawing.

• Angular Perspective
• Parallel Perspective
• Double Perspective
• Dual Perspective

What is the basis in computing the size of a house drain?

• surge flow rate of water discharge from the kitchen sink
• surge flow rate of water discharge of water from the shower
• surge flow rate of water discharge from a wash basin
• surge flow rate of water discharge from the washing machine

A plumber needs to bend copper tubing without kicking it. Unfortunately, his pipe bender breaks. What is the best thing to do?

• Buy a new pipe bender
• Expose the copper to heat
• Bend the copper tubing by hand
• Use a tubing bender

If you are skilled electrician working on a house wiring installation and there is a need for you to join straight run wires, what kind of joint will you use?

• scarfed splice
• britannia splice
• rat tail tie
• western union short and long tie

If the transistor is an NPN type the base is ____.

• Negative & Positive
• Negative
• Positive
• Common

When a semi-conductor diode`s anode terminal is supplied with negative dc voltage and the cathode with positive dc voltage, the diode bias is.

• Forward
• Reverse
• No bias
• More bias

It is a kind of circuit where there is a continuous flow of electric current.

• Close circuit
• Open circuit
• Short circuit
• Ground circuit

It is a solid state device use to amplify the small input signal to become large output signal.

• resistor
• transistor
• diode
• capacitor