126. Soldering of a Britannia joint is a necessity to avoid loosening of the joint due to :
127. The scar on the ovule made when the funicle detaches at maturity is known as
128. Braking torque in energy meter is produced to :
129. The biochemical test employed to assess seed viabilityis:
130. The standard secondary voltage for a PT used in power system in :
131. Which instrument always indicates true r.m.s. value irrespective of the waveform?
132. A voltmeter gives inaccurate reading to measure the drop across a low resistance because :
133. The phase difference between the currents in the two pressure coils in PF meter is :
134. When a rewound armature is rolled on the surface of a leveled surface plate the armature stops at the same position of its periphery for each rolling, the portion of armature touching the surface plate is regarded to have :
135. Which one of the follow ing characteristic is NOT applicable to synchronous motors?
136. The colour of light depends upon :
137. Which of the following lamp is a cold cathode lamp?
138. You have to repair storage type water heater which has steam in the hot water. The possible remedy for this trouble can be found by checking :
139. The reading on a 3 digit millivoltmeter started flashing continuously when connected across a resistor to measure the mV across it. The reason for flashing of display on millivoltmeter is that:
140. Shunts and multipliers used in MC instruments are made up of Mangnin. The reason for using the above metal is that, it has :
141. In order to operate a fluorescent tube set on DC supply, which of the following additional auxiliary device is to be connected?
142. The power input increases by three times when the connection of three phase loads changes from star to delta at the same line voltage. What is the reason for this?
143. In a parallel resonant circuit the capacitor current is :
144. According to National electric code what is the specified minimum distance between the washing unit and the switch board :
145. In the output voltage of a DC generator the ripple effects can be reduced by increasing the :
146. The most economic method of electrical braking is :
147. When a DC series motor is connected to an AC supply, then :
148. Dummy coils in a DC generator is provided :
149. When the number of poles and the number of armature conductors are fixed, then which winding of a DC generator will give the higher e.m.f.?
150. Earth tester is used for measuring earth resistance in which generated DC is converted into AC by current reverser. The reason for using AC supply for resistance measurement is :