A:-20 dB
B:-45 dB
C:-72 dB
D:-37 dB
Correct Answer:- Option-C
Question58:-Which of the following causes the drain current to increase with *V_(DS)* in the saturation region ?
A:-Channel length modulation
-Inversion charge in the channel
C:-Body effect
D:-Hole mobility
Correct Answer:- Option-A
Question59:-Why is polysilicon, rather than metal, used for the gate in modern MOS transistors ?
A:-Better channel inversion
B:-It simplifies the fabrication process
C:-Lower resistance
D:-Makes a better contact to sources and drains
Correct Answer:- Option-B
Question60:-What is the level of roll off in most OPAMPs ?
A:--6 dB/decade
20 dB/octave
C:--6 dB/decade or -20 dB/octave
D:--6 dB/octave or -20 dB/decade
Correct Answer:- Option-D
Question61:-Choose the open thermodynamic system
A:-Manual ice cream freezer
B:-Centrifugal pump
C:-Pressure cooker
D:-Automobile battery
Correct Answer:- Option-B
Question62:-Choose the specific property of a thermodynamic system
A:-Density
B:-Viscocity
C:-Temperature
D:-Pressure
Correct Answer:- Option-A
Question63:-One ton of refrigeration is equivalent to
A:-1 kW
B:-2 kW
C:-3.5 kW
D:-100 kw
Correct Answer:- Option-C
Question64:-What is mounted on the crankshaft to transform rotary motion into back and forth motion for actuating the
valves ?
A:-Fly wheel
B:-Slider and crank
C:-Crank
D:-Cam shaft
Correct Answer:- Option-D
Question65:-Which is not a part of petrol engine ?
A:-Valve mechanism
B:-Fuel injector
:-Induction coil
D:-Air filter
Correct Answer:- Option-B
Question66:-A pelton wheel is ideally suited for
A:-High head/Low discharge
B:-High head/High discharge
C:-Low head/Low discharge
D:-Medium head/Medium discharge