(Average)

An unbalance load of Phase A = 152 A, Phase B = 160 A and Phase C = 165 A, what is the percent loading of Phase A conductor given the data below? Express the final answer in two (2) decimal places.

ACSR #1/0 Ampacity = 242 Ampere

(a)  

(Easy)

How much time will be required for a sample of H-3 to lose 75% of its radioactivity? The half-life of tritium is 12.26 years.

(a)  

(Difficult)

What is the modulus of elasticity if the stress is 44,000 psi and unit strain of 0.00105? Express the final answer in three decimal places.

(a)  

(Average)

A class trip of 314 students go to the a museum. Some students pay regular price at $35 and some students get a discount and pay $21.50. The class trip cost a total of $10,072. How many students get the discounted price of $21.50?

(a)  

(Easy)

In the diagram shown below, find the equivalent resistance in ohms found between terminals X and B. The resistance of each resistor is equal to 1000 ohms. Round off your answer up to 2 decimal places.

(a)  

(Difficult)

A 5 kVA, 200 V/400 V, single-phase transformer has a secondary terminal voltage of 387.6 volts when loaded. Determine the regulation of the transformer.

(a)  

(Average)

Two wattmeter connected to measure power read W1= 30kW and W2= 55kW respectively. What is the power factor of the circuit?

(a)  

(Average)

A company which manufactures electric motors has a production capacity of 200 motors a month. The variable costs are P150.00 per motor. The average selling price of the motors is P275.00. Fixed costs of the company amount to P20,0000.00 per month which includes taxes. The number of motors that must be sold each month to break even is closes to?

(a)  

(Difficult)

Solve for the value of x in the expression

(a)