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You Are On Multi Choice Question Bank SET 3377
168851. The speed of turbo generator is usually :
(A): 300 rpm (B): 1000 rpm (C): 3000 rpm (D): 6000 rpm
168852. Among them which is not a slandered size of PVC conduit:
(A): 15 mm (B): 19 mm (C): 32 mm (D): 25 mm
168853. V curve of a three phase synchronous motor is the relation between :
(A): Voltage and current (B): Speed and No of poles (C): Voltage and No of poles (D): Field current and armature current
168854. Pumped storage power plant belongs :
(A): Base load power plant (B): Peak load power plant (C): Either peak load or base load power plant (D): None of these
168855. The coolant used in fast breeder reactor is :
(A): Cadmium (B): Water (C): Hard water (D): Sodium
168856. In long and medium Tran's mission line the receiving end voltage is greater than sending end voltage this effect is called :
(A): Ferranti effect (B): Corona effect (C): Strobe - scopic effect (D): Skin effect
168857. The type of insulator used submarine cable is :
(A): Rubber (B): PVC (C): Gutta-percha (D): Impregnated paper
168858. SL type cables are used up to :
(A): 66 kv (B): 33 kv (C): 11 kv (D): 132 kv
168859. The fusing factor of HRC fuse is :
(A): 1.11 (B): 1.21 (C): 1.1 (D): 1.25
168860. The correct sequence of the conducting materialon the basis of conducting is :
(A): Silver, copper, gold, aluminum (B): Silver, gold, copper, aluminum (C): Silver, copper, aluminum, gold (D): Silver, aluminum, copper, gold
168861. Among them which material having highest die electric strength :
(A): Porcelain (B): Mica (C): Ebonite (D): Rubber
168862. For a human body the ear to ear resistance is about —ohm.
(A): 100 ohm (B): 500 ohm (C): 1000 ohm (D): 800 ohms
168863. The limiting temperature of class a insulator is :
(A): 120° C (B): 105° C (C): 95° C (D): 135° C
168864. Constantum is the alloy contain :
(A): 60% copper & 40% tin (B): 40% nickel & 60% zinc (C): 40% copper & 60% Zinc (D): 60% copper & 40% nickel
168865. The insulating material used for the preparationof cable joint is :
(A): Coal tar compound (B): Rubber compound (C): PVC compound (D): Bitumenes compound
168866. The ratio of mmf to reluctance is called :
(A): Flux density (B): Permeability (C): Flux (D): Magnetic leakage
168867. The tumbrule of measurement of insulation resistance of an installation should be ]less than :
(A): 500 kilo ohm (B): 2 mega ohm (C): 1 mega ohm (D): 50/no of outlets
168868. The average voltage drop of a soft graphate brush in a DC generator is :
(A): 2 volt (B): 1.6 volt (C): 1.1 volt (D): 2.2 volt
168869. A magnetic material having large area of hysterisis loop, the material having :
(A): Low permeability high retentivity (B): High permeability low retentivity (C): Low permeability low retentivity (D): High permeability high retentivity
168870. Flashing means :
(A): Create residual magnetism in a dc generator (B): Making permanent magnet (C): Initial charging method of lead acid battery (D): Failure of insulator in transmission line
168871. The equation for back emf in a DC generator Eb = :
(A): φZN/ 600 P*A (B): V + IaRa (C): φZN/60 P/A (D): IARa-V
168872. In the case of extra high voltage how much voltage can be permissible in the case of higher voltage regulation :
(A): 0.12 (B): 0.125 (C): 10% (D): 0.06
168873. Smoothening is the fire exchanging process by which :
(A): Use water for fire extinguishing (B): Cooling the fire using fire extinguishers (C): Prevent the supply of fuel to the fire (D): Isolate the fire from the supply of oxygen
168874. The current through the holding coil of a 4 point starter is limited by :
