A fresh set of 20 random questions is generated every time you open this page and every time you refresh it.For each of the following multiple choice questions, choose the most appropriate answer :
1. In a primary cell, the local action can be rectified by :
A. Charging the cell
B. Amalgamating the zinc electrode with mercury
C. Using a cell for a few minutes only
D. Making a dry cell
2. With gate open, the maximum anode current at which SCR is turned off from ON condition is called
A. breakdown voltage
B. peak reverse voltage
C. holding current
D. latching current
3. A safety programme consists of
A. Three E’s
B. Four E’s
C. Five E’s
D. Six E’s
4. For neutralizing the demagnetizing effect of armature reaction, an extra number of winding turns are provided on each pole. To calculate number of extra turns per pole the equation used is
A. (ATd / I) * leakage coefficient
B. (ATd / I) / leakage coefficient
C. Leakage coefficient / (ATd / I)
D. (ATd / I)
5. If the transformers have different votage ratios (Ep / Es) and there parallel operation is desired, then :
A. They will not work on load
B. They will not work at all
C. They will work at different power factors
D. They will work at average voltage
6. With the increase in the excitation current of synchronous motor the power factor of the motor will
A. improve
B. decrease
C. remain constant
D. depend on other factors
7. A Colpitt's oscillator employs :
A. Inductive feedback
B. Capacitive feedback
C. Negative feedback
D. Stray capacitance feedback
8. 7BF16 = __________ 2
A. 0111 1011 1110
B. 0111 1011 1111
C. 0111 1011 0111
D. 0111 1011 0011
9. Any physical system which does not automatically correct for variation in its output, is called ?
A. Open loop system
B. Closed loop system
C. Unstable system
D. None of these
10. Current is converted to voltage :
A. through a voltmeter
B. through a resistance
C. through an ammeter
D. through a galvanometer
11. The amount of flux density set up in the core is dependent upon
A. Current
B. No. of turns, cross sectional area of core
C. Materials of the magnetic core, length of core
D. All of these
12. Q factor is called :
A. Quality factor
B. Quantity factor
C. Queen factor
D. Quarter factor
13. Digital circuit can be made by the repeated use of ………………
A. OR gates
B. NOT gates
C. NAND gates
D. None of the above
14. Industrial safety management if that branch of management which is concerned with ______ hazards from the industries
A. Reducing
B. Controlling
C. Eliminating
D. All these
15. Which is not a type of conduit wiring?
A. Rigid steel conduits
B. Rigid non-metallic conduits
C. Flexible conduits
D. TRS wiring
16. Voltage required to operate a neon sign tube depends upon :
A. Diameter of the tube
B. Gases in the tube
C. Length of the tube
D. Thickness of the tube
17. Capacitance of a small single phase motor, less than 1 HP, would be in order of :
A. Hundreds of farads
B. Tens of farads
C. Tens and hundreds of picofarads
D. Tens and hundreds of microfarads
18. In refrigerators the commonly used motors are
A. Split phase induction motors
B. Capacitor induction motors
C. Shaded pole induction motors
D. None of these
19. Which wiring is used to draw TRS cables on Teak wood?
A. Cleat
B. Batten
C. PVC
D. All of these
20. A solid substance or insulated conductor subjected to tensile stress with or without screen is called :
A. Cable
B. core
C. Conductor
D. Wire
Public Hospital 554/7 New Anaj Mandi, Fatehabad 125050 M: 9810570740, 9810571993
Tel: 01667221011, 9810570740, 9810571993 facebook.com/doctorkc