MCQ 1 When t is the thickness of the sheet, the tip diameter for spot welding is usually

(A) 2t (B) t (C) 3T (D) VT

MCQ 2 Which of the following is an example of fusion welding

(A) Arc welding (B) Resistance welding (C) Thermit welding with pressure (D) Forge welding

MCQ 3 Which flame is suitable for cutting operations

(A) Oxidising flame (B) Carburising flame (C) Neutral flame (D) None of these

MCQ 4 The pressure of steam in a locomotive is

(A) 10 − 15 kg/cm² (B) 20 − 30 kg/cm² (C) 40 − 50 kg/cm² (D) 80 − 90 kg/cm²

MCQ 5 The range of horsepower for diesel locomotives is

(A) 100 to 500 (B) 500 to 1000 (C) 1500 to 2500 (D) 4000 to 5500

MCQ 6 Specific energy consumption is least in

(A) Urban service (B) Sub-urban service (C) Main-line service (D) Equal for all types of services

MCQ 7 Horse power of diesel locomotives is

(A) 1000 to 1500 (B) 1500 to 2500 (C) 2500 to 5000 (D) 5000 to 10,000

MCQ 8 The advantage of rectifier type welding set is

(A) Reduced no - load losses (B) Easy arc starting (C) Less hazardous (D) Both (A) and (B)

MCQ 9 The lighting system of almost all the earlier coaches and all the newly manufactured coaches has

(A) 50 V (B) 110 V (C) 220 V (D) 420 V

MCQ 10 During the train movement, the tractive effort produced at the pinion by the motor is transferred to the driving wheel

(A) Directly (B) Through the gear wheel (C) Through the road wheel (D) Through the motor armature

MCQ 11 CFL means

(A) Combustible fluoride lamp (B) Compact fluoride lamp (C) Compact fluorescent lamp (D) Combustible fluorescent lamp

MCQ 12 For regenerative braking, the motor which is not suitable is

(A) DC shunt motor (B) DC compound motor (C) DC series motor (D) AC shunt motor

MCQ 13 In tramways,

(A) Two drum controllers are employed in series (B) Two drum controllers are employed in parallel (C) Only one drum controller is employed (D) Three drum controller are employed either in parallel or series

MCQ 14 For improving the power factor of coreless type induction furnace,

(A) Capacitor is used (B) Inductor is used (C) Resistor is used (D) Transistor is used

MCQ 15 Arc welding is also known as

(A) Pressure welding (B) Plastic welding (C) Non - pressure welding (D) None of these

MCQ 16 In urban or city train service, the

(A) Acceleration period is absent (B) Free running period is absent (C) Coasting period is absent (D) Braking period is absent

MCQ 17 124) The glare can be reduced by

(A) Decreasing the height of bright light sources (B) Using glossy surfaces for bench tops (C) Using reflectors to the bright sources (D) All of these

MCQ 18 With increase in temperature of the body, the emission of light waves is

(A) Increases (B) Decreases (C) Remains same (D) None of these

MCQ 19 The core type induction furnace and the coreless type induction furnace are

(A) Low frequency, high frequency (B) Low frequency, low frequency (C) High frequency, high frequency (D) High frequency, low frequency

MCQ 20 A good heating element should have

(A) High resistivity and low melting point (B) Low resistivity and high melting point (C) High resistivity and high melting point (D) Low resistivity and low melting point

MCQ 21 Voltage required for butt welding is

(A) 2 to 8 V (B) 8 to 15 V (C) 15 to 22 V (D) 22 to 30 V

MCQ 22 Welding is not done directly from the supply mains because

(A) It is customary to use welding machines (B) Its voltage is too high (C) Its voltage keeps fluctusting (D) It is impracticable to draw heavy currents

MCQ 23 Motors preferred for rolling mill drive is

(A) D.C. motors (B) A.C. Slip ring motors with speed control (C) Both (A) and (B) above (D) None of the above

MCQ 24 Earthing is used as the return conductor for

(A) Telephone lines (B) Telegraph lines (C) Traction work (D) All of these

MCQ 25 Suburban railways use

(A) 1500 V, DC (B) 440 V, three-phase AC (C) 660 V, three-phase AC (D) 3.3 V, three-phase AC