(A): Field coil (B): Resistance (C): Starting resistance (D): Holding coil only
168875. The class of measuring instrument that used for industrial and panel board application is :
(A): Class 0.1 (B): Class 1 (C): Class 0.5 (D): Classes -2
168876. Among them which method of measurement is not used for low resistance measurement:
(A): Kelvins bridge (B): Pottentiometer method (C): Wheat stone bridge (D): Ammeter volt meter method
168877. The effective value of alternating current is :
(A): 0.707 I max (B): 0.606 I max (C): 1.1 I max (D): 1.414 I max
168878. The IS code of earthing is :
(A): IS 3034 (B): IS 0334 (C): IS 3043 (D): IS 3304
168879. The depolarizer used in leclanche cell is :
(A): Zn202 (B): Zn02 (C): Mn202 (D): Mn02
168880. When four no of 2v, 4 Ah cells are connected in parallel, what will be it's Ah capacity :
(A): 4 Ah (B): 8 Ah (C): 2 Ah (D): 16 Ah
168881. Boost charging method of battery is used to the battery for charging :
(A): Over discharge battery (B): Initial charging of battery (C): For charging a dead cell (D): For normal charging of a battery
168882. For magnetic shielding which material is used :
(A): Steel (B): Iron (C): Cobalt (D): Nickel
168883. Mica capacitors are best suited for :
(A): Low frequency application (B): Low captors value required application (C): As a low pass filter (D): High frequency application
168884. For a fine hacksaw blade the pitch is :
(A): 0.8 mm (B): 1.0 mm (C): 1.4 mm (D): 1.2 mm
168885. In a megger the current coil develop torque under the influence of permanent magnet is :
(A): Anti clockwise direction (B): No torque produced (C): Clockwise direction (D): Thus clockwise or anti clockwise
168886. The Apparent power mentioned in the name plate of a CT in volt ampere at specified power factor is :
(A): CT rating (B): Burden (C): Fault KVA (D): KVA rating
168887. The primary and secondary voltage of a Delta degree of:- star transformer is out of phase with a
(A): 60° (B): 90° (C): 120° (D): 30°
168888. A 6 pole 5 KW, 50 Hz 30 motor having a full load slip of 3%, what will be the speed at full load :
(A): 1200 rpm (B): 1164 rpm (C): 970 rpm (D): 1000 rpm
168889. While testing a capacitors with the help of ohm meter the needle deflects towards zero and then goes to infinity the capacitor is :
(A): Shorted (B): Leaky (C): Open (D): Good
168890. The instrument used for measuring RPM is :
(A): Tacho - meter (B): Tong (C): Wheat stone Bridge (D): Grouler
168891. From the following, which is not characteristic of a capacitor start capacitor run motor?
(A): High starting torque (B): Good starting PF (C): Noise operation (D): High running Torque
168892. BT - 136 is a semi conductor device, the device is
(A): Diac (B): Triac (C): Transistor (D): Zener diode
168893. While using GI wire as earth continuity conductor the minimum Gauge is :
(A): 10 SWG (B): 8 SWG (C): 12 SWG (D): 14 SWG
168894. The voltage not exceeding 250 V is called :
(A): Very low voltage (B): Medium voltage (C): Low tension (D): Low voltage
168895. While erecting a pole to the ground the minimum depth kept bellow the ground
(A): l/6th part of the pole (B): l/5th part of the pole (C): l/4th part of the pole (D): l/7th part of the pole
168896. In a Gyser which material used in between the outer core and inner tank :
(A): Mica (B): Glass wool (C): Asbestos (D): Impregnated paper
168897. 1 KWH is equal to :
(A): 868 Calori (B): 36 x 105 Calori (C): 860 Calori (D): 3.6 x 106 Calori
168898. The mass of an electron is approximately :
(A): 1/1480 part of proton (B): 1/4180 part of Neutron (C): 1/4108 part of proton (D): 1/1840 part of proton
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