AP ECET EEE 2017-5

1. The Torque slip characteristics of a poly phase induction becomes almost linear at small values of slip, because in this range of slips

A. The effective rotor Circuit resistance is very large compared to the rotor Reactance
B. The rotor resistance is equals to the stator resistance
C. The rotor resistance is equals to the rotor Reactance
D. The rotor resistance is equals to the stator reactance

Answer : The effective rotor Circuit resistance is very large compared to the rotor Reactance
Explain:-

2. A capacitor start single phase induction motor is used for

A. Easy start loads
B. Medium start loads 
C. Hard start loads
D. Any type of start loads

Answer : Hard start loads
Explain:-

3. In a split phase motor, the running winding should have

A. High resistance and low inductance
B. High resistance as well as high inductance
C. Low resistance and high inductance
D. Low resistance as well as low inductance

Answer : Low resistance and high inductance
Explain:-

4. In pumped storage scheme, the generator is also used as

A. Induction generator or synchronous condenser
B. Induction generator or synchronous motor
C. Synchronous generator or induction generator
D. Synchronous motor or synchronous condenser

Answer : Synchronous motor or synchronous condenser
Explain:-

5. The flow duration curve at a given head of a hydro electric plant is used to determine the

A. Total power available at the site
B. Total units of energy available
C. Load factor of the plant
D. Diversity factor for the plant

Answer : Total power available at the site
Explain:-

6. In a nuclear power station using Boiling Water Reactor (BWR), water is used as

A. A moderator but not as a coolant
B. A coolant but not as a moderator
C. Both moderator and coolant
D. Neither moderator nor coolant

Answer : Both moderator and coolant
Explain:-

7. In a nuclear reactor, chain reaction is controlled by introducing

A. Iron rods
B. Cadmium rods
C. Graphite rods
D. Brass rods

Answer : Cadmium rods
Explain:-

8. For harnessing low variable water heads, the suitable hydraulic turbine with reaction and adjustable vanes runners is

A. Francis
B. Impeller
C. Kaplan
D. Pelton

Answer : Kaplan
Explain:-

9. The re striking voltage is measured in

A. RMS value
B. Peak value
C. Instantaneous value
D. Average value

Answer : Peak value
Explain:-

10. The rate of rise of re-striking voltage (RRRV) is dependant upon

A. Resistance of the system only
B. Inductance of the system only
C. Capacitance of the system only
D. Inductance and capacitance of system

Answer : Inductance and capacitance of system
Explain:-