BEE -Mech -Set2

If the resistance in a DC circuit is 10 ohms and the voltage is 20V, what is the current?

• 2 Amps
• 5 Amps
• 0.5 Amps
• 20 Amps

In an AC circuit, the frequency is measured in?

• Ohms
• Volts
• Hertz
• Amperes

The voltage ratio in a transformer is equal to the ratio of?

• Number of turns in primary and secondary
• Resistances in primary and secondary
• Capacitance in primary and secondary
• Inductances in primary and secondary

Which motor type is used in fan and ceiling fan applications?

• Single-phase induction motor
• Synchronous motor
• BLDC motor
• Step motor

Which device trips during earth leakage?

• MCB
• MCCB
• ELCB
• SFU

What does an ELCB sense?

• Earth fault
• Short circuit
• Overload
• Temperature

Magnetic contactor mainly operates with?

• Manual force
• Electromagnetic field
• Gas pressure
• Air suction

Which type of reflector is best suited for focusing light in a spotlight?

• Parabolic
• Flat
• Elliptical
• Spherical

What is the key benefit of using LED lamps in industrial applications?

• Higher initial cost
• Less brightness
• Energy efficiency
• Lower maintenance

How is the quality of light measured?

• Through color temperature
• Through luminous efficiency
• Through foot-candles or lux
• Through wattage