SSC JE / State Electricity Boards JE Electrical Exams QUIZ-6

Attempt now to get your rank among 1989 students!

Question 1

A single-phase 2000 V alternator has armature resistance and reactance of and respectively. The voltage regulation of the alternator at 100 A load at 0.8 p.f. leading is

• A7%
• B0%
• C14%
• D-8.9%

Question 2

A series motor takes a current of and runs at Armature resistance and series field resistance If iron and friction losses amount to what is the overall efficiency?

• A71.4%
• B69.5%
• C83.4%
• D91%

Question 3

A 2-conductor cable 1 km long is required to supply a constant current of 200 A throughout the year. The cost of cable including installation is Rs. (20a + 20) per metre where a is the area of cross-section of the conductor in cm². The cost of energy is 5P per kWh and interest and depreciation amount to 10%. The resistivity of the conductor material is 1.73 Energy lost per annum is

• A
• B
• C
• D

Question 4

Find the total number of strands in a ACSR conductor if the given number of layers is 5

• A61
• B12
• C36
• D13

Question 5

Find the current through 5Ω resistor:

• A3.5 A
• B7.15 A
• C5 A
• D2.85 A

Question 6

Which of the following is the other name of reactive power?

• AWattles power
• BQuadrature power
• CBoth A and B
• DNone of these

Question 7

Which of the following statement is incorrect with respect to the resistance level of a diode?

• AThe dc resistance in the reverse-bias region will be quite high
• BThe ac resistance will be higher, if the operating point is lower
• CThe dc resistance is defined by a point on the VI- characteristics
• DThe ac resistance is defined by a straight line between limits of operation

Question 8

In Fig., the Cross-section of the is circular and has radius 1.2$ mm. The mean length of the core is 30 cm. If the flux in the core is , then H in air-gap is

• A9.21
• B9.29
• C9.52
• D9.71

• 1989 attempts
• 9 upvotes
• 18 comments