A. Air filter
B. Fuel injector
C. Exhaust silencer
D. Battery
✅ The correct answer is option B.
Engineering MCQs
Which of the following mainly decides the current to be employed is arc welding?
A. Electrode size
B. Plate thickness
C. Voltage across the arc
D. Welded portion length
✅ The correct answer is option A.
Which of the following is not a natural abrasive?
A. Silicon carbide
B. Quartz
C. Corundum
D. Emery
✅ The correct answer is option A.
Expansion device used in a window air-conditioner is a/an
A. Automatic expansion valve
B. Thermostatic expansion valve
C. Float valve
D. Capillary tube
✅ The correct answer is option D.
Freezing of 35% oleum during its shipment in winter is avoided by the addition of small amount of
A. Hydrochloric acid
B. Methyl alcohol
C. Formic acid
D. Nitric acid
✅ The correct answer is option D.
The normal stress is the same in all directions at a point in a fluid, only when the fluid
A. Is at rest & has zero viscosity
B. Is frictionless
C. Fluid layer has no motion relative to an adjacent layer of fluid
D. Is incompressible & frictionless
✅ The correct answer is option D.
The function of a nozzle provided in steam turbine is to
A. Throttle down (i.e., reduce) the pressure of steam
B. Convert internal energy into kinetic energy
C. Increase the velocity of steam
D. All of the above
✅ The correct answer is option D.
The swift cup test evaluates the following property of a sheet metal.
A. Stretchability
B. Drawability
C. Bendability
D. None of these
✅ The correct answer is option B.
Usual value of the resistance suitable for a wire resistance strain gauge is __________ ohms.
A. 20
B. 80
C. 120
D. 500
✅ The correct answer is option C.
In a counter flow heat exchanger, hot fluid enters at 170°C & leaves at 150°C, while the cold fluid enters at 50°C & leaves at 70°C. The arithmetic mean temperature difference in this case is __________ °C.
A. 20
B. 60
C. 120
D. ∞
✅ The correct answer is option D.