A common application of a center tap on the secondary of a transformer is a(n) __ Autotransformer Step-up transformer Distribution transformer All of the above None of the above

When is fluid permitted to leave the cylinder in a counterbalance valve? When system pressure exceeds fluid pressure in the chamber When the main spool is forced into its seat When pressure is applied to the cylinder's blind end When the cylinder's piston stops receiving pressure

Which type of four-way valve should be used if the actuator should not move freely between cycles? Tandem-center Open-center Block-center Spool-center

Medical technologists are developing a new type of pacemaker that, when planted inside a human's chest, uses electrical impulses to help keep a steady heartbeat. The new design will send warning signals to a patient's hospital sooner when it detects an upcoming heart problem. In testing so far, this new feature has only worked in about 25% of test patients. How does this product most likely need to be improved before doctors can report that the new technological design is successful? The product needs to better solve the problem for which it was designed. The product needs to become available to the public more quickly. The product needs to become more time effective when it is being built. The product needs to make better use of available building materials.

Decreasing pressure causes the spool in a brake valve to: Increase motor rotation speed Move out of its seat Begin closing Allow fluid flow to the system

Continue fluid delivery under high pressure Maintain reduced pressure in part of a system Trigger manual control functions when necessary Reduce hydraulic power under system pressure A function of pressure control valves is to:

Where in the line is the relief valve normally positioned? In the main system line Leading from the pump Going into the pump Returning to the supply tank

Pressure compensation valves maintain a constant pressure differential regardless of: Motor speed Valve restriction Pressure changes Fluid supply

How is the water flowhn a hydronic heating system checked? By measuring the amp draw of the pump motor and applying the formula gp=amps times 1.73 By measuring the pump motor RPM using a digital tachometer By measuring the impeller RPM using a stroboscope By measuring the pressure drop across the water pump and comparing it to a pumping performance chart

2. Multiple Choice (1 point) Which of the following is a sign that an electrical device is overheating: A. It is speeding up. B. It has a burning smell. C. It is noisy. D. It has been used a lot.

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Question Three (a)A water heater is to be installed in a bathroom Specify the; (i)Mounting height for its switch. (02 marks) (ii)Rating current for its protective device. (iii)Size of the cable to b e used for its installation. (02 marks) (b)If the supply of the water heater in 3(c a), is from a two-way consumer's unit.draw it's; (02 marks) (i)Block diagram. (06 marks) (ii)Wiring diagram. (08 marks) Question Four You have been given a task to install earthing system in a new building As a trained technician; (a)List four factors you will consider when selecting a site for the above installation. (b)Describe two methods you will use to improve the conductivity of the earthing. (04 marks) (04 marks) (c)Name four materials and two tools you will need to carn out the task. (06 marks) (d)Explain a step -by-step procedur e you wil I follow to carry out the task. (06 marks) Question Five (a)Define the following terms as applied to lightning protection. (i)Down conductor (02 marks) (ii) Air termination (02 marks) (iii)Test ioint (02 marks) (iv)Zone of protection (02 marks) (b)Identify four types of buildings which require protectior from lightning. (c)with the aid of diagram show the zone of protection offered by two vertical lightning protection system. (08 marks) (04 marks)

Chain slings cannot be damaged by heat. True False

During welding preparations what should be set up around the welding area? are blowers flash shields cotton curtains oxygen cylinders

Before engaging the PTO switch you should make sure that the controls are in neutral position. True False

What is a benefit of a grounded electrical system for workers? A. It prevents power outages in the building B. It eliminates the risk of electrical shock entirely C. It provides a safe path for current to flow in case of a fault, reducing the risk of shock D. It allows workers to touch live wires without harm

What is the minimum sire standard main breaker required for a farm building service where the expected simultaneously operated load is 118 amperes? 90 amperes 100 amperes 110 amperes 125 amperes

What is a potential hazard when working with electricity? A. Improved productivity B. Increased employee satisfaction C. Electrical shock D. Faster project completion

When you add radiator fluid to the reservoir,how full should it be? Select the correct answer and click Submit. ) Up to the "Full"mark Up to the very top of the reservoir Up to the "Add"mark

Where is the transmission dipstick normally located on a rear-wheel drive vehicle? Select the correct answer and click Submit. At the rear of the engine near the firewall Directly above the steering column and in the middle of the engine At the front of the engine

What is one factor that can wear out your vehicle's belts and hoses? Select the correct option and submit. Consistent temperatures Dirt and debris Humidity Too much cleaning